Transcript
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna Operations and Maintenance Manual 90225001 Rev G
SeaSpace Corporation 12120 Kear Place Poway, CA 92064 USA
T.L. Young 3 May 2002
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna Operations and Maintenance Manual 90225001 Rev G
SeaSpace Corporation 12120 Kear Place Poway, CA 92064 USA
T. L. Young
3 May 2002
SeaSpace provides this manual “as is” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. SeaSpace may make improvements and/or changes in the programs and equipment described in this manual at any time and without notice.
Copyright SeaSpace Corporation 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002. All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.
Word-processing/Desktop publishing by: Elizabeth Bragg, April Clark, Kris Koho, Karen Lowe, and Jane Zeer Drawings by: Mark McGuire, Chris Raynor, Dan Stenger, and Jason Vaughn Printed in the United States of America.
SeaSpace Corporation 12120 Kear Place Poway, CA 92064 USA
Revision History
Revision Date
Comments
1.0
2 Feb. 1996
Released. 1.2 m Antenna only.
1.1
23 Apr. 1996
Added 1.0 m Antenna.
1.2
19 May 1997
Added TAC-92 PROM 1.61 changes. (Gyro Type = None). Added compass type tables. Added NMEA-monitor.
A
15 October, 1998
Added TeraScan 2.6 vs. TeraScan 3.0 differences. TeraScan 3.0 Software commands shown. Added antenna parts identification. Added ACU details. Added system configuration files - removed. environmental variables.
B
21 December, 1998
Added 1.5 m antenna (SAR60). Converted manual to FrameMaker.
C
29 November, 1999
Added 3.0 m antenna (SAR120).
D
22 January, 2001
Added 1.5m L&S-band dual feed/LNA/DC antenna [70268011].
E
7 March, 2001
Replace L-band feed [12667004] with [12218002] — ECR 01-0116.
F
15 Nov, 2001
Added 12218002 HRPT feed to 3.0m antenna.
G
3 May 2002
Added TAC-92 switch states. Added new diagnostics, (Stepper motor, How it works.) Added TAC-92 settings. Added azimuth belt adjustment procedures.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page v
Revision History
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Table of Contents Revision History................................................................................................................. v List of Drawings and Figures .......................................................................................... xi Figures by Number.......................................................................................................... xv Chapter 1: Introduction..................................................................................................... 1 1.1. Purpose of this Manual.................................................................................................................... 1.2. What's Covered in this Manual ...................................................................................................... 1.3. Related Documents .......................................................................................................................... 1.4. Conventions Used in this Manual................................................................................................... 1.5. Differences in Software Between TeraScan Versions 3.0 and 2.6 .........................................................................................................
1 1 2 2 3
Chapter 2: Description..................................................................................................... 11 2.1. Technical Description..................................................................................................................... 11 2.2 Physical Description........................................................................................................................ 15 2.2.1. Environment........................................................................................................................... 15 2.2.2. Mechanical Description ....................................................................................................... 16 2.2.3. Tracking Positioner Description........................................................................................... 16 2.2.3.1. Stabilization System (1.0m/1.2m Antennas Only).................................................16 2.2.3.2. Positioning System......................................................................................................17 2.2.3.3. 3.0m Antenna Tracking Pedestal ..............................................................................17
Chapter 3: Assembly........................................................................................................ 21 3.1. Tracking Antenna Site Preparation............................................................................................... 21 3.1.1. Tracking Antenna Site Selection ......................................................................................... 21 3.1.2. Antenna Cable Conduit Run for a Permanent/Fixed Site .............................................. 22 3.1.3. Heater Cable Conduit Run for a Permanent/Fixed Site ................................................. 22 3.1.4. Pedestal Construction for a Permanent/Fixed Site.......................................................... 23 3.1.4.1. Antenna Pedestal Construction - 1.85 m (72”) Radome - 1.2 m/1.5 m Dish ......24 3.1.4.2. Antenna Pedestal Construction - 1.44 m (56”) Radome - 1.0 m Dish ..................25 3.1.4.3 Antenna Pedestal Construction 3.7 m (144") Radome ¾ 3.0 m Dish ....................33 3.1.5. Antenna Orientation (Land-Based or Shipboard Mounting).......................................... 33 3.1.6. Installation Equipment Required........................................................................................ 33 3.2. Tracking Antenna Assembly ......................................................................................................... 37 3.2.1. Antenna Assembly - 1.2m (48”) /1.5m (60”) Antenna, Permanent/Fixed ................... 37
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Table of Contents
3.2.1.1. Antenna Orientation ...................................................................................................37 3.2.1.2. Antenna Mounting and Radome Assembly.............................................................37 3.2.1.3. Removal of Antenna Shipping Blocks......................................................................38 3.2.1.4. Antenna Cabling to Inside Equipment ....................................................................38 3.2.1.4.1. Wiring Separate Feed and Downconverter .................................................... 38 3.2.1.4.2. Wiring Integrated Feed/LNA/Downconverter ........................................... 39 3.2.1.5. Antenna/Pedestal Mechanical Checklist ................................................................40 3.2.1.6. Gyro Compass Wiring - Shipboard Use (Optional) (“[nav-1] nav.type”/ COMPASS_TYPE0 = 2, 3, or 4) .................................................................................40 3.2.2. Assembly 1.0 m (39”) Antenna, Permanent / Fixed ......................................................... 71 3.2.2.1. Antenna Orientation ....................................................................................................71 3.2.2.2. Antenna and Radome Mounting ..............................................................................71 3.2.2.3. Removal of Antenna Shipping Blocks......................................................................71 3.2.2.4. Antenna Cabling to Inside Equipment .....................................................................71 3.2.2.5 Antenna/Pedestal Mechanical Checklist .................................................................77 3.2.3 Antenna Assembly 3.0 m (120") Antenna, Permanent/Fixed ........................................ 77 3.2.3.1 Antenna Orientation ....................................................................................................77 3.2.3.2 Radome Assembly .......................................................................................................77 3.2.3.3 Radome Installation ....................................................................................................78 3.2.3.4 Removal of Shipping Blocks.......................................................................................81 3.2.3.5 Antenna Cabling to Inside Equipment .....................................................................81 3.2.3.6 Antenna/Pedestal Mechanical Checklist .................................................................81
Chapter 4: Startup of the Tracking Antenna................................................................ 83 4.1. Switch Settings and Indicator Lights ........................................................................................... 83 4.2. Power-On Sequence ....................................................................................................................... 87 4.3. Calibration ....................................................................................................................................... 87 4.3.1. Cable Calibration................................................................................................................... 87 4.3.1.1. Calibration of the Antenna Cable and System Checkout - TAC-92.....................87 4.3.1.2. Calibration of the Antenna Cable and System Checkout—ACU.........................90 4.3.2. Alignment of the Tracking Antenna................................................................................... 91 4.3.2.1. Antenna Alignment Using the Sun ..........................................................................92 4.3.2.2. Antenna Alignment Using Signal Strength.............................................................93 4.3.2.2.1. Fine-Tuning the Antenna Alignment ............................................................. 93
Chapter 5: Operation ....................................................................................................... 95 5.1. Quick Checks of Correct Operation............................................................................................. 95 5.1.1. Antenna Controller Testing .................................................................................................. 95 5.1.1.1. TAC-92 Antenna Controller ......................................................................................95 5.1.1.2. Antenna Controller Status Test .................................................................................96 5.1.2. Antenna Controller Drive Motor Test ................................................................................ 97 5.1.2.1. TAC-92 Antenna Controller Drive Motor Test .......................................................97 5.1.2.2. ACU Antenna Controller Drive Motor Test...........................................................98 5.1.3. Optional: Heater Test........................................................................................................... 99 5.2. Antenna Monitoring..................................................................................................................... 100 5.3. Operating Sequence ..................................................................................................................... 101 5.4. Periodic Maintenance................................................................................................................... 102 5.5. Consumables ................................................................................................................................. 102 5.6. Fuses ............................................................................................................................................... 102
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Chapter 6: Fault Isolation............................................................................................. 103 7.1. Causes of Loss of Pass Data.......................................................................................................... 103 7.1.1. Gradual or Temporary Loss of Data ................................................................................. 103 7.1.2. Complete Loss of Data ........................................................................................................ 104 7.1.3. No Data Received After Setup of Antenna ...................................................................... 104 7.2. Antenna Subsystem Diagnostics ................................................................................................ 105 7.2.1. Test Environment ................................................................................................................ 105 7.2.2. Test Equipment ..................................................................................................................... 105 7.2.3. Antenna Controller Unit (ACU) ........................................................................................ 106 7.2.3.1. Antenna Controller Unit - TAC-92/ACU .............................................................106 7.2.4. Antenna Tracking ................................................................................................................ 108 7.2.4.1. Antenna Tracking - TAC-92.....................................................................................108 7.2.4.2. Stepper Motor Motion Test ......................................................................................111 7.2.5. RF Electronics ...................................................................................................................... 114 7.2.6. Gyro Interface........................................................................................................................ 117 7.2.6.1. Gyro Interface - TAC-92 ...........................................................................................117 7.2.7. General System Faults......................................................................................................... 120 7.2.8. Antenna Heater (Optional) ................................................................................................ 120 7.3. How It Works ................................................................................................................................ 121 7.3.1. Tracking Process .................................................................................................................. 121 7.3.2. Hardware Components ...................................................................................................... 121 7.3.3 Isolating Failures.................................................................................................................... 122
Chapter 7: Repair Procedures...................................................................................... 123 Summary of Repairs ............................................................................................................................. 123 8.1. Tool Kit [70042xxx] ....................................................................................................................... 125 8.2. Antenna Components ................................................................................................................... 133 8.2.1. Elevation Stepper Motor and Drive Sprocket ................................................................. 138 8.2.2. Elevation Drive Belt ............................................................................................................ 151 8.2.3. Elevation Pot and Coupling ................................................................................................ 152 8.2.4. Azimuth Stepper Motor and Drive Sprocket .................................................................. 154 8.2.5. Azimuth Pot and Drive Sprocket ....................................................................................... 165 8.2.6. Azimuth Drive Belt ............................................................................................................. 168 8.2.7. Gyro Frame [12573001] (1.0/1.2m only)............................................................................ 170 8.2.8. Antenna Wiring Harness [12573034] [12573094] [12573708].......................................... 173 8.2.9. Separate Downconverter [70151xxx] (HD100) ................................................................ 175 8.2.10. Separate Feed/LNA [12763xxx] [12799001]................................................................... 176 8.2.11. Integrated Feed/LNA/Downconverter.......................................................................... 181 HRPT (L-Band) Specifications [12218001] / [12218002]............................................................ 190 DMSP (S-Band) Specifications [12218001] .................................................................................. 191 8.2.12 Power Injector [12791001].................................................................................................. 192 8.2.20. Azimuth Alignment and Azimuth Belt Tension Adjustment...................................... 194 8.2.21. Elevation Alignment and Elevation Belt Tension Adjustment.................................... 199 8.2.22. Antenna Balancing ............................................................................................................ 202 8.2.23. Antenna Control Cable Calibration ................................................................................ 207 8.2.23.1. Antenna Control Cable Calibration - TAC-92 .....................................................207 8.2.23.2. Antenna Control Cable Calibration - ACU..........................................................209 8.2.24. Azimuth Drive Belt Alignment (1.0m/1.2m/1.5m) ..................................................... 216 8.2.30. Antenna Control Unit (ACU)/(TAC-92)........................................................................ 218
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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8.2.31. Fan-Out for TAC-92 [12573095]/ for ACU [12573105] ................................................ 219 8.2.31.1. TAC-92 Fan-Out [12573095]..................................................................................219 8.2.32. Motor Board Replacement - TAC-92 [12573010]........................................................... 222 8.2.33. Bridge Rectifier - TAC-92 [12573030].............................................................................. 224 8.2.34. Power Module Replacement - TAC-92 [12573015]....................................................... 225 8.2.35. PROM Replacement on the TAC-92 [12573090] ........................................................... 226 8.2.36. Record the Current Settings of the TAC-92 ................................................................... 228 8.2.37. Enter Settings in the TAC-92 ........................................................................................... 230 8.2.40. Logic Board - ACU [12573104] ......................................................................................... 231 8.2.41. RS232 Daughter Board - ACU [12573104]....................................................................... 232 8.2.42. Motor Board - ACU [12573104] ........................................................................................ 233
Chapter 8: Configurations ............................................................................................ 243 9.2. Major Components ....................................................................................................................... 243
Chapter 9: Appendices .................................................................................................. 275 10.1. Glossary ....................................................................................................................................... 275 10.1.1. Environment Variables/System Configuration............................................................ 276 10.1.2. PROM Version History...................................................................................................... 278 10.2. Antenna-Related TeraScan Software Summary..................................................................... 279 10.2.1. ac .......................................................................................................................................... 279 10.2.2. align ..................................................................................................................................... 281 10.2.3. alignnorth ........................................................................................................................... 282 10.2.4. antenna................................................................................................................................ 284 10.2.5. autoalign ............................................................................................................................. 285 10.2.6. nmea_monitor.................................................................................................................... 286 10.2.7. shipheading........................................................................................................................ 290 10.2.8. sunalign............................................................................................................................... 292 10.2.9. sunclock .............................................................................................................................. 293 10.2.10. tkconfig [TeraScan 2.6 Only]........................................................................................ 294 10.2.11. trackeye ............................................................................................................................. 295 10.2.12. whereami .......................................................................................................................... 296
Index ................................................................................................................................. I-1
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List of Drawings and Figures Figure 1: TeraScan 1.2 m (48”)[12549xxx] and 1.5 m (60") [12855xxx] Polar Satellite Tracking Antenna - Radome Enclosed.............................................................. 5 Figure 2: TeraScan 1.0 m (39”) Polar Satellite Tracking Antenna [12551xxx]- Radome Enclosed ........................................... 7 Figure 3: TeraScan 3.0 m (120") Polar Satellite Tracking Antenna [12580xxx]- Radome Enclosed ........................................... 9 1.0/1.2/1.5/3.0 m Antenna and Related Hardware Drawing (70973) .................................................. 13 Pedestal - 1.2 m (48”)1.5 m (60") [800-70212001] ....................................................................................... 27 Shipboard Antenna Alignment -- 1.0m/1.2m Antennas Only (800-07050) .......................................... 29 1.0 m Antenna Pedestal (800-07036)............................................................................................................ 31 Radome Base Frame Assembly (109256-L) ................................................................................................ 35 1.2m/ 1.5m Dish Antenna Assembly - 1.85 m (72”) Radome (800-07024) ............................................ 41 1.2 m/1.5 m Dish - Radome Installation Model 4884 DBS (109632-B)................................................... 43 1.2 m/1.5 m Dish - 72” Radome Assembly ( 111406-0)............................................................................ 45 1.2 m/1.5 m Dish - System Assembly 4884 ( 109337-0)............................................................................ 47 1.2 m/ 1.5 m Dish - Radome Installation - Model 4884DBS (109632-C) ................................................ 49 Antenna Cabling Integrated Feed/LNA/DC (70928).............................................................................. 51 Integrated Feed/LNA/DC for HRPT/DMSP (70928005) ....................................................................... 53 HRPT or HRPT/WEFAX Antenna Cabling — Feed & Downconverter (800-07015) .......................... 55 Antenna Cabling - HRPT/WEFAX + DMSP (800-07070) ....................................................................... 57 Integrated Feed/LNA/Downconverter on a 1.5 m Antenna (70929).................................................... 59 TAC-92 and SeaSpace Downconverter on SeaTel Antenna (800-07126) ............................................... 61 ACU & SeaSpace Downconverter on SeaTel Antenna (800-07125)........................................................ 63 HDD-100 Downconverter Connector (800-07072) .................................................................................... 65 Antenna Cabling - TAC-92 - HR100/HR200 (800-07127) ........................................................................ 67 Antenna Cabling - ACU - HR100/HR200 (1240-07121) ........................................................................... 69 Antenna Assembly 56” Radome (800-07025)............................................................................................. 73 56” Radome Installation Arrangement (108871-B) ................................................................................... 75 144” Radome Assembly (111365) ................................................................................................................ 79
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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List of Drawings and Figures
Antenna Repair Kit 70221 Sheet 1............................................................................................................. 127 Antenna Repair Kit 70221 Sheet 2............................................................................................................ 128 Antenna Repair Kit 70221 Sheet 3............................................................................................................ 129 Stepper Motor (70973020) ........................................................................................................................... 130 Azimuth Pot (70973021) .............................................................................................................................. 131 Elevation Pot (70973022) ............................................................................................................................. 132 Elevation Pan Assembly 1.0m/1.2m/1.5m (111596A) ........................................................................... 141 AZ Yoke/Spindle Assembly - 3.0m (113218)........................................................................................... 143 Antenna Schematic SeaTel 1.5 m with Integrated Feed/LNA/DC (70930) ....................................... 145 Antenna Schematic Model 3.0m SAR-120 (113214)................................................................................ 147 Antenna Schematic 4884L/4084L (800-07128) ......................................................................................... 149 General Assembly 3.0 m Model SAR-120 (116536) ................................................................................. 157 General Assembly 1.5 m Model SAR60 (70931)....................................................................................... 159 Stabilized Antenna Pedestal Assembly Model 4554L (110677)............................................................. 161 1.0 m Stabilized Antenna Pedestal Assembly Model 4084 L (111598-A)............................................ 163 Gyro Frame Top View (800-07100) ............................................................................................................ 171 Polar Tracking Feed/LNA (12763xxx)...................................................................................................... 177 SCD Feed/LNAs (12799001) ...................................................................................................................... 179 HRPT Feed/LNA/Downconverter [70928006] ....................................................................................... 183 HRPT Feed/LNA/Downconverter [70928010] ....................................................................................... 185 Integrated Dual HRPT/DMSP Feed/LNA/Downconverters (70928007)........................................... 187 Dual Feed Block Diagram (70928008) ....................................................................................................... 189 Power Injector (70928009) ........................................................................................................................... 193 AZ Yoke Assembly (111168)....................................................................................................................... 197 3.0 m Equipment Frame Assembly (113217)............................................................................................ 205 TAC-92 (112909-C) ....................................................................................................................................... 211 ACU PCB Assembly (112228)..................................................................................................................... 213 ACU PCB Schematic (112226) .................................................................................................................... 215 TAC-92 - Fan Out Schematic (112654-B)................................................................................................... 221 TAC-92 General Assembly (112572).......................................................................................................... 223 Antenna Control Unit (ACU) Assembly. Chassis Wiring Diagram 4884L (110758-B) ..................... 235 Motor Driver Board Assembly (111419-0)............................................................................................... 237 ACU Motor Driver Board Schematic (110942-B) ..................................................................................... 239 Logic Board Assembly (110759-A)............................................................................................................. 241 Webb Clamp (70044)................................................................................................................................... 247 1.2 m Antenna Heater Coil 70407 Rev B (Sheet 1 of 3) .......................................................................... 249 1.2 m Antenna Heater Coil 70407 Rev B (Sheet 2 of 3) .......................................................................... 251 1.2 m Antenna Heater Coil 70407 Rev B (Sheet 3 of 3) .......................................................................... 253 1.2 m Antenna Thermostat Assembly 70048 (Sheet 1 of 3) ................................................................... 255 1.2 m Antenna Thermostat Assembly 70048 (Sheet 2 of 3) ................................................................... 257
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SeaSpace Corporation
List of Drawings and Figures
1.2 m Antenna Thermostat Assembly 70048 (Sheet 3 of 3) ................................................................... 259 1.0 m Antenna Heater Assembly 70046 (Sheet 1 of 2) ......................................................................... 261 1.0 m Antenna Heater Assembly 70046 (Sheet 2 of 2) ......................................................................... 263 1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 1 of 5) ....................................................... 265 1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 2 of 5) ....................................................... 267 1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 3 of 5) ....................................................... 269 1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 4 of 5) ....................................................... 271 1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 5 of 5) ....................................................... 273
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List of Drawings and Figures
Page xiv SeaSpace Corporation
Figures by Number 108871-B 56” Radome Installation Arrangement................................................................................ 75 109256-L Radome Base Frame Assembly.............................................................................................35 109337-0 1.2 m/ 1.5 m Dish - System Assembly 4884 ........................................................................ 47 109632-B 1.2 m/ 1.5 m Dish - Radome Installation Model 4884 DBS .............................................. 43 109632-C 1.2 m/ 1.5 m Dish - Radome Installation - Model 4884DBS.............................................49 110677 Stablilzed Antenna Pedestal Assembly Model 4554L ......................................................... 161 110758-B Antenna Control Unit (ACU) Assembly. Chassis Wiring Diagram 4884L .................. 235 110759-A Logic Board Assembly.........................................................................................................241 110942-B ACU Motor Driver Board Schematic ................................................................................. 239 111168 AZ Yoke Assembly................................................................................................................... 197 111365 144” Radome Assembly............................................................................................................. 79 111406-0 1.2 m/ 1.5 m Dish - 72” Radome Assembly ........................................................................ 45 111419-0 Motor Driver Board Assy..................................................................................................... 237 111596A Elevation Pan Assembly ....................................................................................................... 141 112226 ACU PCB Schematic ................................................................................................................ 215 112228 ACU PCB Assembly................................................................................................................. 213 112572 TAC-92 General Assy............................................................................................................... 223 112654-B TAC-92 - Fan Out Schematic ............................................................................................... 221 112909-C TAC-92 ................................................................................................................................... 211 113214 Antenna SchematicModel 3.0 m SAR-120............................................................................. 147 113217 3.0 m Equipment Frame Assembly ........................................................................................ 205 113218 AZ Yoke/Spindle Assembly - 3.0m ....................................................................................... 143 116536 General Assembly 3.0 m Model SAR-120 ............................................................................. 157 1240-07121 Antenna Cabling - ACU - HR100/HR200 ....................................................................... 69 12549xxx and 12855xxx TeraScan 1.2 m (48”) and 1.5m (60") Polar Satellite Tracking Antenna - Radome Enclosed ..................................................................................................... 5 12551xxx TeraScan 1.0 m (39”), Polar Satellite Tracking Antenna - Radome Enclosed .................. 7 12580xxx TeraScan 3.0 m (120”), Polar Satellite Tracking Antenna - Radome Enclosed ................9 12763xxx Polar Tracking Feed/LNA .................................................................................................. 177 12799001 SCD Feed/LNAs................................................................................................................... 179 70044 Webb Clamp................................................................................................................................ 247 70046 (Sheet 1) 1.0 m Antenna Heater Assembly ............................................................................. 261 70046 (Sheet 2) 1.0 m Antenna Heater Assembly ............................................................................. 263
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Figures by Number
70047 (Sheet 1) 1.0 m Antenna Thermostat Assembly ..................................................................... 265 70047 (Sheet 2) 1.0 m Antenna Thermostat Assembly ..................................................................... 267 70047 (Sheet 3) 1.0 m Antenna Thermostat Assembly ..................................................................... 269 70047 (Sheet 4) 1.0 m Antenna Thermostat Assembly ..................................................................... 271 70047 (Sheet 5) 1.0 m Antenna Thermostat Assembly ..................................................................... 273 70048 (Sheet 1) 1.2m Antenna Thermostat Assembly ...................................................................... 255 70048 (Sheet 2) 1.2m Antenna Thermostat Assembly ...................................................................... 257 70048 (Sheet 3) 1.2m Antenna Thermostat Assembly ...................................................................... 259 70221 (Sheet 1) Antenna Repair Kit .................................................................................................... 127 70221 (Sheet 2) Antenna Repair Kit .................................................................................................... 129 70221 (Sheet 3) Antenna Repair Kit .................................................................................................... 128 70407 (Sheet 1) 1.2 m Antenna Heater Coil........................................................................................ 249 70407 (Sheet 2) 1.2 m Antenna Heater Coil........................................................................................ 251 70407 (Sheet 3) 1.2 m Antenna Heater Coil........................................................................................ 253 70928 Antenna Cabling Integrated Feed/LNA/DC .......................................................................... 51 70928005 Integrated Feed/LNA/DC for HRPT/DMSP.................................................................... 53 70928006 HRPT Feed/LNA/DC .........................................................................................................183 70928007 Integrated Dual HRPT/DMSP Feed/LNA/DCs ............................................................ 187 70928008 Dual Feed Block Diagram.................................................................................................... 189 70928009 Power Injector ....................................................................................................................... 193 70928010 HRPT Feed/LNA/DC .........................................................................................................185 70929 Integrated Feed/LNA/Downconverter on a 1.5 m Antenna ................................................ 59 70930 Antenna Schematic SeaTel 1.5 m with Integrated Feed/LNA/DC .................................... 145 70931 General Assembly 1.5 m Model SAR60................................................................................... 159 70973 1.0/1.2/1.5/3.0 m Antenna and Related Hardware Drawing............................................... 13 70973020 Stepper Motor ....................................................................................................................... 130 70973021 Azimuth Pot ..........................................................................................................................131 70973022 Elevation Pot ......................................................................................................................... 132 800-07015 HRPT or HRPT/WEFAX Antenna Cabling — Feed & Downconverter....................... 55 800-07024 1.2m/ 1.5m Dish Antenna Assembly - 1.85 m (72”) Radome......................................... 41 800-07025 Antenna Assembly 56” Radome ......................................................................................... 73 800-07036 1.0 m Antenna Pedestal ........................................................................................................ 31 800-07050 Shipboard Antenna Alignment — 1.0m/1.2m Antennas Only...................................... 29 800-07070 Antenna Cabling - HRPT/WEFAX + DMSP..................................................................... 57 800-07072 HDD-100 Downconverter Connector................................................................................. 65 800-07100 Gyro Frame Top View ........................................................................................................ 171 800-07125 ACU & SeaSpace Downconverter on SeaTel Antenna .................................................... 63 800-07126 TAC-92 and SeaSpace Downconverter on SeaTel Antenna............................................ 61 800-07128 Antenna Schematic 4884L/4084L ..................................................................................... 149 800-70212001 Pedestal - 1.2 m (48”)1.5 m (60").................................................................................... 27 802-07127 Antenna Cabling - TAC-92 - HR100/HR200..................................................................... 67
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1 Introduction 1.1. Purpose of this Manual This manual is used in the operations, diagnosis, and repair of the TeraScan 1.0 m (39") model 1084, 1.2 m (48") model 4884, 1.5 m (60") model SAR 60, and 3.0 m (120") model SAR 120 Polar Satellite Tracking Antennas (hereafter called the tracking antenna). All antennas are identical in construction, assembly, diagnostics and repair, unless noted. The manual covers the various antenna mountings and reception capabilities. This manual is written for use by both the system operator and the repair technician.
1.2. What's Covered in this Manual Section 2 3 4 5 7 8 9 10
Contents Description Assembly Startup Operation Fault Isolation Repair Procedures Configurations Appendices
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Introduction
1.3. Related Documents Note: SeaSpace part numbers are shown in brackets [ ] (as in [12719003]). A series of the same part is shown as [12719xxx]. [90200001]
Installation and Operation Manual SeaTel Model TAC-92 Tracking Antenna Controller.
1.4. Conventions Used in this Manual Throughout this manual, you will find examples and steps in which you are instructed to enter UNIX commands. These commands are shown on a separate line in bold courier type at a command-line prompt (such as %). To enter a command, type in the bold letters, then press the Return (or Enter) key. Throughout this manual, we have placed at the end of a command line to indicate that you are to press the Return (or Enter) key. Some commands include variable arguments shown in italic courier type. A variable argument is a placeholder that you must replace with a specific value. For example, in the command, sunalign chain, you must substitute chain with the number of a specific telemetry chain.
Page 2 SeaSpace Corporation
Introduction
1.5. Differences in Software Between TeraScan Versions 3.0 and 2.6 In TeraScan version 2.6 and earlier versions, environment variables were used to define the hardware serial port and type of device. In TeraScan 3.0, all definitions are moved to the file $PASSDIR/system.config. Most of the hardware definitions are found in the [antenna-x] family, [nav-x] family, or the [system] family. The following is a list of files and variables in each version of TeraScan software.
Settings and Variables: [TeraScan 3.0]
[TeraScan 2.6]
Settings in system.config
Environment Variables
Family [system] ups.device
UPS
ups.type
UPS_TYPE
gps.device
TKCLOCK
gps.index
TKCKTP
gps.data.source
NAVDIR
gps.assoc.chain
none
Family [nav-1] nav.device
HEADPORT0
nav.type and
COMPASS_TYPE0
nav.baudrate nav.msgfmt
NMEA_MSG_FMT0
Family [nav-2] nav.device
HEADPORT1
nav.type and
COMPASS_TYPE1
nav.baudrate nav.msgfmt
NMEA_MSG_FMT1
Family [antenna-index] antenna.device
TKPORT00
antenna.type (Antenna index defined in [chain])
none
[chain] down_converter
$PASSRSVP/tkconfigX
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 3
Introduction
The TeraScan 3.0 settings and TeraScan 2.6 environment variables are shown as in the following example: [TeraScan 3.0]:
/ [TeraScan 2.6]:
“[nav-1]nav.type=fixed”/COMPASS_TYPE0=4000
Note:
COMPASS_TYPE0 is redefined as “[nav-1] nav.type”+”[nav-1] nav.baudrate”. “nav.baudrate” is only used when a serial port supplies data for NMEA ship heading.
Differences in software are noted in the manual as: [TeraScan 2.6]: commands for TeraScan 2.6 here [TeraScan 3.0]: commands for TeraScan 3.0 here
Files: [TeraScan 3.0]
[TeraScan 2.6]
$PASSDIR/system.config
$PASSDIR/antenna/acctelems $PASSDIR/antenna/tkconfig0 $PASSDIR/tscan.login $PASSDIR/tscan.antenna
$REFDATA/config/antenna.config
none
$PASSDIR/antenna/antenna.calib
none
$PASSDIR/last_location
$PASSDIR/last_location
Telemetry Chains and Antenna Units: In TeraScan 3.0, an antenna is identified by its associated telemetry chain. The chain number is origin 1 and is passed to each function. In TeraScan 2.6, the antenna unit and framer acc number (origin 0) were passed to each function. The examples in this manual show the L-band or L-band and S-band antenna associated with unit 0. For TeraScan 3.0, the L-band and S-band unit numbers will vary depending on the system configuration. You can see what the chain telemetry association is by typing: ac ?
Page 4 SeaSpace Corporation
Introduction
Figure 1: TeraScan 1.2 m (48”)[12549xxx] and 1.5 m (60") [12855xxx] Polar Satellite Tracking Antenna - Radome Enclosed TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 5
Introduction
Page 6 SeaSpace Corporation
Introduction
Figure 2: TeraScan 1.0 m (39”) Polar Satellite Tracking Antenna [12551xxx]- Radome Enclosed TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 7
Introduction
Page 8 SeaSpace Corporation
Introduction
Figure 3: TeraScan 3.0 m (120") Polar Satellite Tracking Antenna [12580xxx]- Radome Enclosed TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 9
Introduction
Page 10 SeaSpace Corporation
2 Description 2.1. Technical Description The 1.0 m (39”)/1.2 m (48”)/1.5 m (60")/3.0 m (120") tracking antenna subsystem provides realtime data acquisition of satellites in a polar orbit. The antenna consists of the following components as shown in drawing 70973 on page 13.
Outside Equipment a.
1.0 m (39”), 1.2 m (48”), 1.5 m (60"), or 3.0 m (120") parabolic dish.
b.
Tracking positioner. The tracking positioner is self-leveling in some configurations and controlled by the TeraScan Software. The 1.5 m and 3.0 m antennas are for land use only.
c.
Feed with preselector filter and integrated low noise amplifier (LNA)
d. Combine filter and downconverter (DC) for one or two telemetries.
Or e.
Integrated feed, preselector, LNA, and downconverter with power injector.
f.
Radome to protect the antenna.
g.
Cable from inside equipment to the antenna, containing control, power and signal lines.
h.
Optional: built-in heater for continuous cold weather use.
i.
Optional: dual telemetries acquisition.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 11
Description
Inside Equipment a.
Power supply for antenna downconverter. This supply is usually housed in the receiver chassis.
b.
Antenna controller (inside equipment) with gyro compass interface for shipboard use. (The gyro compass interface is optional).
c.
Software to drive the tracking positioner and select the telemetry stream to be received with the antenna.
d. Optional: NMEA-0183 software heading for shipboard use.
The antenna can be configured for a variety of uses: •
It can be permanently mounted on a land pedestal (fixed site).
•
It can be permanently mounted on a ship pedestal.
The tracking antenna can be used to receive: •
HRPT telemetry from NOAA/TIROS series satellites (L-band) and
•
WEFAX data from geostationary satellites (L-band) and
•
RTD telemetry from DMSP series satellites (S-band) and
•
SCD telemetry from SCD series satellites (S-band)
One, two, or three telemetries can be attached to a receiver. If two or more telemetries are used, one downconverter is turned off and the other downconverter is turned on during a pass. Both downconverters are housed in one case.
Page 12 SeaSpace Corporation
Description
1.0/1.2/1.5/3.0 m Antenna and Related Hardware Drawing (70973) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 13
Description
Page 14 SeaSpace Corporation
Description
2.2 Physical Description 2.2.1. Environment Outside Equipment - Operating Limits Humidity
0-100% @ 40 °C
Rain
Driving, up to 10 cm (4") hour
Temperature
Without heater:
-30 ºC (-22 ºF) to 60 ºC (140 ºF)
With Heater:
-40 ºC (-40 ºF) to 60 ºC (140 ºF)
Wind
Permanent/fixed: 45 m/s (100 mph) (161 km/hr) (87 knots)
Vibration
Withstand externally imposed vibrations in horizontal and vertical directions according to the following table: Frequency
Single Peak Amplitude
(0.2 oct/min) mm (inches) 4
- 10 Hz
2.54 (0.100")
10 - 15 Hz
76 (0.030")
15 - 25 Hz
0.41 (0.016")
25 - 33 Hz
0.23 (0.009")
Corrosion
All parts are manufactured from corrosion-resistant materials or treated to endure effects of salt air and salt spray.
Icing
Ice loads up to 22 kg/m2 (4.5 lbs per square foot).
Outside Equipment - Storage Limits humidity
0-100%
temperature
-30 ºC (-22 ºF) to 60 ºC (140ºF)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 15
Description
2.2.2. Mechanical Description Dimensions
1.2 m (48”)/1.5 m (60") antenna: 1.85 m (73”) diameter x 1.85 m (73”) high. (The same radome is used with the 1.2 m (48") and the 1.5 m (60") antennas.) 1.0 m (39") antenna: 1.42 m (56") diameter x 1.47 m (58") high. 3.0 m (120") antenna: 3.7m (144") diameter x 4.1 m (160") high.
Power
90-132 or 190-264 VAC, 47-63 Hz, 400 watts maximum
2.2.3. Tracking Positioner Description 2.2.3.1. Stabilization System (1.0m/1.2m Antennas Only) Type:
four - axis (elevation, azimuth, roll, pitch)
Stabilization Method:
direct mechanical with two gyros
Stabilization Range:
+ 40 degrees roll/pitch above 5 degree elevation
Azimuth Transducer:
1 k potentiometer
Elevation Transducer:
5 k potentiometer
Azimuth/Elevation Drive Motors: 4-pole stepper type, 11.2 VDC 0.44 Amps and 25.5 ohms per winding Ship Motions Roll:
± 30° in 6 - 12 second periods
Pitch:
± 30° in 6 - 12 second periods
Yaw:
± 3° in 15 - 20 second periods
Surge:
± 0.2 g
Sway:
± 0.2 g
Heave:
± 0.5 g
Tangential Acceleration:
± 0.5 g
Turning:
6 deg/sec @ 5 deg/sec/sec
Headway:
30 knots
Mounting Height:
up to 45 m (150 ft)
Page 16 SeaSpace Corporation
Description
2.2.3.2. Positioning System degrees of freedom:
two (elevation, azimuth)
elevation range:
0 to 90° on 1.0 m shipboard 0 to 180° on 1.2 m/1.5 m land-based 0 to 90° on 1.2 m shipboard
azimuth range:
± 265° from ship's heading
El/Az tracking rate:
6 deg/sec
2.2.3.3. 3.0m Antenna Tracking Pedestal Pedestal Performance azimuth range:
±270° for 540 degrees total azimuth; travel from mechanical limit to mechanical limit
elevation range:
0 to 90°
azimuth slew speed:
approximately 9 deg/sec, with targeting speeds slightly higher
elevation slew speed:
approximately 9 deg/sec, with targeting speeds slightly higher
absolute position accuracy:
±1 degree
position repeatability:
±0.5 degree
acceleration:
5 deg/sec2
Antenna Performance diameter:
3.0 meters (120 inches)
gain:
32 dB minimum at 1.7 GHz
F/D:
0.34
focal distance:
1080 mm (42.51 inches)
Radome Specifications radome attenuation:
less than 0.4 dB at 1.7 GHz
number of panels:
13, including six lower, six upper, and one top "hat"
number of legs:
six, each 18 inches tall
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 17
Page 18 SeaSpace Corporation
SHIPBOARD
LAND, FIXED
Where is Antenna Located?
Gyro, synchro 1:1 or 36:1 NMEA Message nmea+baudrate/200X (7)
True North
True North
gyro 1 1/004
gyro 360/003
Gyro, synchro 360:1
True North
gyro sbs/002
fixed/4000
Gyro, Step-by-Step
None
“[nav-1]nav.type”/ COMPASS_TYPE0 Set to: (4)
True North
True North
Orientation
Heading Data
Diagnostic Commands (5) (8)
1. sunalign 2. autoalign fine
1. sunalign 2. autoalign fine
1. sunalign + align 1. sunalign 2. autoalign 2. autoalign fine
shipheading (6) 1. sunalign 2. autoalign
shipheading (6) 1. sunalign 2. autoalign
1. sunalign 2. autoalign fine
1. sunalign + align 1. sunalign 2. autoalign 2. autoalign fine
Alignment Commands (3) (8)
shipheading (6) 1. sunalign 2. autoalign
Command Calibration to Set Procedure Shipheading
Table 1: SUMMARY OF ANTENNA TYPES AND SETUP ACTIONS
Description
Description
Notes on the Antenna Type Table 1.
Not all commands can be run at any time, i.e.,
sunalign can only be run during daylight hours autoalign can only operate while a pass is being received 2.
Always make sure the commands whereami and sunclock have been run before aligning the antenna. If a GPS unit is not attached to the system, the location and time must be manually entered using newsite and date.
whereami determines the site location sunclock sets the time on the computer 3.
Only one of the commands in the alignment column needs to be executed to align the antenna. The antenna does not need to be realigned unless moved or repaired.
4.
If multiple polar tracking antennas are part of the system, all antennas must have the same “[nav-1] nav.type”/COMPASS_TYPE0 and must all be calibrated and aligned the same way.
5.
Commands in the diagnostic column are used to verify that the previous alignment is correct or to make minor adjustments.
6.
The shipheading command is used only by an antenna on board a ship that uses a step-bystep interface.
7.
An antenna that uses NMEA messages for its heading must have the “[nav-1] nav.type”/ COMPASS_TYPE0 set based on the baud rate of the message transmission:
“[nav-1] nav.type”/COMPASS_TYPE0 = 2001: 2002: 2003: 2004: 2005:
2400 baud 4800 baud 9600 baud 19200 baud 38400 baud
8.
Continuous acquisition must be disabled using safe_ant before running of these commands.
9.
To determine system compass type, enter: [TeraScan 2.6]: % ac 0
[TeraScan 3.0]: % ac 1
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 19
Description
Page 20 SeaSpace Corporation
3 Assembly 3.1. Tracking Antenna Site Preparation 3.1.1. Tracking Antenna Site Selection HRPT/RTD/WEFAX/SCD Antenna In selecting a location to install the HRPT/RTD/WEFAX/SCD antenna, the following factors should be considered: a.
Antenna Mask — The antenna’s reception may be blocked by nearby buildings, equipment, and hills. The farther the antenna is placed from these, the closer to the horizon data can be taken. On occasion, the antenna must be blocked in one direction and will have unlimited viewing in all other directions. At low elevations, every 1° of elevation reduces the distance from the antenna for which data can be received by approximately 100 km. Even if the antenna’s reception is blocked for part of a pass, the antenna will still point in the direction of the satellite and track it even if data is not being received.
b.
Site Levelness — The antenna should be placed on a firm platform that is approximately level. The platform should not be sloped more than 5° in any direction. The area should be at least 4 m (12’) (6m (20’) for 3.0m) square to allow room for the antenna base and still allow people to be able to work safely around the antenna.
c.
Signal Noise — The antenna should be placed so that it is not in the path or cone of any high-power transmitter or radar. High-power radar can destroy the low-noise amplifier (LNA) on the antenna.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 21
Assembly
3.1.2. Antenna Cable Conduit Run for a Permanent/Fixed Site When the antenna is permanently mounted, the control/power cable connecting it to the inside equipment should be run in a metal conduit. This conduit provides the best mechanical and electrical interference protection. Also, the cable should be physically separated from all sources of electrical interference, such as power cables. The conduit should have a minimum diameter of 7.6 cm (3 inches) with a sweep radius of not less than 91 cm (36”). If a sweep is not suitable, provide a pull box instead.
3.1.3. Heater Cable Conduit Run for a Permanent/Fixed Site When the antenna is permanently mounted and will be operated in below-freezing temperatures where formation of ice may occur, a thermostatically controlled heater is recommended inside the antenna radome. The power to the heaters must be supplied in a separate conduit to the radome. The conduit should have a minimum diameter of 2.54 cm (1”). The power conduit should be mechanically separated from the antenna cable. A 15-Amp circuit at 120 VAC or a 10-Amp circuit at 220 VAC should be provided.
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Assembly
3.1.4. Pedestal Construction for a Permanent/Fixed Site A pedestal for shipboard or permanent land use must be constructed to support the tracking antenna. Usually it is made of aluminum or steel and is powder-coated or galvanized. The pedestal must be constructed to meet the following wind load design limits.
Table 3-1: Design Limits
[12551xxx]
[12549xxx]
[12825xxx]
[12580002]
Antenna
1.0 m (39”) dish 1.2 m (48”) dish 1.5 m (60”) dish 3.0 m (120") dish 1.44 m (56”) radome 1.85 m (72”) radome 1.85 m (72”) radome 3.7 m (144") radome
Radome Weight (Empty)
23 kg (50 lbs)
41 kg (90 lbs)
41 kg (90 lbs)
204 kg +152 kg (450 lbs) + (335 lbs) base frame
Vertical Dead Load (Antenna + Radome)
62 kg (135 lbs)
131 kg (290 lbs)
131 kg (290 lbs)
454 kg (1000 lbs)
Horizontal Wind Shear
103 kg (227 lbs)
319 kg (703 lbs)
319 kg (703 lbs)
712 kg (1566 lbs)
2845 Nm (2100 ft-lbs)
2845 Nm (2100 ft-lbs)
15731 Nm (11612 ft-lbs)
N/A
289 kg (636 lbs)
742 Nm Overturning Moment Referred to (548 ft-lbs) bottom of radome Vertical Lift, Each Leg
N/A
N/A
Bolt Torque
1/2": 88-115 Nm (65-85 ft-lbs)
1/2": 88-115 Nm 5/8": 183-223 Nm 5/8": 183-223 Nm (135-165 ft-lbs) (65-85 ft-lbs) (135-165 ft-lbs) 3/8": 24-27 Nm 3/8": 24-27 Nm (25-35 ft-lbs) (25-35 ft-lbs)
Resonant Frequency
3 - 4 Hz
3 - 4 Hz
3 - 4 Hz
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 23
Assembly
3.1.4.1. Antenna Pedestal Construction - 1.85 m (72”) Radome - 1.2 m/1.5 m Dish Drawing 800-70212001on page 27 is an example of a pedestal that mounts on a building or a ship.
Radome Description The antenna radome is constructed of two halves of fiberglass joined together at the sides and top. The radome is bolted to the pedestal by six galvanized angles and two flat strips. The antenna support post bolts to the pedestal through four 16 mm (5/8”) diameter bolts. See drawing 800-07024 on page 41.
Radome Orientation The radome is mounted with the access hatch facing to the south (or stern of a ship); the antenna support post’s opening also faces south. The cable enters the radome to the right of the access hatch. See drawing 800-07024 on page 41.
Pedestal An example of one type of pedestal is shown in drawing 109632-B on page 43. Any railing around a pedestal that is over 0.6 m (2 feet) high will affect the incoming signal at the horizon. See drawing 109632-C on page 49. Other types of pedestals can be constructed as long as: 1.
The bolt hole patterns shown in drawings 109632-C on page 43, 111406-0 on page 45, and 109337-0 on page 47, are accessible underneath the pedestal using common hand tools.
2.
The radome overturning moment shown in Table 3-1 on page 23, is met. Because the holes in the outer rim around the radome are not precisely placed, bolts should be used. Studs are not recommended. The bolt holes should be match-drilled as the radome is installed. See section 3.2.1.2.(i) on page 38.
Ladder If the antenna pedestal is over 1 m (3’) high, a permanent ladder attached below the access hatch should be provided. This will simplify construction and provide access for servicing.
Page 24 SeaSpace Corporation
Assembly
3.1.4.2. Antenna Pedestal Construction - 1.44 m (56”) Radome - 1.0 m Dish Drawing 800-07036 on page 31 is an example of a pedestal that mounts on a building or ship.
Radome Description The antenna radome is constructed of 2 halves of fiberglass joined together by a clamp. The cap of the radome can be removed for servicing the antenna. The radome is bolted to the mounting pedestal using four bolts 12.5 mm (1/2”) in diameter. The four bolts also attach to the base of the antenna support post. See drawings 800-07025 on page 73 and 108871-B on page 75.
Radome Orientation The radome is mounted with the access hatch facing to the south (or stern of the ship). The cable enters the radome to the right of the access hatch. See drawings 800-07025 on page 73 and 108871-B on page 75.
Pedestal An example of one type of pedestal is shown in drawing 108871-B on page 75. Other types of pedestals can be constructed as long as: a.
The bolt hole patterns shown in drawing 108871-B are accessible underneath the pedestal using common hand tools, and
b.
The radome overturning moment shown in Table 3-1 on page 23 is met.
Ladder If the antenna pedestal is over 1 m (3’) high, a permanent ladder attached below the access hatch should be provided. This will simplify construction and provide access for servicing.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 25
Assembly
Page 26 SeaSpace Corporation
Assembly
Pedestal - 1.2 m (48”)1.5 m (60") [800-70212001] TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 27
Assembly
Page 28 SeaSpace Corporation
Assembly
Shipboard Antenna Alignment -- 1.0m/1.2m Antennas Only (800-07050) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 29
Assembly
Page 30 SeaSpace Corporation
Assembly
1.0 m Antenna Pedestal (800-07036) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 31
Assembly
Page 32 SeaSpace Corporation
Assembly
3.1.4.3 Antenna Pedestal Construction 3.7 m (144") Radome 3.0 m Dish Radome Base Frame and Legs Drawing 111365 on page 79 shows 46 cm (18") high legs mounted on the base of the radome. Normally, a pedestal does not need to be constructed below these legs. The leg mounting is shown on drawing 109256 on on page 35.
Radome Orientation The radome base should be oriented on a True North-South line as accurately as possible (within one degree of True North). The radome is usually oriented so the hatch is on the southern side of the radome.
3.1.5. Antenna Orientation (Land-Based or Shipboard Mounting) All antennas are mounted so that when the antenna azimuth is 360° (0°) the antenna will be pointing True North. If the antenna is mounted on a ship, it must be aligned so that a reading of 0° is pointing in the direction of the ship’s travel (bow) and a reading of 180° is toward the stern. See drawing 800-07050 on page 29.
3.1.6. Installation Equipment Required During installation, the following equipment or facilities must be provided. 1.
110 VAC/220 VAC at the antenna for drilling holes in the pedestal.
2.
Temporary ladders to reach:
3.
a.
the top of the pedestal, and
b.
the top of the radome (used while joining the radome halves together)
A crane or hoist to lift the assembled radome into position. This equipment may not be needed, depending upon the location of the antenna. A sling (provided by SeaSpace) is placed around the radome to lift it.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 33
Assembly
Page 34 SeaSpace Corporation
Assembly
Radome Base Frame Assembly (109256-L) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 35
Assembly
Page 36 SeaSpace Corporation
Assembly
3.2. Tracking Antenna Assembly 3.2.1. Antenna Assembly - 1.2m (48”) /1.5m (60”) Antenna, Permanent/Fixed
!
Warning
DO NOT TURN ON POWER TO ANY EQUIPMENT UNTIL ALL ASSEMBLY IS COMPLETE.
3.2.1.1. Antenna Orientation On Land During installation of the antenna, care must be taken to align the antenna so it points as closely as possible to true north. This means that the center screw terminal strip at the base of the antenna should face true south. See drawing 800-07024 on page 41.
Shipboard The antenna must be mounted so that the antenna base plate is aligned parallel to the center line of the ship so that when the ship’s compass reads 0° (true north), the antenna’s azimuth is 360°. See drawing 800-07050 on page 29.
3.2.1.2. Antenna Mounting and Radome Assembly At the installation site, perform the following steps. See drawing 800-07024 on page 41: a.
Position the support post on the two 1 m galvanized strips. Bolt the antenna support plate to the galvanized strips using the 1/4-20 x 5/8” bolts and oversize washers supplied.
b.
Place the radome half containing the hatch so that the wires coming out of the antenna support post line up with the penetration holes in the radome.
c.
One person tips the support post slightly and two people slide the radome half under the two galvanized strips. Slide the radome so that the bottom edge of the radome is under the center of the antenna support post.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Assembly
d. While one person reaches in through the radome hatch and tips the post back, slide the front half of the radome (without the hatch) in place. e.
Apply silicon adhesive between the two radome halves.
f.
Line up the two halves of the radome as best as possible. Starting at the bottom on both sides, temporarily clamp the two radome halves together with clamps approximately every 0.5 m (20”).
g.
Using the 6 m long white plastic U-section band (Strip-Lock), and with one person inside the radome to provide support, press the Strip-Lock onto the seam starting at the bottom.
h.
To prevent the platform from falling over while the radome is lifted into place, install the four steel clips (angle brackets) with the 1/4” x 5/8” bolts in the tapped holes which are located near the ends of the galvanized strips. Locate the red 2” x 4” pieces of lumber (about 0.6 m long) and drill and mount them to the clips mounted on the galvanized strips.
i.
Once the radome is fully assembled, match drill through the outer holes in the galvanized strips into the deck or mounting plate and fasten securely with 3/8” diameter bolts. Place the six 30 cm long galvanized angles and drill and fasten to the deck or mounting plate with 3/8” diameter bolts around the sides of the radome as shown in drawing 109631-C on page 49.
j.
Match drill the four 5/8” diameter holes on the antenna support post and attach the support post to the deck or mounting plate using 5/8” diameter bolts.
Note:
All bolts and nuts should be assembled using Locktite 242.
3.2.1.3. Removal of Antenna Shipping Blocks Carefully remove all of the wooden shipping blocks and packaging materials/tie-downs that protect the antenna support pedestal. Remove the two red blocks and mounting clips from the radome. The antenna weights must be adjusted to balance the antenna. See section 8.2.22. starting on page 202 for this procedure.
3.2.1.4. Antenna Cabling to Inside Equipment 3.2.1.4.1. Wiring Separate Feed and Downconverter The cable entering the radome must be wired as shown in drawing 800-07015 on page 55. The cable must be inserted through the cable feed-through in the radome side. Then silicone or RTV or similar material is applied to the feed-through to make it water tight. a.
The downconverter power and status wire (cable bundle D) must be attached according to drawings 800-07127 on page 67, 800-07126 on page 61, and 800-07072 on page 65.
b.
Cable bundle A is connected to the two terminal strips, labeled TB1 or TB1 & TB2, mounted on the base of the support post. The wire number assignment for cable bundle A is shown in drawing 800-07127 on page 67.
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Assembly
c.
The coax cable bundle E should be fitted with the correct connector and connected to the coax cable which emerges from the bottom of the antenna support post.
d. The cable bundles A, D, and E must be routed from the outside equipment to the vicinity of the inside equipment group. The cables must be handled with care to prevent damage. When pulling the cables in place, avoid sharp bends, kinking, and the use of excessive force. The cable must be supported by a strain relief on any long vertical drop of over 6 m (20”). After placement, seal the deck or building penetration and tie the cables securely.
Note: e.
Maintaining the shortest possible cable run is important due to the losses in the coax cable which can severely reduce signal quality.
Cable bundle A connects to the terminal strips which are mounted inside the back of the receiver chassis. See drawing 800-07127 on page 67.
3.2.1.4.2. Wiring Integrated Feed/LNA/Downconverter The cable entering the radome must be wired as shown in drawing 70928 on page 51 or 70928005 on page 53. The cable must be inserted through the cable feed-through in the radome side. Silicone, RTV, or similar material must then be applied to the feed-through to make it water tight. a.
The power injector must be attached according to these drawings: Antenna Cabling - TAC-92 - HD100 800-01217 on page 67. and Integrated Feed/LNA/Down Converter on a 1.5 m Antenna 70929 on page 59.
b.
Cable bundle A is connected to the two terminal strips labeled TB1 or TB1 and TB2 on the base of the support post. The wire assignment for cable bundle A is shown in drawing 800-07127on page 67.
c.
The coax cable bundle E should be fitted with the correct connector and connected to the coax cable which emerges from the bottom of the antenna support post.
d. The cable bundles A, D, and E must be routed from the outside equipment to the vicinity of the inside equipment group. The cables must be handled with care to prevent damage. When pulling the cables in place, avoid sharp bends, kinking, and the use of excessive force. The cable must be supported by a strain relief on any long vertical drop of over 6 m (20”). After placement, seal the deck or building penetration and tie the cables securely.
Note:
Maintaining the shortest possible cable run is important due to the losses in the coax cable which can severely reduce signal quality.
e.
Cable bundle A connects to the terminal strips which are mounted inside the back of the receiver chassis. See drawing 800-07127 on page 67.
f.
Cable bundle D connects to the receiver. See drawing 70927 on page 59.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 39
Assembly
3.2.1.5. Antenna/Pedestal Mechanical Checklist Steps 2 and 3 are not done on an antenna with a clamp [70044001] in place of the gyro wheels. Steps 2 and 3 are not done for the 1.5 m antenna. 1.
Check that the antenna moves freely in azimuth, elevation, pitch, and roll.
2.
Check that the gyro frame assembly rotates freely on its azimuth bearings.
3.
Check that both gyros spin freely and pivot freely about their precession axes.
4.
Check that the elevation assembly is balanced front-to-back by observing that it remains at any given initial position without moving up or down by itself. See section 8.2.22 starting on page 202 for the procedure to rebalance the antenna.
5.
Check that the azimuth yoke is level side-to-side and that its legs are vertical.
6.
Check that all wiring/cabling is properly dressed and clamped/terminated into place.
3.2.1.6. Gyro Compass Wiring - Shipboard Use (Optional) (“[nav-1] nav.type”/ COMPASS_TYPE0 = 2, 3, or 4) 1.
Step-by-Step: For step-by-step, four wires are needed. Input to the ACU/TAC-92 is 35 to 90 VDC, 6 steps per degree. The four conductors for step-by-step are labeled: COMMON, A, B, C.
2.
Synchro: For 90:1, 180:1, 36:, 1:1, or 360:1 synchro, five wires are needed. Additional electronics are required if the ratio is not 360:1. Input reference voltage range is 90 to 115 VAC. 50, 60, or 400 Hz. The five conductors are labeled R1, R2, S1, S2, S3. The cable should be shielded.
Page 40 SeaSpace Corporation
Assembly
1.2m/ 1.5m Dish Antenna Assembly - 1.85 m (72”) Radome (800-07024) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 41
Assembly
Page 42 SeaSpace Corporation
Assembly
1.2 m/1.5 m Dish - Radome Installation Model 4884 DBS (109632-B) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 43
Assembly
Page 44 SeaSpace Corporation
Assembly
1.2 m/1.5 m Dish - 72” Radome Assembly ( 111406-0) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 45
Assembly
Page 46 SeaSpace Corporation
Assembly
1.2 m/1.5 m Dish - System Assembly 4884 ( 109337-0) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 47
Assembly
Page 48 SeaSpace Corporation
Assembly
1.2 m/ 1.5 m Dish - Radome Installation - Model 4884DBS (109632-C) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 49
Assembly
Page 50 SeaSpace Corporation
Assembly
Antenna Cabling Integrated Feed/LNA/DC (70928) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 51
Assembly
Page 52 SeaSpace Corporation
Assembly
Integrated Feed/LNA/DC for HRPT/DMSP (70928005) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 53
Assembly
Page 54 SeaSpace Corporation
Assembly
HRPT or HRPT/WEFAX Antenna Cabling — Feed & Downconverter (800-07015) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 55
Assembly
Page 56 SeaSpace Corporation
Assembly
Antenna Cabling - HRPT/WEFAX + DMSP (800-07070) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 57
Assembly
Page 58 SeaSpace Corporation
Assembly
Integrated Feed/LNA/Downconverter on a 1.5 m Antenna (70929) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 59
Assembly
Page 60 SeaSpace Corporation
Assembly
TAC-92 and SeaSpace Downconverter on SeaTel Antenna (800-07126) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 61
Assembly
Page 62 SeaSpace Corporation
Assembly
ACU & SeaSpace Downconverter on SeaTel Antenna (800-07125) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 63
Assembly
Page 64 SeaSpace Corporation
Assembly
HDD-100 Downconverter Connector (800-07072) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 65
Assembly
Page 66 SeaSpace Corporation
Assembly
Antenna Cabling - TAC-92 - HR100/HR200 (800-07127) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 67
Assembly
Page 68 SeaSpace Corporation
Assembly
Antenna Cabling - ACU - HR100/HR200 (1240-07121)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 69
Assembly
Page 70 SeaSpace Corporation
Assembly
3.2.2. Assembly 1.0 m (39”) Antenna, Permanent / Fixed
!
Warning
DO NOT TURN ON POWER TO ANY EQUIPMENT UNTIL ALL ASSEMBLY IS COMPLETE. 3.2.2.1. Antenna Orientation During installation of the antenna, care must be taken to align the antenna so it points as closely as possible to true north. This means that the center screw terminal strip at the base of the antenna should face true south. See drawings 800-07025 on page 73 and 800-07050 on page 29.
3.2.2.2. Antenna and Radome Mounting At the installation site, perform the following steps: 1.
Remove the ½-13 nuts located under the wooden shipping pallet that hold the radome to the pallet.
2.
Install the supplied sling around the lower portion of the radome so that the radome is securely supported.
3.
Lift the radome into place and secure it with the hardware that was removed from under the pallet. Be sure to apply Locktite 271 to the studs.
3.2.2.3. Removal of Antenna Shipping Blocks Carefully remove all of the wooden shipping blocks and packaging materials/tie-downs that protect the antenna support pedestal.
3.2.2.4. Antenna Cabling to Inside Equipment The cable entering the radome must be wired as shown in drawing 800-07127 on page 67. The cable must be inserted through the cable feed-through in the radome side. Silicone, RTV, or similar material must then be applied to the feed-through to make it water tight.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 71
Assembly
Page 72 SeaSpace Corporation
Assembly
Antenna Assembly 56” Radome (800-07025) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 73
Assembly
Page 74 SeaSpace Corporation
Assembly
56” Radome Installation Arrangement (108871-B)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 75
Assembly
Page 76 SeaSpace Corporation
Assembly
3.2.2.5 Antenna/Pedestal Mechanical Checklist Steps 2 and 3 are not done on an antenna with a clamp [70044001] in place of the gyro wheels. 1.
Check that the antenna moves freely in azimuth, elevation, pitch and roll.
2.
Check that the gyro frame assembly rotates freely on its azimuth bearings.
3.
Check that both gyros spin freely and pivot freely about their precession axes.
4.
Check that the elevation assembly is balanced front-to-back by observing that it remains at any given initial position without moving up or down by itself. See section 8.2.22 starting on page 202 to rebalance the antenna.
5.
Check that the azimuth yoke is level side-to-side and that its legs are vertical.
6.
Check that all wiring/cabling is properly dressed and clamped/terminated into place.
7.
Close the access hatch.
3.2.3 Antenna Assembly 3.0 m (120") Antenna, Permanent/Fixed 3.2.3.1 Antenna Orientation The antenna is installed with the service light facing south and the downconverter on the north side of the support post. See drawings 111365 on page 79, 116536 on page 157, and 109256 on page 35.
3.2.3.2 Radome Assembly 1.
Select a secure assembly site that provides enough area for working with the large radome panels. Place the radome base pan on temporary support blocks at least 8 cm (20 inches) high.
2.
Assemble the metal support frame (four legs and eight braces) of the radome base using the hardware provided. Loosely assemble all legs and braces, aligning all matching marks before tightening any of the bolts. Ensure that a split washer is used under each nut.
Note:
Unless otherwise indicated, all nuts and bolts should be assembled with Locktite 271 or its equivalent.
3.
Fasten the antenna support stand to the radome base with the four ½-13 x 1¼-inch bolts, ½-inch flat washers, and hex nuts provided.
4.
Position the antenna dish over the four antenna support struts. (The dish and support struts are numbered or color coded. Make sure they match). Insert the four 15⁄ 16-18 x 1-inch bolts and 15⁄ 16-inch flat washers provided and secure the antenna to the support struts.
5.
Attach the four feed support struts to the antenna dish using the ¼-20 x 1½-inch bolts, ¼-inch flat washers (two per bolt), and ¼-20 hex nuts provided.
6.
Attach the feed/LNA unit to the support struts using the ¼-20 x 1½-inch bolts and ¼-inch flat washers provided.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
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Assembly
7.
Observe the painted numbers on the radome panels that clearly identify their positions respective to each other and the base pan assembly. Loosely assemble all panels using the hardware provided. Do NOT tighten the bolts at this time. After the radome is fully assembled, open each seam wide enough to install a good bead of silicone caulk, then firmly tighten all the bolts. (Refer to radome assembly drawing 111365 on page 79.)
Note: In some cases it may be more convenient to first assemble the lower half of the 12-part radome, then install the antenna. This allows more room for working inside the radome and less chance of damaging the antenna or of dripping silicone sealant on the equipment. 8.
Drill a 2 3⁄8 -inch-diameter hole at a desired location in the radome base and attach the supplied strain relief.
9.
Check that the top half of the radome (the dome) fits correctly on the lower half and then apply a good bead of silicone or RTV adhesive (supplied with the radome) between the radome halves and apply V-trim as described in the radome assembly (drawing 111365 on page 79).
10. Set the top half of the radome in place on the bottom half and firmly tighten the bolts.
3.2.3.3 Radome Installation 1.
Hoisting—Using a four-part lifting sling, and with a tag line (supplied by others) attached to the radome base frame, hoist the assembly to its assigned location by means of a suitably sized crane or derrick.
!
Warnings
HOISTING WITH OTHER THAN A WEBBED FOUR-PART SLING MAY RESULT IN CATASTROPHIC CRUSHING OF THE RADOME. THE RADOME ASSEMBLY WEIGHS APPROXIMATELY 1,000 POUNDS. HANDLING EQUIPMENT MUST BE RATED ACCORDINGLY. THE RADOME ASSEMBLY IS VERY LIGHT FOR ITS SIZE AND IS SUBJECT TO LARGE SWAYING MOTIONS IF HOISTED UNDER WINDY CONDITIONS.
2.
Orientation—The radome assembly support legs must be oriented parallel to North to an accuracy of ±1 degrees.
3.
Attachment—Bolt the radome support frame to the roof using suitable mounting hardware. Refer to assembly drawing 109256 on page 35.
Page 78 SeaSpace Corporation
Assembly
144” Radome Assembly (111365)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 79
Assembly
Page 80 SeaSpace Corporation
Assembly
3.2.3.4 Removal of Shipping Blocks Carefully remove all the wooden shipping blocks and the packing materials/tiedowns that protect the antenna.
3.2.3.5 Antenna Cabling to Inside Equipment The cable entering the radome must be wired as shown in drawing 800-07015 on page 55. The cable must be inserted through the cable feed-through in the radome side. Silicone, RTV, or similar material must then be applied to the feed-through to make it water right. a.
The downconverter power and status wire (cable bundle D) must be attached according to drawings 800-07217 on page 67, 800-07126 on page 61, and 800-07072 on page 65. Also, see drawing 113214 on page 147.
b.
Cable bundle A is connected to the two terminal strips, labeled TB1 & TB2, mounted on the base of the support post. The wire number assignment for cable bundle A is shown in drawing 800-07127 on page 67.
c.
The coax cable E should be fitted with the correct connector and connected to the downconverter.
d. The cable bundles A, D, and E must be routed from the outside equipment to the vicinity of the inside equipment group. The cables must be handled with care to prevent damage. When pulling the cables in place, avoid sharp bends, kinking, and the use of excessive force. The cable must be supported by a strain relief on any long vertical drop of over 6 m (20”). After placement, seal the deck or building penetration and tie the cables securely.
3.2.3.6 Antenna/Pedestal Mechanical Checklist 1.
Check that the antenna moves freely in azimuth and elevation.
2.
Check that the elevation assembly is balanced front-to-back by observing that it remains at a given initial position without moving up or down by itself.
3.
Check that all wiring/cabling is properly dressed and clamped/terminated in place.
4.
When operating the system it is necessary that the radome access hatch be closed and secured in place at all times, otherwise wind gusts will disturb the antenna pointing.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 81
Assembly
Page 82 SeaSpace Corporation
4 Startup of the Tracking Antenna 4.1. Switch Settings and Indicator Lights The power switch of the antenna controller (either the TAC-92 or the ACU) must be on before the system power is turned on. The indicator lights listed in this section enable the user to verify proper operating status of the antenna. a.
Antenna HRPT/WEFAX downconverter [70151001] [70151005][70151008] green light:
on off
Downconverter is OK. Downconverter is faulty or there is no power.
HRPT/DMSP downconverter [70151002] green light:
on off
Power is OK. No power, fuse blown.
red light:
on off
HRPT DMSP
Integrated feed/LNA/downconverter: Has no lights.
TeraScan 1.0 m/1.2 m/1.5 m /3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 83
Startup of the Tracking Antenna
b.
Indoor Equipment Antenna Controller (TAC-92) Switches and buttons: AC Power switch: RESET button: Up/down arrows: Actuate switch: Polarization switch:
up=on (on rear of unit) Shows prom verson when pressed. Do not push while tracking is in progress. Use to set heading. Not connected Not connected
SHIP DISPLAYS: LAT: LON: HDG:
Ship’s Latitude. Not used. Ship’s Longitude. Not used. Ship’s Heading. Updated automatically from the gyro compass interface.
SATELLITE DISPLAYS: SAT: THRS: RCVR: AGC:
Satellite Longitude. Not used. Signal Level Threshold. Not used. Receiver tuning or selection. Not used. Signal AGC level. Diagnostic dispolay of signal level. Range is 0 – 4095 for 0 – 5V input. Not used.
ANTENNA DISPLAYS: AZ:
EL:
REL:
Page 84 SeaSpace Corporation
True azimuth position. Displayed in tenths of a degree. Display is sum of ship’s heading and antenna relative position reduced to 0 – 360 degress. Position can be incremented or decremented with up/down keys. Can be targeted to an absolute or relative position by numeric entry. NS/EW key selects relative target mode. Searching light flashes when targeting. Display can be corrected up or down with AZTRIM setting under MODE/SETUP display. Elevation position. Displayed in tenths of a degree. Position can be incremented and decremented with UP/ DOWN keys. Can be targeted to an absolute position by numerica entry. Searching light flashes when targeting. Display can be corrected up or down with ELTRIM setting under MODE/SETUP display Antenna position relative to the bow of the ship. Displayed to tenths of a degree. Range of displayis 90 – 630 with 360 indicating the antenna is pointed at the bow. Used to indicate when the antenna is near an unwrap point and if the antenna is pointing at any large structures on the ship. Diagnostic display only; cannot be selected for entry.
Startup of the Tracking Antenna
POL: AGC:
Polang (Polarization Angle) Position. Not used. Signal AGC level. Diagnostic dispolay of signal level. Range is 0 – 4095 for 0 – 5V input. Not used.
MODE DISPLAYS: The MODE displays are separated into three groups: CONTROL, STATUS, and SETUP. Normally, only the CONTROL and STATUS groups are available. To gain access to the SETUP displays, you must select the STATUS/AZ EL diagnostic display and press 7 9 7 9 Enter. This procedure only needs to be performed once to allow access to the SETUP displays unless power is removed or the TAC-92 is reset. MODE CONTROL DISPLAYS: TRACKING: SEARCHING: STANDBY:
Not used. Not used. Used to place the TAC-92 in a standby mode for service. AC power to the stabilization gyros is turned off and the drive to the DC stepper motors is disabled. UP key selects standby mode. RESET restores normal operation.
MODE STATUS DISPLAYS: ERROR:
AZ EL:
Display of current ERROR status. Error codes and Error LED are cleared by pressing UP key. Error code is the sum of the following errors: 128 Satellite out of range 16 Conscan disk rotation error 2 Wrong sychro converter type 1 Gyro read error Diagnostic display of Azimuth and Elevation A/D readings.
Lights: UNWRAP (red): ERROR (red): SEARCHING (green): TRACKING:
on on off on
when unwrapping antenna. if no valid gyro signals. if valid gyro signals are being received. while antenna is moving into position. not used.
TeraScan 1.0 m/1.2 m/1.5 m /3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 85
Startup of the Tracking Antenna
Antenna Controller (ACU): Switches and Buttons: Power switch: Mode switch:
up = on Auto when operating; Manual when setting ship heading. Reset button: Do not push while tracking is in progress. Up/down: Use to set heading. Elevation/Azimuth/Ship heading: Selects the value entered with the up/down switch. The value is shown on the display. The azimuth value shown is the pointing angle of the antenna relative to true north. Lights: Unwrap (red): Auto (green): Shipheading (red)
on on on off
when unwrapping antenna. when Auto switch is on. if no gyro signals are received. Shipheading is also shown as 900.1 if invalid data continues for 1 minute. if valid gyro signals are being received.
Meters: Signal Strength:
Page 86 SeaSpace Corporation
Not used.
Startup of the Tracking Antenna
4.2. Power-On Sequence When 110 VAC/220 VAC is supplied to the antenna's controller, the tracking positioner will: •
Show the current position of the antenna.
•
On systems with a heater: Supply 110 VAC/240 VAC to the antenna's heater. The heater is controlled by a thermostat inside the radome.
•
On shipboard systems with a gyro: Bring the gyro flywheels up to speed.
4.3. Calibration 4.3.1. Cable Calibration 4.3.1.1. Calibration of the Antenna Cable and System Checkout - TAC-92 Antenna control cable (cable bundle A). This calibration should be done only for the purpose of verifying correct cable calibration. a.
Manual calibration - TAC-92 PROM less than 1.60
!
Warning
110 VAC IS PRESENT AT SOME OF THE SCREW TERMINALS ON THE ANTENNA AND AT THE BACK OF THE RECEIVER CHASSIS.
1.
Press RESET on the TAC-92 ACU.
2.
Press the MODE button until AZ XXXX EL nnnn appears.
3.
Locate the azimuth pot signal wire at pin 9 on the screw terminal strip at the antenna pedestal inside the radome. Remove the wire from pin 9.
4.
Connect the wire from pin 9 to pin 12 on the screw terminal strip.
TeraScan 1.0 m/1.2 m/1.5 m /3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 87
Startup of the Tracking Antenna
5.
Note that the value shows next to EL, for example: EL 4084
6.
Press 7, 9, 7, 9, ENTER on the TAC-92 front panel.
7.
Enter the value shown in step 5 on the TAC-92 keypad, for example: 4 0 8 4 ENTER
8.
The display should read the value from step 5, for example: A/D CAL 4084
9.
Press ENTER until SAVE NEW PARAMETERS appears on the display. Press the Up arrow (^). Press ENTER until the SEA TEL logo appears.
10. Reconnect the wire from pin 9 back to the screw terminal 9 on the screw terminal strip. 11. Press RESET on the TAC-92 front panel. b.
Automatic Calibration—TAC-92 PROM 1.60 or greater
Note:
This calibration procedure is for antennas that have a travel of 180 degrees elevation. This procedure automatically adjusts the ELSCALE and AZSCALE parameters of the TAC-92 to compensate for losses in the control cable. This procedure must be done after installation to guarantee accuracy of position readout.
1.
Press RESET on the TAC-92 front panel.
2.
Press the MODE button until AZ XXXX EL nnnn appears on the display.
3.
Press 7, 9, 7, 9, ENTER on the TAC-92 front panel.
4.
Press the MODE button until ELSCALE is displayed.
5.
Press 8, 2, 9, 2.
6.
Press ENTER until AZSCALE is displayed.
7.
Press 4, 1, 9, 0.
8.
Press ENTER until SAVE SETUP PARAMETERS is displayed.
9.
Press the UP arrow key ().
10. Press ENTER to save the default scale parameters. 11. Press the ANTENNA key twice to select the azimuth (only) display. 12. Press 6, 2, 0, N/S, ENTER. This should cause the antenna to move to 620 relative azimuth. 13. Press the ANTENNA button to select the elevation (only) display. 14. Press 9, 0, ENTER. This should cause the antenna to move to 90° elevation. 15. Wait for the antenna to stop moving (SEARCHING light goes off). If the SEARCHING light is still flashing when the antenna stops moving, press RESET. 16. Press the MODE button until AUTO CAL is displayed.
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Startup of the Tracking Antenna
17. Press the UP arrow button () and ENTER to start the calibration process. The display will count down from 3000 to 0000. 18. When the countdown has completed, press the MODE button until AZ xxxx EL nnnn appears. 19. Press 7, 9, 7, 9, ENTER. 20. Press ENTER until SAVE SETUP PARAMETERS is displayed. 21. Press the UP arrow button (). 22. Press ENTER to save AZSCALE and ELSCALE. 23. Record the new settings in the TAC-92 ( see Section 8.2.36, page 228).
Note: c.
If the Unwrap and Error lights turn on or the error value is 64, the antenna was not moved to azimuth 620° or elevation 90° before starting AUTO CAL.
ACU/Antenna System Checkout—TAC-92 1.
Turn on the main power switch on the front panel of the TAC-92 ACU.
2.
Press the RESET button on the TAC-92 ACU front panel to initialize the system.
3.
At the antenna, observe that the gyro flywheels are spinning. With a strobe tachometer, observe that the flywheels’ spin speed is approximately 3400-3500 rpm for 60 Hz and 2900-3000 rpm for 50 Hz AC power.
4.
Observe that the gyro assemblies pivot through small precession-axis motion in response to light hand pressure applied to the azimuth yoke.
5.
Press the ANTENNA button until the display shows EL. Operate the Up/Down arrows or press 0.0 ENTER until the digital display indicates close to 000.0. At the radome observe that the antenna is pointed toward the horizon.
6.
Press the ANTENNA button until the display shows AZ. Operate the Up/Down arrows so as to have the digital display indicate close to the same reading as the ship’s heading. The ship’s heading is displayed by pressing the SHIP button. At the radome observe that the antenna is pointing away from the hatch.
7.
Press and hold the Up arrow. Observe that the antenna rotates clockwise. When the azimuth digital display reaches a value close to ship’s heading +265°, observe that the antenna automatically rotates in the counterclockwise direction and that the red Unwrap light illuminates, that the antenna stops its azimuth motion at an azimuth angle close to ship’s heading -95°, and that the Unwrap light is extinguished.
8.
Press and hold the Down arrow. When the azimuth digital display reaches a value close to ship’s heading -265°, observe that the antenna automatically rotates in the clockwise direction, that the red Unwrap light illuminates, that the antenna stops at an azimuth angle close to ship’s heading +95°, and that the Unwrap light is extinguished.
TeraScan 1.0 m/1.2 m/1.5 m /3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 89
Startup of the Tracking Antenna
4.3.1.2. Calibration of the Antenna Cable and System Checkout—ACU a.
Calibrate Antenna Control Cable (cable bundle A). This step should be done only for the purpose of verifying correct cable calibration.
!
Warning
110 VAC IS PRESENT AT SOME OF THE SCREW TERMINALS ON THE ANTENNA AND AT THE BACK OF THE RECEIVER CHASSIS. EXERCISE CAUTION WHILE ADJUSTING THE POTS.
b.
1.
Examine the right rear plate of the ACU. Set the ACU mode switch on the front to MANUAL. Two horizontal printed circuit boards will be visible through the holes. Power up the system according to section 4.2.
2.
Set the ACU selector to ELEVATION. On the rear panel on the ACU, press the calibration switch on the rear corner of the logic board (button on the right side and at the back of the receiver chassis of the lower board at the rear of the ACU.)
3.
Locate the azimuth pot signal wire at pin 9 on the screw terminal strip at the antenna pedestal inside the radome. Remove the wire from pin 9.
4.
Connect the wire from pin 9 to pin 10 on the screw terminal strip. Adjust the ZERO pot on the Motor Drive Board (top board, left side at the back of the ACU) until the display reads 000.1.
5.
Connect the wire from pin 9 to pin 12 on the screw terminal strip. Adjust the SPAN pot on the Motor Drive Board until the display reads 409.4.
6.
Reconnect the wire from pin 9 back to the screw terminal 9 on the screw terminal strip.
7.
Cycle power on the ACU.
ACU/Antenna System Checkout—ACU 1.
Turn on the main power switch on the front panel of the ACU.
2.
Press the RESET button on the ACU front panel to initialize the system.
3.
At the antenna, observe that the gyro flywheels are spinning. With a strobe tachometer, observe that the flywheels’ spin speed is approximately 3400-3500 rpm for 60 Hz and 2900-3000 for 50 Hz AC power.
4.
Observe that the gyro assemblies pivot through small precession-axis motion in response to light hand pressure applied to the azimuth yoke.
5.
Set the Function switch to elevation and the Mode switch to manual. Operate the up/down switch so as to have the digital display indicate close to 000.0. At the radome observe that the antenna is pointed toward the horizon.
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Startup of the Tracking Antenna
6.
Set the Function switch to azimuth and leave the Mode switch in manual. Operate the Up/Down switch so as to have the digital display indicate close to the same reading as the ship’s heading. At the radome observe that the antenna is pointing away from the hatch.
7.
Press and hold the up/down switch in the UP position. Observe that the antenna rotates clockwise. When the azimuth digital display reaches a value close to ship’s heading +265°, observe that the antenna automatically rotates in the counterclockwise direction and that the red Cable Unwrap lamp illuminates, that the antenna stops its azimuth motion at an azimuth angle close to the ship’s heading -95° and that the Cable Unwrap lamp is extinguished.
8.
Press and hold the up/down switch in the DOWN position and observe that the antenna rotates counterclockwise. When the azimuth digital display reaches a value close to ship’s heading -165°, observe that the antenna automatically rotates in the clockwise direction, that the red Cable Unwrap light illuminates, that the antenna stops at an azimuth angle close to ship’s heading +95°, and that the Cable Unwrap lamp is extinguished.
4.3.2. Alignment of the Tracking Antenna Log on to the system (if not already logged on) as shown (user responses shown in bold type): xxx login: xtuser password: xtuser Do not run these procedures while data acquisition is in progress. On some systems (those receiving WEFAX) the command safe_ant must be entered before entering the commands. Type exit to resume processing. Set the ship heading for the antenna. a.
Land-based permanent/fixed systems use a ship heading of 0.0°.
b.
Ship-based systems must have the current ship heading loaded into the antenna controller using the following steps. Only step-by-step headings can be entered.
[TAC -92]: 1.
Press the Ship button until the HDG reading appears alone on the display.
2.
Operate the Up/Down arrows until the heading value shown on the ship heading display matches the ship’s heading.
[ACU]: 1. c.
Select the Ship Heading position of the rotary dial of the ACU. Place the Auto/Manual switch to Manual.
If the ship heading is a non-zero value, the heading will be lost if power is lost on the TAC-92/ACU.
4.3.2.1. Antenna Alignment Using the Sun [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these examples. TeraScan 1.0 m/1.2 m/1.5 m /3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 91
Startup of the Tracking Antenna
Because the radome must be removed from the antenna in order for sun alignment to be performed, sun alignment should only be done if the antenna will not be contaminated by water or dust. Sun alignment cannot be done while the antenna is tracking a satellite. a.
If the sun casts a shadow that can be seen under the antenna feed, you can use the sunalign command to align the antenna. The radome must first be removed. Execute the following command to point the antenna to the sun: % cd % sunalign 0
b.
The antenna dish will move to a position that points at the sun. After six minutes, the antenna will return to a stowed position. If you need to repeat the sunalign command, wait 5 minutes to allow the feed to cool before doing so.
c.
When properly aligned, the shadow of the feed will form a concentric circle about the center of the dish.
d. If the dish is out of alignment: i.
Rotate the antenna's radome base until it is aligned. Allow the antenna to settle 60 seconds between movements.
Or ii. Software change: 1.
While the sunalignment is in progress, type: align 0
2.
Enter corrections [example (5.0)] in degrees until the feed forms a concentric circle about the center of the dish.
3.
Type: exit The correction value is displayed.
4.
[TeraScan 3.0]: Do you wish to save the correction in antenna.calib [yes/no]? If the user answers yes the setting az.orient in the file antenna.calib in the directory $PASSDIR/antenna is modified.
[TeraScan 2.6]: Do you wish to save the correction in tkconfig0 [yes/no]? If the user answers yes , the file tkconfig0 in the directory $PASSRSVP is modified. The field called antenna_azimuth_orientation in the antenna's record (0 or 1) will be modified. 5.
Rerun sunalign after the pass is complete and verify that the computer positions the antenna properly.
6.
Replace the radome.
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Startup of the Tracking Antenna
4.3.2.2. Antenna Alignment Using Signal Strength To align the antenna based on the signal strength from the satellite, type: [TeraScan 2.6]:% trackeye autoalign [TeraScan 3.0]:% trackeye chain autoalign The next time a scheduled pass occurs, the signal strength will be used to position the antenna associated with the pass. If the antenna can be aligned based on signal strength, the correction will automatically be loaded in the file [TeraScan 3.0]: $PASSDIR/antenna/antenna.calib [TeraScan 2.6]: $PASSRSVP/tkconfig0. If the antenna was not aligned because the pass was too short or because the antenna was blocked by surrounding structures, an alignment will be scheduled for the next pass.
4.3.2.2.1. Fine-Tuning the Antenna Alignment If the antenna has been previously aligned, its alignment can be fine-tuned as follows: a.
When the antenna begins tracking a pass, wait until frame lock occurs and data is being received.
b.
Type: % autoalign 0 fine
Do not run autoalign more than once per pass.
TeraScan 1.0 m/1.2 m/1.5 m /3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 93
Startup of the Tracking Antenna
Page 94 SeaSpace Corporation
5 Operation 5.1. Quick Checks of Correct Operation The tests described in this section must be run while the antenna is idle. Do not run them while the tracking positioner is moving due to data acquisition or sun alignment. The commands must be typed exactly as shown. If these tests are not successful, perform the diagnostics of section 7.0, to isolate the problem. [TeraScan 2.6]: See man acctelems for a description of the telemetry acquired by each tracking antenna. [TeraScan 3.0]: Use thelp system.config for a description of the telemetry acquired by each tracking antenna.
5.1.1. Antenna Controller Testing [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these examples.
5.1.1.1. TAC-92 Antenna Controller To test communications between the computer and the antenna controller, enter the following command: %
ac 0 P
The antenna should reply back with the current azimuth and elevation. A sample reply is: E891A3203 (elevation 89.1°, azimuth 320.3°)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 95
Operation
To observe the ship heading, enter: % ac 0 H A sample reply is: R2685H3460 (Antenna is at a ship-relative heading of 268.5° and the ship heading is 346.0° true north).
5.1.1.2. Antenna Controller Status Test To test communications between the computer and the antenna controller, enter the following command. Note that the command must be typed exactly as shown. %
ac 0 S
The antenna should reply back with the current azimuth, elevation, status, and ship heading. A sample reply is: For TAC - 92: S’H For ACU: E891000A3203@H1238 (elevation 89.1°, signal strength 0, azimuth 320.3°, controller status = “@”, ship heading 123.8°.) If the controller status is not “@”, press the RESET button on the antenna controller and repeat the command.
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Operation
5.1.2. Antenna Controller Drive Motor Test [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these examples.
5.1.2.1. TAC-92 Antenna Controller Drive Motor Test To test the ability of the antenna controller to drive the antenna, enter the following commands: (Note that the command must be typed exactly as shown). %ac 0 S Test the azimuth drive motor by typing: %ac 0 J1000
(100.0° azimuth)
The antenna should point to 100.0° azimuth. Wait until the antenna has stopped moving. (The ac 0 P command will show if it is still moving). %ac 0 P Then type: %ac 0 J6200
(620.0° azimuth)
%ac 0 P ! 100 Wait until the antenna has stopped moving. Test the elevation drive motor by typing: %ac 0 E100
(10.0° elevation)
Wait until the antenna has stopped moving. %ac 0 E900
(90.0° elevation)
%ac 0 P
(check 90.0° elevation)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 97
Operation
5.1.2.2. ACU Antenna Controller Drive Motor Test To test the ability of the antenna controller to drive the antenna, enter the following commands. Note that the command must be typed exactly as shown. %ac 0 S Test the azimuth drive motor by typing: %ac 0 K1000
(100.0° azimuth)
Wait until the antenna has stopped moving. %ac 0 K4500
(450.0° azimuth)
Wait until the antenna has stopped moving. Test the elevation drive motor by typing: %ac 0 J100
(10.0° elevation)
Wait until the antenna has stopped moving. %ac 0 J900 %ac 0 S
Page 98 SeaSpace Corporation
(90.0° elevation)
Operation
5.1.3. Optional: Heater Test To check correct operation of the antenna heater (supply power to the heater): a.
Open the radome.
b.
Increase the heater thermostat's setting until the thermostat clicks. The heater should warm up in about two minutes.
!
Caution
The heater will become HOT to the touch. c.
When testing is complete, return the thermostat setting to 32 °F (0 °C) as a starting temperature. Adjust the setting as needed in use.
d. Close the radome.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 99
Operation
5.2. Antenna Monitoring To observe the motion of the antenna and the progress of the frame synchronizer, type one of the following commands: [TeraScan 3.0]: %trackeye chain [TeraScan 2.6]: %trackeye It should be run from a small, 3-line window on the screen. The meaning of the fields are as follows: antenna azimuth relative to its mounting. If the antenna is ship mounted, this angle is relative to the bow of the ship. elev: antenna elevation, absolute, in degrees head: ship heading (if used) in degrees, True North. mo: motion of the antenna = no change (antenna is not tracking) A = antenna is ascending D = antenna is descending * = antenna is tracking. No elevation change yet. (The letter R precedes the motion if autoalign or align is running. See section 10.2.5. on page 285.) freq: frequency in MHz of the receiver # lin: number of scan lines acquired in this pass by the frame synchronizer s: bit sync switch data state N= Normal I = Inverted sig: signal strength (** = not used) range (0 = no signal) to (255 = full strength) fsync: frame sync status SEARCH = searching for start of frame LOCK = locked to start of frame azim:
At the end of the pass, the number of lines acquired will be zeroed and the antenna will be stowed. The command trackeye full can also be used to give additional information. See section “10.2.11. trackeye” on page 295 for more trackeye options.
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Operation
5.3. Operating Sequence Once the antenna has been powered up, calibrated, and aligned, it runs unattended. Data acquisition “passes” are scheduled to be acquired (either manually or automatically). When it is time to acquire the data, the TeraScan program antenna is executed, with the antenna, telemetry, start time and duration passed to the program. The tracking sequence is calculated based on: •
Tracking antenna position (latitude and longitude)
•
Time (GMT)
•
Satellite orbital elements
•
Ship heading
For [TeraScan 2.6] it is stored in the file: TRACKSxy (x is the frame synchronizer, y is the antenna unit or dish (0 or 1)) in the directory $PASSRSVP. For [TeraScan 3.0] it is stored in the file: TRACKSxx (xx=chain number) in the directory $PASSDIR/antenna. The tracking sequence consists of a fixed time series of azimuth and elevation commands. The antenna is pointed at the first position in the tracking sequence. As the real-time moment occurs, the command from the tracking sequence is sent to the antenna controller. The antenna controller drives the tracking positioner to point the feed plate. As data is acquired by the feed, it is amplified by the LNA and downconverted to a lower frequency (usually 137.5 MHz is the center frequency of the downconverter). The signal is then sent to the receiver located at the computer (inside equipment) over the signal line of the antenna cable. When the pass is over and the tracking sequence has been completed, the antenna is “stowed”. The stowing is optional and is defined in the file [TeraScan 2.6]: $PASSRSVP/tkconfig0, or [TeraScan 3.0]: $PASSDIR/antenna/antenna.calib.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 101
Operation
5.4. Periodic Maintenance The tracking antenna is able to operate without periodic maintenance. If desired, the following tests can be made with the power to the antenna still on. Once a week: 1.
Open the radome.
2.
Check for wear on the drive belts and flexed wiring harness. Check the harness for abrasion from the gyro wheels.
3.
Check for smooth motion of azimuth and elevation motors (run commands in section 5.1.2. starting on page 97).
4.
Perform the sunalign command. See section 4.3.2.1. starting on page 92 to check antenna alignment motor, and belt operation.
5.
Optional: Perform the heater test. See section 5.1.3. starting on page 99.
6.
Optional: Listen to the hum of the gyro wheels for sounds of wear, rubbing.
7.
Close the radome.
5.5. Consumables None
5.6. Fuses TAC-92 Antenna Controller:
6A 250 VAC Fast Blow 3AG [11401028]: 110 V use 3A 250 VAC Fast Blow 3AG [11401026]: 220 V use
HD100 Downconverter:
800 ma 250 VAC Slow Blow GDC [11401052]
ACU Antenna Controller:
6A 250 VAC Fast Blow 3AG [11401028]: 110 V use 4A 250 VAC Slow Blow 3AG [11401002]: 110 V use
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7 Fault Isolation 7.1. Causes of Loss of Pass Data The following conditions can cause loss of pass data. Some conditions will cause a gradual loss of data and only for some satellites; other conditions will cause a complete loss of data on all satellites. Perform the checks listed below in sequence before examining the hardware for failures. [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these examples.
7.1.1. Gradual or Temporary Loss of Data a.
Drift in System Clock: Use sunclock. Remember to verify correct date and time since the system operates on GMT (Zulu) time - not local time.
b.
Old Orbital Elements: One or more satellites will show increasing dropouts as the orbital elements get older. Add new orbital elements.
c.
Obstruction: The antenna is pointing at an obstacle that blocks reception. The antenna will continue to track even if data is not received.
d. Incorrect antenna location on Earth: Use whereami to verify or set the correct location.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 103
Fault Isolation
7.1.2. Complete Loss of Data a.
Incorrect time: Passes are tracked, but no data is received. Use sunclock or manually enter date and time.
b.
Incorrect orbital elements: Invalid orbital elements for one or more satellites. Enter new orbital elements.
c.
Invalid site location: The system thinks it is located at a different point on the earth. Use whereami or manually locate the system using newsite.
d. No passes scheduled to run: Use TeraCapCon, Xcapcon, or mansched to schedule passes. e.
Invalid ship heading: Ship heading is shown in the trackeye display (see section 5.2. starting on page 100). 1.
An invalid ship heading was entered for shipboard systems. (Step-by-Step Gyro)
2.
For a land based system, the ship heading should be 0.0°.
3.
Invalid shipheading from NMEA interface (see section 4.3.2 starting on page 91).
4.
Antenna does not point in the proper direction (see section 7 of this manual for diagnosis).
5.
Antenna tracks properly but no data is received (see section 7 of this manual for diagnosis).
7.1.3. No Data Received After Setup of Antenna The following conditions can occur upon system setup and will result in complete loss of data reception: a.
Antenna alignment: Antenna was not mounted so that it points towards true north (see section 4.3 starting on page 87).
b.
c.
Short/open in the signal cable going to the inside equipment from the antenna: 1.
Detach both ends of RF cable and verify that there is infinite resistance between the case and center pin of the cable.
2.
Verify that there is continuity between the center pins at each end of the cable.
Ground fault (signal noise): The earth ground of the receiver power cord must be attached to a true earth ground. If the receiver is not grounded, data will intermittently be received and dropped. Note that other components in the receive chain (receiver, power supplies, receiver RS232 control cables) may also be at fault. Consult the reference manual associated with the additional components.
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Fault Isolation
7.2. Antenna Subsystem Diagnostics 7.2.1. Test Environment a.
Run all diagnostics only if a pass is not being tracked and sunalignment is not in progress. Use trackeye to verify tracking.
b.
The section number of the repair procedure in this manual is shown in { }. The diagnostics shown below should be run by the TeraScan user xtuser, not the super user. Repeat the test several times before proceeding to repair. Cycle power on the antenna and computer, wait for initialization to complete, and repeat the test before proceeding to repair.
c.
Always allow the antenna to complete initialization before running any test.
d. All diagnostic tests shown in this section (Test on Computer) must be completed by pressing the Return or Enter key. [TeraScan 3.0]: Use the L- or S-band telemetry chain number in place of 0 in these examples. e.
On some systems the command safe_ant must be typed before entering the diagnostic commands. Type exit to resume processing.
f.
Before running any tests or changing the hardware always: 1.
Examine all cables, connectors, drive belts, motors, wiring harnesses, and rate sensors for wear, frayed or cut wires, or damage. Check that the antenna is not rubbing the radome as it turns. Test for overheating of motors.
2. 3.
If a connector is unplugged, check the pins for damage (bent pins or pins pushed into the housing) before reinserting the connector.
7.2.2. Test Equipment a.
Diagnostic Command ac. For a description of the ac command, see section 10.2.1 starting on page 279. [TeraScan 3.0] enter: %thelp ac or [TeraScan 2.6] enter: %man ac
b.
Volt/ohm meter (DMM).
c.
Spectrum analyzer for examining output signal from LNA or DC.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 105
Fault Isolation
7.2.3. Antenna Controller Unit (ACU) [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these tests.
7.2.3.1. Antenna Controller Unit - TAC-92/ACU The antenna controller unit receives hardware commands (see section 8.2) from the computer over the serial communication line, cable (N). It reports the status of the antenna on its front panel and to the computer. For other errors displayed on the readout of the ACU, see the Installation and Operations Manual SeaTel Model TAC-92 Tracking Antenna Controller [90200001].
Condition No communication with ACU.
Invalid data received from ACU.
Test on Computer ac 0 S
ac 0 S
Cause
Action
No power to TAC-92.
Supply power.
Bad RF cable (N).
Replace.
TAC-92 faulty.
Replace TAC-92 {8.2.30 on page 218}.
Serial port failure.
1. Try another serial port. 2. Replace CPU mother board.
Wrong serial port defined for this antenna.
Replace/substitute serial port on computer. [TeraScan 3.0]: Use tkconfig to redefine [antenna-x] antenna.device. [TeraScan 2.6]: Redefine $TKPORTxy. Restart system.
ACU faulty
Replace ACU {8.2.30 on page 218}.
Antenna configuration wrong
[TeraScan 2.6]: Correct antenna type in $PASSDIR/tkconfig0. [TeraScan 3.0]: Correct [antenna-x]antenna.type in system.config. Replace/substitute serial port on computer. [TeraScan 3.0]: Redefine [antenna-x]antenna.device. [TeraScan 2.6]: Redefine $TKPORTxy. Restart system.
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Fault Isolation
Test on Computer
Condition Error message “Another task is using this antenna.”
Red error light is on, Error =0001 Gyro Input
ac 0 S
Cause
Action
The function ac, or antenna is running.
1. Wait 60 seconds. Repeat the command. 2. Wait until pass is complete. 3. Use the ∗ option with the ac command. Results may vary. Use with caution.
Shipboard: See section 7.2.6. on page 117.
See section 7.2.6. on page 117.
Fixed system: Wrong gyro type.
Set Gyro Type =gyro/0. TAC-92 PROM 1.61 or greater.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 107
Fault Isolation
7.2.4. Antenna Tracking [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these tests.
7.2.4.1. Antenna Tracking - TAC-92 The antenna receives the stepper motor commands and replies with azimuth and elevation pot readings over cable A. Failures to move can be due to any of the following reasons: a.
The ACU is faulty.
b.
The fan-out is faulty.
c.
The cable to the antenna is faulty.
d. The antenna (stepper motors, wiring harness, pots) may be faulty.
Condition Antenna does not move in response to an ELEVATION drive command.
Test on Computer ac 0 E800 ac 0 P
Cause
Action
Screw terminal loose on fan out or base of antenna.
Tighten terminals or replace fan out {8.2.3., page 152}.
Bad stepper motor.
Replace stepper motor {8.2.1, page 138}.
Bad cable in antenna harness. Select spare wire in cable. For 1.5m antenna, see drawing 70930, page 145. For 3.0m antenna, see drawing 113214, page 147. For 1.0m/1.2m/1.5m antenna with separate downconverter, see drawing 800-07128, page 149.
Check Elevation Pot readings (TAC-92, 0–180°, Prom 1.60 or greater).
0° ≈ 1.0 VDC 90° = 2.5 VDC 180° ≈ 4.0 VDC
Page 108 SeaSpace Corporation
TAC-92 faulty.
Replace control board or TAC-92 {8.2.30., page 218}.
Pot not aligned.
Align pot to give these readings.
Fault Isolation
Test on Computer
Condition
Cause
Action
Dish Elevation goes up when commanded to go down and vice versa.
ac 1 E100 ac 1 E800
System type is 0 in TAC-92 configuration. 0 = 3.0m 1 = 1.0m, 1.2m, 1.5m
Set type. Save change permanently {8.2.36, page 228 and 8.2.37, page 230}.
Antenna moves or stepper moves but does not go to the correct ELEVATION position.
ac 0 E900 ac 0 E000 ac 0 P
Bad stepper motor. (See also 7.2.4.2, page 111).
Replace {8.2.1, page 138}.
Antenna does not move in response to an AZIMUTH drive command.
Bad cable in antenna harness. Select spare wire in cable. For 1.5m antenna, see drawing 70930, page 145. For 3.0m antenna, see drawing 113214, page 147. For 1.0m/1.2m/1.5m antenna with separate downconverter, see drawing 800-07128, page 149. Bad elevation pot.
Replace {8.2.3, page 152}.
Bad drive belt.
Replace {8.2.2, page 151}.
Elevation pot drive coupling loose.
Tighten set screws on coupling and realign pot {8.2.21, page 199}.
ac 0 A3000 ac 0 P
TAC-92 faulty.
Replace motor control board. Replace TAC-92 {8.2.30, page 218}.
(See also 7.2.4.2, page 111).
Screw terminal loose on fan out.
Tighten terminals or replace fan out {8.2.31, page 219}.
Bad stepper motor.
Replace {8.2.4, page 154}.
Bad cable.
Select spare wire in cable. For 1.5m antenna, see drawing 70930, page 145. For 3.0m antenna, see drawing 113214, page 147. For 1.0m/1.2m/1.5m antenna with separate downconverter, see drawing 800-07128, page 149.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 109
Fault Isolation
Condition Antenna moves or stepper moves but does not go to the correct AZIMUTH position.
Antenna does not maintain ship heading during pass.
Test on Computer ac 0 A3000 ac 0 A3600 ac 0 P (Antenna azimuth yoke should be parallel with base plate.)
Cause
Action
Bad stepper motor.
Replace {8.2.4., page 154}
Bad cable.
Select spare wire in cable. For 1.5m antenna, see drawing 70930, page 145. For 3.0m antenna, see drawing 113214, page 147. For 1.0m/1.2m/1.5m antenna with separate downconverter, see drawing 800-07128, page 149.
Bad azimuth pot.
Replace {8.2.5., page 165}.
Drive belt loose
Tighten {8.2.20., page 194}.
Bad drive belt.
Replace {8.2.6., page 168}.
Drive belt too tight.
Loosen {8.2.20., page 194}.
Drive belt has jumped azimuth pot sprocket.
Realign {8.2.20., page 194}.
Analog Gyro: “[nav-1] nav.type”/ COMPASS_ TYPE0=2, 3, or 4
No signal.
Connect gyro repeater inputs to GCU.
Check input of gyro compass repeater signal to ACU.
Repeater fuse blown.
Replace fuse.
Wrong gyro repeater type selected in ACU.
See {7.2.6., page 117}.
Page 110 SeaSpace Corporation
Fault Isolation
Test on Computer
Condition
NMEA Ship heading: Does trackeye report ship heading changes?
Cause NMEA messages not being received at system. 1. nmea_monitor program not running. 2. Serial port for NMEA messages not transmitting.
1. Start nmea_monitor. 2. Check cables, NMEA transmitter unit. Some NMEA units do not transmit valid heading if the ship is not moving. [TeraScan 3.0]: Use ac chain NMEA to check incoming NMEA messages.
Wrong gyro repeater type selected in TAC-92.
Correct gyro type. (front panel change) See section {7.2.6.1., page 117}.
“[nav-1] nav.type”/ COMPASS_ TYPE0=200X
Antenna does not maintain ship heading during pass.
ac 0 H
Action
Error code displayed using MODE/STATUS and ERROR. 1=Gyro read error 2=Wrong synchro converter type.
7.2.4.2. Stepper Motor Motion Test System will not drive in one axis (azimuth or elevation). If the system will not drive in azimuth but will drive in elevation or vice versa, you can troubleshoot the problem using a hand-held multimeter, the Terminal Mounting Strip (TMS) schematic (drawing 800-07127, page 67 or drawing 1240-07121, page 69), and the antenna pedestal schematic (for 1.5m antenna, see drawing 70930, page 145; for 3.0m antenna, see drawing 113214, page 147; for 1.0m/1.2m/1.5m antenna with separate downconverter, see drawing 800-07128, page 149). The three common sources of this problem are: opens and shorts between the TAC-92 and the stepper motor, bad drivers in the TAC-92 and a bad stepper motor. NOTE:
Unless otherwise specified, all voltage checks are referenced to TMS pin 24 (ground) (i.e., one probe is on pin 24 (ground) and the other on pin 13–18 (1–6). The terminal pins referred to are for the azimuth drive and those in parentheses are for the elevation drive.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 111
Fault Isolation
1.
On the Terminal Mounting Strip or Fanout (located behind the TAC-92), check azimuth pins 15 and 16 (3 and 4 for elevation) for the presence of 10–12 VDC. If there is no voltage, proceed to Step 6.
2.
If the voltage is correct, then check pins 13, 14, 17, 18 (1, 2, 5, 6) for a voltage of approximately 10 VDC or 0.5 VDC. These are the return lines. If any test point reads 0.0 volts, then there is an open between the Terminal Mounting Strip and the stepper motor; proceed to Step 7. One or two of the test points just checked should have been approximately 0.5 VDC and the remaining test points should have been approximately 10 VDC. They should not all be at the same potential
3.
To test the azimuth motor, press the ANTENNA button until only the Azinuth reading is showing. To test the elevation motor, press the ANTENNA button until only the Elevation reading is showing. Measure each of the 4 test points in Step 2 while you press the UP button 8 times. Each test point should be high (H=10 VDC) for 5 cycles and low (L=0.5 VDC) for 3 cycles. The High/Low pattern should appear as shown below.
TERMINAL PINS AZ (El)
CORRECT SEQUENCE Start <------Down | UP------>
TB 1-13 (1)
L
L
H
H
H
H
H
L
TB 1-14 (2)
H
H
H
L
L
L
H
H
TB 1-17 (5)
H
H
H
H
H
L
L
L
TB 1-18 (6)
H
L
L
L
H
H
H
H
L = 0.5 VDC
H = 10–12 VDC
NOTES:
4.
a.
If the motor moves slowly, the coils of one phase of the motor is bad. Replace motor.
b.
If a 12 VDC supply line is open, two of the test lines will always be low.
c.
If two lines are shorted, there will be a low reading for more than 3 counts.
Use the worksheet below to record your results.
TERMINAL PINS AZ (El) TB 1-13 (1) TB 1-14 (2) TB 1-17 (5) TB 1-18 (6)
Page 112 SeaSpace Corporation
CORRECT SEQUENCE Start <------Down | UP------>
Fault Isolation
5.
If one test point is high all the time, check continuity between that test point and its associated pin at the TAC-92.
6.
If one test point is low all the time (but not 0 volts), the problem will most likely be in the TAC-92. Replace the main control board {8.2.32, page 222} and retest the problem line. If one test point reads 0.0 volts, see Step 7.
7.
If pins 15, 16 (3, 4) do not have 10 – 12 VDC, turn off the TAC-92 and remove J2 from the back of the TAC-92., turn on the TAC-92 and check for voltage at pins 3, 4 (9, 10) on J3. If there is power at these points, the Terminal Mounting Strip cables are open and should be replaced. If there is not power at these pins, the TAC-92 is damaged and should be replaced {8.2.30, page 218} or the motor drive board should be replaced {8.2.32, page 222}. NOTE:
8.
If only one of the two test points does not have voltage, it is possible to keep the system operating by installing a jumper between the two points, i.e., TMS 15 and 16 or TMS 3 and 4.
If any test point from Step 2 reads 0.0 volts, then there is an open between the Terminal Mounting Strip and the Stepper Motor. Referring to the antenna schematic drawing, measure the voltage on TMS 15 16 (TMS 3, 4) at the azimuth yoke. These test points should always be at 10 VDC. If the voltage reading is close to 0.0 volts, then the problem is in the supply line that reads 0. 0 VDC. If the voltage reading on TMS 15, 16 (TMS 3, 4) is 10 – 12 VDC, then the problem is in the return line which had the 0.0 VDC reading.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 113
Fault Isolation
7.2.5. RF Electronics [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these tests. The power to the RF electronics (LNA, combline filter, and downconverter) is supplied by the receiver. The power to each down converter is controlled by the “O” command {section 8.2. A, page 133} that is sent to the ACU. The ACU sends the command to the down converter over line 8 (select frequency). The state of the switcher is set by the value in the following files: [TeraScan 3.0]: system.config [TeraScan 2.6]: tkconfig0 associated with the satellite last received. When the power is turned on to the RF electronics, the switch select LED on the downconverter is on set as follows using the ac chain 0x command:
-----------------------------------Separate Downconverter---------------------------------HRPT
DMSP
[TeraScan 2.6]:
O0
O1
[TeraScan 3.0]: [Chain] down_converter:
1
2
------------------------Integrated Feed/LNA/ Downconverter---------------------------HRPT
DMSP
ac command:
O1
O0
[TeraScan 3.0]: [Chain] down_converter:
2
1
Perform the following tests after section 7.2.3. on page 106.
Page 114 SeaSpace Corporation
Fault Isolation
Test on Computer
Condition Downconverter not operating. To turn on power to DMSP at downconverter, enter command shown in "Test on Computer" column.
[TeraScan 2.6]: ac 0 O* (LED light is off) [TeraScan 3.0]: ac chain O* (*= see above)
Cause Separate Downconverter If power LED is not on, switcher circuit is not receiving power.
If LED is on, downconverter is faulty.
Integrated Downconverter See drawing 70928007, page 187 for voltage measurements.
.
HRPT not selected: To select HRPT at downconverter, enter command in "Test on Computer" column.
[TeraScan 2.6]: ac 0 O* (LED should be on downconverter select light.) [TeraScan 3.0]: ac chain O* (*= see page 114)
There is power at downconverter but not at LNA.
Measure voltage at LNA (+15 VDC expected).
Action
Connect power to downconverter. Connect power, or • Replace harness {8.2.8, page 173}. • Replace fuse in downconverter. Replace downconverter {8.2.9, page 175}
Connect power to downconverter. Connect power, or • Replace harness {8.2.8, page 173}. • Replace fuse in downconverter. Replace downconverter {8.2.9, page 175}
Separate Downconverter If LED is off, downconverter is faulty. Integrated Downconverter See drawing 70928007, page 187 for voltage measurements.
Flexing power wire to LNA is faulty.
Replace downconverter {8.2.9, page 175}.
Replace feed {8.2.11, page 181}.
Replace {8.2.8, page 173}.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 115
Fault Isolation
Condition
Test on Computer
No signal and power is OK.
DMSP not selected: To select DMSP at downconverter, enter command in "Test on Computer" column.
Acquire pass.
[TeraScan 2.6]: ac 0 O* LED select should be off [TeraScan 3.0]: ac chain O* (*= see page 114)
Page 116 SeaSpace Corporation
Cause
Action
Worn RF cable to downconverter.
Replace {8.2.8, page 173}.
Defective downconverter [70151xxx]
Replace downconverter.
Open in RF cable in harness [12573034] [12573094].
Replace {8.2.8, page 173}.
Separate Downconverter If LED is off, downconverter is faulty. Integrated Downconverter See drawing 70928007, page 187 for voltage measurements.
Replace downconverter {8.2.9, page 175}.
Replace feed {8.2.11, page 181}.
Fault Isolation
7.2.6. Gyro Interface [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these tests.
7.2.6.1. Gyro Interface - TAC-92 The gyro interface is used when the system is mounted on board ship and a gyro compass repeater signal is supplied to orient the antenna as the ship turns.
Test on Computer
Condition No reply from antenna.
ac 0 S
Cause No power on TAC-92.
Action • Check power supply. • Check TAC-92 fuse. • Check cable connections.
Reply comes from antenna but antenna does not respond to ship changes.
Step-by-step gyro: Gyro compass sending signals but TAC-92 does not respond.
Check signal from gyro repeater.
Measure voltage on terminals A, B, & C to common. One or two terminals of (A, B, or C) must have voltage greater than 10 volts DC. The other one or two terminal(s) must have 0 volts. See note on page 119.
Wrong input voltage selected at TAC-92.
Check power input module: 110-120 VAC or 220-240 VAC selected. To change input power, remove fuse clip below power cord. Voltage words are right side up for voltage in use (and located next to black triangle at bottom of input power module)
Wiring misplaced. No signal. Gyro repeater fuse blown.
Re-order repeater wires at TAC-92.
Gyro compass repeater faulty.
Replace.
Replace fuse.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 117
Fault Isolation
Condition
Test on Computer
Cause
Action
Step-by-step gyro: Ship heading from antenna continues to change (see H reply) but ship is not turning.
ac 0 H ! 100
Defective TAC-92.
Replace TAC controller board.
Step-by-step gyro: Ship turns clockwise, but ship heading is changing counterclockwise.
ac 0 H
Terminals A, B, or C out of sequence.
Exchange wires on terminals A and B.
Voltage inputs to GCU are valid.
Check GYRO TYPE setting on TAC-92
2 = Step by Step (PROM 1.61 or greater)
Change setting as required. See section 8.2.35. on page 226.
0 = Step by Step (PROM < 1.61) 0 = No Gyro (PROM 1.61 or greater) 360 = 360:1 synchro 36 = 36:1 synchro 1 = 1:1 synchro
Page 118 SeaSpace Corporation
Note: 36:1 and 1:1 require special converter boards.
Fault Isolation
Test on Computer
Condition Synchro gyro: Wiring is correct and jumpers are correct but antenna not responding to changes.
Step-by-step gyro: Ship turns clockwise, but ship heading is changing counterclockwise.
Cause
Examine synchro interface board.
Action
Improper synchro.
Replace synchro interface board [12573064] = 50/60/400 Hz, 1:1 or 36:1 [12573063] = 50/60/400 Hz, 360:1 Turn off power to synchro repeater before replacing TAC-92 parts.
ac 0 H
Check gyro repeater voltages: R1 to R2 = 100 V One pair of S measures 90 V, the other two S pairs add up to 90 V. [Example: (S1 to S2) = 90 V, (S1 to S3) + (S2 to S3) = 90 V]
Replace gyro repeater fuses
Terminals A, B, or C out of sequence.
Exchange wires on terminals A and B.
Note—Step-by-Step Gyro Timing (6 steps per degree): The voltage of terminals A, B, & C of the gyro repeater signal can be measured across the COM terminal. As the ship turns, the digital pattern shown below must occur for each degree of change. 0 means 0 VDC. 1 means >10 VDC. A value of 5 to 7 VDC is invalid.
0/6° 1/6° 2/6° 3/6° 4/6° 5/6° 0/6°
A
B
C
1 1 1 0 0 0 1
0 0 1 1 1 0 0
1 0 0 0 1 1 1
sequence repeats
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 119
Fault Isolation
7.2.7. General System Faults [TeraScan 3.0]: Use the telemetry chain number in place of the antenna unit 0 in these tests. This section covers faults that may involve several components.
Condition
Test on Computer
Cause
Action
When sunalign is performed, antenna does not track.
sunalign 0
Nighttime
Wait until morning and rerun.
Pass is not tracked by the antenna.
Examine trackeye output.
Two copies of the antenna function have been scheduled. The second copy of antenna is waiting to run.
The first copy of the antenna program can be halted by typing trackeye chain abort trackeye chain noabort
7.2.8. Antenna Heater (Optional) Condition Heater does not operate.
Test on Computer Run test of section 5.1.3., page 99.
Page 120 SeaSpace Corporation
Cause
Action
Supply not connected
Connect Supply
Fuse Blown
Isolate short, replace fuse.
Thermostat defective
Replace heater assembly.
Heater Coil Defective
Replace heater assembly.
Fault Isolation
7.3. How It Works 7.3.1. Tracking Process When a pass is tracked, serial commands (RS-232) are issued to the TAC-92/ACU antenna controller. Each command is to move the antenna in azimuth or elevation. The antenna controller reads back the curent position by measuring the voltage sent from each potentiometer (azimuth or elevation). The pots send a reading varying from 0 to 5 volts DC. Based on the current position and the new commanded position, the azimuth or elevation stepper motor is commanded to turn clockwise or counterclockwise until it reaches the position The motor is shut off when the antenna is within 0.5 degree of the commanded position. For example, if the antenna elevation is 3.0 degrees and the antenna is commanded to move to 4.0 degrees, the elevation motor will turn on and raise the dish until the elevation pot reads 3.5 degrees or more, at which time the elevation motor is turned off. The accuracy of the azimuth and elevation pots is 0.5 degree. The resolution is 0.1 degree.
7.3.2. Hardware Components The following is a list of all components that will fail under normal operation.
Component
Type of Failure
Cause
Elevation Drive Belt or Azimuth Drive Belt
Motor does not move antenna when commanded.
Belt is broken or has come off the sprockets.
Azimuth or Elevation Stepper Motor and Sprocket
Motors may not move or may be weak, or move erratically.
Set screw is loose on motor sprocket or motor is bad. Azimuth motor sprocket is out of alignment with sprocket on the center shaft of the azimuth yoke.
Elevation Pot and Coupling
Readings are erratic as the antenna elevation is constantly increased; the readings vary (higher, lower, higher).
Set screw is loose on coupling or pot is bad. Wires loose in screw terminals.
Azimuth Pot and Drive Sprocket
Readings are erratic as the antenna azimuth is constantly increased; the readings vary (higher, lower, higher).
Set screw is loose on coupling or pot is bad. Wires loose in screw terminals.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 121
Fault Isolation
Component
Type of Failure
Cause
Wire Harness, from base of antenna to azimuth yoke
Motors are not moving or are weak, or pot readings are bad.
Flexing the wires will break the wire (often inside the insulation).
Wire Harness, from azimuth yoke to elevation side pan
Elevation motor is not moving or is weak, or elevation pot readings are bad.
Flexing the wires will break the wire (often inside the insulation).
TAC-92 Antenna Controller Motor Board
a. Unable to talk to the TAC-92 from the computer.
a. Serial port problems or TAC-92 not powered on.
b. Motors are weak and cannot move to commanded positions all the time.
b. Wires loose in fanout screw terminal or controller is bad.
c. Motors do not move at all.
c. Wires loose in fanout screw terminal or controller is bad.
d. Antenna Type has not been set in the TAC-92 coefficients.
d. Antenna coefficients not saved after being entered. Cycling power then erases them.
e. Antenna does not move to the correct position in azimuth.
e. Antenna cable has not been calibrated.
Notes: 1. The azimuth and elevation stepper motors are the same component. 2. The azimuth and elevation drive belts are the same component.
7.3.3 Isolating Failures Sometimes one component failure will mask another. For example, a motor will appear bad when a wire is broken/failing. The general course to follow is to check/replace drive belts, pots, motors, wire harness, and then the TAC-92/ACU antena controller, in that order. Another type of failure is when the bad pot reading causes the motor to move inthe wrong direction. To isolate the motor from the pot, use the up arrow () and down arrow () buttons on the TAC-92 controller. Example: Testing the elevation motor. a.
Select the elevation reading on the TAC-92.
b.
Press up arrow button (). The elevation motor will drive the dish to a higher elevation if it is working correctly. Even if the dish is moving to a higher elevation, the elevation pot may not report this correctly.
Page 122 SeaSpace Corporation
8 Repair Procedures The repair procedures shown in this section are intended to be performed after the fault has been isolated by the diagnostics of section 7. The repairs should be performed by a technician with basic mechanical and electrical skills. All components of this subsystem are replaced using English tools. Any component repair is expected to be done at the factory, not in the field. SeaSpace part numbers are shown in [ ]. For example: [12573016]. A series of the same part is shown as [12719xxx].
Summary of Repairs Repair of Tracking Positioner 8.2.1. 8.2.2. 8.2.3. 8.2.4. 8.2.5. 8.2.6. 8.2.7. 8.2.8. 8.2.9. 8.2.10. 8.2.11. 8.2.12
Elevation Motor [12573033] [12573039] and Drive Sprocket [12573039] ...................page 138 Elevation Drive Belt [12573040][125730707] ..................................................................page 151 Elevation Pot [12573032] [12573073] and Coupling [12573041][12573704] ...............page 152 Azimuth Motor [12573033] [1257305] and Drive Sprocket [12573039] ......................page 154 Azimuth Pot [12573031] [12573701] and Drive Sprocket [12573039] .........................page 165 Azimuth Drive Belt [12573040] & Azimuth Drive Chain [12573706].........................page 168 Gyro Frame [12573001] .....................................................................................................page 170 Antenna Wiring Harness [12573034] [12573094] [12573708] .......................................page 173 Downconverter [70151xxx]...............................................................................................page 175 Feed/LNA [12763xxx] [12799001] ...................................................................................page 176 Integrated Feed/LNA/Downconverter.........................................................................page 181 Power Injector ....................................................................................................................page 192
Adjustments of Tracking Positioner 8.2.20. 8.2.21.
Azimuth Alignment and Azimuth Belt Tension Adjustment .....................................page 194 Elevation Alignment and Elevation Belt Tension Adjustment ...................................page 199
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 123
Repair Procedures
8.2.22. 8.2.23. 8.2.24.
Antenna Balancing ............................................................................................................page 202 Antenna Control Cable Calibration ................................................................................page 207 Azimuth Sprocket Alignment..........................................................................................page 216
Antenna Controller 8.2.30. 8.2.31. 8.2.32. 8.2.33. 8.2.34. 8.2.35. 8.2.36. 8.2.37 8.2.40. 8.2.41. 8.2.42.
Antenna Control Unit (ACU)[12573104]/(TAC-92)[12573002] ................................page 218 Fan Out TAC-92 [12573095] for ACU [12573105].......................................................page 219 Motor Board - TAC-92 [12573010] ................................................................................page 222 Bridge Rectifier - TAC-92 [12573030] ...........................................................................page 224 Power Module - TAC-92 [12573015] ............................................................................page 225 PROM Replacement - TAC-92 [12573090]...................................................................page 226 Record the Current Settings of the TAC-92.................................................................page 228 Enter Settings in the TAC-92 .........................................................................................page 230 Logic Board - ACU [12573104]......................................................................................page 231 RS232 Daughter Board - ACU [12573104] ...................................................................page 232 Motor Board - ACU [12573104].....................................................................................page 233
Notes: 1.
All antenna repairs should be performed with the power turned off to the Antenna Control Unit (ACU/TAC-92) unless noted. This section describes two antenna controllers: ACU - [12573104] The Azimuth Command uses the letter “K” and valid values range from K950 to K6250. Black front, red display digits, rotary dial, motor and driver boards. TAC-92 - [12573002] The Azimuth Command uses the letter “A” and valid values range from A0000 to A3600. Black front, blue buttons, blue display digits, keypad, one controller board.
2.
Some 1.0m and 1.2m antennas do not include a gyro frame [12573001] to balance the antenna. Instead, the antenna positioner is leveled using a clamp [70044001]. The 1.5 m and 3.0 m antennas use a solid post that needs no clamp or gyro frame.
Page 124 SeaSpace Corporation
Repair Procedures
8.1. Tool Kit [70042xxx]
Quantity
SeaSpace Part #
Description
2
12582001
19 mm (3/4") box wrench
1
12588002
3 mm (1/8") flat blade screwdriver
1
12588001
6 mm (1/4") flat blade screwdriver
1
12564001
150 mm (6") crescent wrench
1
12578007
7.9 mm (5/16") (open end) wrench
1
12563001
127 mm (5") diagonal cutters
1
12588004
#0 Phillips screwdriver
1
12588003
#2 Phillips screwdriver
1
12571003
3/8” nut driver
1
12571001
5/16" nut driver
1
12571002
11/32” nut driver
1
12571004
7/16" nut driver
1
12572020
hex wrench kit 5/64” to 1/4”, 9 piece
1
12572007
5/32” hex key
1
12572001
1/16” hex key
1
12594003
PROM inserter, 36-40 pin
1
12594001
PROM remover, 24-40 pin
1
12623002
Wrist strap, grounding
2
12581001
Level, bubble
1
12598001
Digital Multimeter, battery operated Battery: x2 LR-44 1.5 V or x2 Eveready EPX76
All tools shown above are part of tool kit [70042001] (tool box) or [70042002] (soft case).
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 125
Repair Procedures
Quantity
Seaspace Part #
Optional Tools (not included in all systems)
1
12597001/ 66000001
Cordura soft tool case, blue [70042002]
1
12590002
Tool box 30.5 cm (12”) x 14 cm (5.5”) x 6.3 cm (2.5”) [70042001]
1
M22520/1-01
Crimper, Mil MS Connector
1
M22520/1-04
Turret for crimper (12, 16, 20 gage)
1
MS27495A20
Insertion tool, 20 gage, MS Connector
1
MS27495R20
Removal tool, 20 gage, MS Connector
1
12583001/ 12583002
Crimper, “N” Connector
1
MS27495A20
Insertion tool, 20 gage, MS Connector
1
MS27495R20
Removal tool, 20 gage, MS Connector
1
600F005-15P
Socket, size 15, MS Connector, pin
1
600-006-14
Back Shell Assembly Tool, Size 14
2
12578021
1-1/8” open-end wrench, Trim Rods, 3.0m
1
12122001
Force gage, 0–3 kg (0–5 lb)
1
Quantity
15 cm (6") ruler
Seaspace Part #
Consumables
25
12554001
Tie wraps, 71 mm (2.8")
25
12554002
Tie wraps, 13.9 cm (5.5")
25
12554004
Cable wraps, 100 mm (4”)
4
12596001
Weights, 0.5 ounce
1
12577001
Locktite 242 (blue)
1
12577003
Locktite 271 (red)
2
11904004/11904007
Connector, N
1
MS27467T15B18SA
Downconverter MS Connector
1
MS27506A14-2
MS Backshell, size 15
1
12094001
Copper Antiseize Lube
Page 126 SeaSpace Corporation
Repair Procedures
Antenna Repair Kit 70221 Sheet 1
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 127
Repair Procedures
Antenna Repair Kit 70221 Sheet 2
Page 128 SeaSpace Corporation
Repair Procedures
Antenna Repair Kit 70221 Sheet 3
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 129
Repair Procedures
Stepper Motor (70973020)
Page 130 SeaSpace Corporation
Repair Procedures
Azimuth Pot (70973021)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 131
Repair Procedures
Elevation Pot (70973022)
Page 132 SeaSpace Corporation
Repair Procedures
8.2. Antenna Components A. Antenna Control - TAC-92 A.1. Control Code Details - PROM 1.60 or greater PROM 1.60 can drive the elevation from 0 to 180° for land-based, permanent systems.
Control Code
Function
6
Azimuth CW one step
4
Azimuth CCW one step TAC response: None
8
Elevation UP one step
2
Elevation DOWN one step TAC response: None
>
Move gyro compass heading up 1/6 degree
<
Move gyro compass heading down 1/6 degree TAC response: None
Aaaaa
Move (Azimuth) to aaa.a degrees magnetic. May cause antenna to move more than 180° if shorter path will place antenna within 90° of an end stop. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 mS.
Baaaa
Set ships compass heading to aaa.a degrees. Sets Heading Valid flag (Bit 3, word 2). Resets calculated azimuth position (P command) to ships heading + azimuth relative position modulo 360.0°. The ships heading is automatically updated by the gyro compass inputs to the ACU. Not valid for 1:1 gyro compass interface. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 mS.
C
Step track ON. Clears Steptrack ON status flag (bit 3, word 1). Enables step track movements synchronized with “L” signal strength updates. Default state OFF. TAC Response: None
D
Step track OFF. Clears Steptrack ON status flag (bit 3, word 1). Disables step track movements. TAC Response: None
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 133
Repair Procedures
Control Code Eeee
Function Move (Elevation) to ee.e degrees. PROM 1.60: eee = [0, 180.0], earlier PROMs: eee = [0, 90.0]. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 ms.
F
Toggle auto unwrap ON/OFF. Toggles Auto Unwrap ON status flag (bit 5, word 1). Enables/Disables auto unwrap. Default state in ON. Normal TAC Response: None
Jhhhh
Move azimuth to ship relative position. Azimuth stabilization, Unwrap and Tracking mode remain active after a J command. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 ms.
Lssss
Signal strength update. Used for Steptrack and Search functions. Signal strength information is sent as one to four ASCII hexadecimal digits in the range of 0 (or 0000) to FFFF. Leading 0’s are ignored. The resolution should be sufficient to detect the smallest step size expected. Usually 0.1 to 0.3 dB is sufficient. A signal strength update above the TAC threshold setting terminates a “K” or “R” search. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 ms.
Nnnn
Set number of signal strength updates to accumulate for each trial step for step track operation. “N” should be set for a 2-6 second step track interval. Allowable range is 1 to 255. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 ms.
Ox
Output data to downconverter. Changes logic state of output lines DO0. Data is sent as ASCII hexadecimal. Allowable range of x is “0” to “1”. O0 = HRPT (Select open, select light ON) O1 = DMSP (Select grounded, select light OFF) TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 mS.
R
Starts spiral search pattern for satellite. Sets Searching status flag (bit 0, word 2) and Steptrack ON status flag (bit 3, word 1). Search pattern increment and maximum size are pre-set by the TAC-92 Setup parameters. Search is terminated by an “L” update that is greater than the preset threshold parameter or no signal found by the end of the search. If no signal is found then antenna is returned to its original azimuth position. The tracking mode is left in the same condition it was before the search was initiated. TAC Response: None. Search begins immediately.
Page 134 SeaSpace Corporation
Repair Procedures
Control Code U
Function Force cable unwrap. Allowed only if relative AZ position is greater than 540 or less that 180°. Sets Unwrap status flag (bit 2, word 1). TAC response: Echoes “U”,CR,LF,”>“ if AZ position is > 540 or < 180°. No echo if unable to unwrap.
W
Write all setup parameters to NV RAM. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 mS.
Xnnn
Set azimuth step track size to nnn steps. Allowable range 1 to 255. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 mS.
Ynnn
Set elevation step track size to nnn steps. Allowable range is 0 - 255 steps. Setting “Y” to zero disables elevation step track doubling the speed of the azimuth step track. TAC Response: CR,LF,”>“ when command is accepted. Normal command acceptance latency is 25 mS.
$mmmmmm
NMEA Latitude/Longitude input. Sentence format as follows: GPGLL,YYYY.YY,N,XXXXX.XX,W, (UTC optional) YYYY.YY=Latitude in Degrees, Minutes, Decimal Minutes N = North, S = South Latitude XXXXX.XX=Longitude in Degrees. Minutes. Decimal Minutes E = East, W = West Longitude
A.2. Monitor Code Details Control Code H
Function Relative AZ / Ships Heading position report. Reports simultaneous value of antenna-relative position and Ships heading position in tenths of degrees. The allowable range of values for relative azimuth position is 0950 to 6250. The allowable range of values for ships heading is 0000 3599. TAC Response: “RrrrrHaaaa”,CR,LV,”>“ after normal command latency of up to 25 mS.
M
Parameter Dump. Response is one line of ASCII characters representing the X,Y and N step track parameters. TAC Response: “Xnnn Ynnn Nnnn”,CR,LF,”>“ after normal command latency of up to 25 mS.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
Control Code P
Function AZ/EL Position. Response is one line of ASCII characters representing the antenna elevation and true azimuth position in tenths of a degree. Elevation range is 000 to 900. Azimuth range is 0000 to 3599. TAC Response: “EeeeAaaaa”,CR,LF,”>“ after normal command latency of up to 25 mS.
S
TAC Status. Response is two ASCII characters representing the system status according to the following table. This command can be issued at any time and is not locked out by pending I/O commands TAC Response: “Snn”,CR,LF,”>“ upon receiving status request. nn Status Words:
V
WORD 1
WORD 2
Bit 0 = Near lower azimuth limit Bit 0 = Near upper azimuth limit bit 2 = Unwrap in progress Bit 3 = Steptrack On Bit 4 = Spare Bit 5 = Auto Unwrap On Bit 7, 6 = 0,1 (forces ASCII @−−)
Bit 0 = Searching Bit 1 = Spare Bit 2 = Spare Bit 3 = Heading Valid Bit 4 = Auto Reporting On Bit 5 = Azimuth Targeting Bit 7,6 = 0,1
Software Version. Response is ASCII string defining software model and version number. TAC Response: “TAC-92 VER N.NN”,CR,LF,”>“ after normal command latency of up to 25 mS.
%
Signal Strength. Response is average signal strength over N sample intervals in ASCII hex characters. Allowable range of response is 0000 to FFFF. TAC Response: “Lssss”,CR,LF,”>“ after normal command latency of up to 25 mS.
=
Auto Heading Report ON. TAC-92 will send “Haaaa”,CR,LF,”>“ automatically once each second.
General Notes The CR, LF,”>“ echo indicates that the TAC has accepted a command and is ready to process the next command. Any additional commands will not be accepted until after the TAC echoes CR,LF,”>“.
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B. Antenna Control -ACU Control Function
Code A
move azimuth CW one step
B
move azimuth CCW one step
C
auto step-track on
D
auto step-track off
E
move elevation Up one step
F
move elevation Down one step
Jeee{ }
move elevation to ee.e degrees
Kaaaa { }
move azimuth to aaa.a degrees
Lhhhh { }
set ships heading to hhh.h degrees
P
auto reporting off
Ox
select downconverter
R
auto reporting on
S
send status update
{}
carriage return (OD)
x = 0 HRPT = 1 DMSP
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 137
Repair Procedures
8.2.1. Elevation Stepper Motor and Drive Sprocket The same stepper motor is used for azimuth or elevation.
Tools: #2 Phillips screwdriver 6 mm (1.4”) flat blade screwdriver 11/32” nut driver 5/64” hex wrench 3 mm (1/8”) flat blade screwdriver 4 tie wraps 4” 4” diagonal cutters
Part Location: 1.0m/1.2m/1.5m: [12573033] Elevation Motor [12573039] Drive Sprocket Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The elevation stepper motor is in the middle of the left elevation plate. See drawing 111596A, item 13, on page 141.
3.0m: [12573705] Elevation Motor The elevation motor is on the underside of the azimuth yoke. See item 28, drawing 113218, on page 143. ACU
TAC-92 [ac 0 E000]
Antenna Elevation:
0°
[ac 0 J000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.0m/1.2m/1.5m: 1.
Cut the tie-wraps around the wires from the stepper motor to the terminal strip.
2.
Loosen the wires at the terminal strip. Record the wire color-screw terminal assignment. See drawing 70930 on page 145, or 800-07128 on page 149.
3.
Slide the drive belt off the large timing pulley.
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4.
Loosen the set screw on the sprocket on the motor and remove the sprocket.
5.
Remove the four machine screws that attach the motor to the elevation plate and remove the motor.
6.
Position the new stepper motor on the elevation plate with the wires facing the antenna yoke.
7.
Replace the four machine screws and hardware using Locktite 242.
8.
Replace the drive sprocket on the end of the stepper motor shaft. The shaft is inset 1.5 mm (1/16”). Tighten the set screws on the sprocket [12573039].
9.
Replace the elevation drive belt. See section 8.2.2., starting on page 151.
10. Attach the wires from the stepper motor to the terminal strip. 11. Cinch the tie-wraps around the wires from the stepper motor. Cut off the tie-wrap excess. 12. To balance the gyro frame: a. Power should be off. b. The antenna should be balanced. See section 8.2.22., starting on page 202. c.
Slowly rotate the gyro frame around the antenna. i.
If the antenna tips away from its level position and towards the gyro frame, remove one washer from each of the four gyro frame bolts (steps 6 and 7).
ii. If the antenna tips away from its level position and away from the gyro frame, add one washer to each of the four gyro frame bolts.
3.0m: 1.
Cut the tie-wraps around the wires from the stepper motor to the terminal strip.
2.
Loosen the wires at the terminal strip. Record the wire color-screw terminal assignment. See drawing 113218 on page 143, and drawing 113214 on page 147.
3.
Remove the four machine screws that attach the motor to the azimuth yoke and remove the motor.
4.
Loosen the set screw on the sprocket on the motor and remove the sprocket.
5.
Replace the drive sprocket on the end of the stepper motor shaft.
6.
Position the new stepper motor on the elevation plate with the wires facing the antenna yoke.
7.
Replace the elevation drive chain.
8.
Replace the four machine screws and hardware using Locktite 242.
9.
Attach the wires from the stepper motor to the terminal strip.
10. Cinch the tie-wraps around the wires from the stepper motor. Cut off the tie wrap excess.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 139
Repair Procedures
Page 140 SeaSpace Corporation
Repair Procedures
Elevation Pan Assembly 1.0m/1.2m/1.5m (111596A)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 141
Repair Procedures
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Repair Procedures
AZ Yoke/Spindle Assembly - 3.0m (113218)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 143
Repair Procedures
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Repair Procedures
Antenna Schematic SeaTel 1.5 m with Integrated Feed/LNA/DC (70930)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 145
Repair Procedures
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Repair Procedures
Antenna Schematic Model 3.0m SAR-120 (113214)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 147
Repair Procedures
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Repair Procedures
Antenna Schematic 4884L/4084L (800-07128)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 149
Repair Procedures
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Repair Procedures
8.2.2. Elevation Drive Belt The same drive belt is used for both azimuth and elevation for 1.0m/1.2m/1.5m antennas.
Tools: None
Part Location: 1.0m/1.2m/1.5m: [12573040] Elevation Drive Belt Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The drive belt connects the elevation stepper motor with the timing pulley. See drawing 111596A item 10, on page 141.
3.0m: [12573707] Elevation Drive Chain The elevation drive chain (item 31) connects the elevation motor (item 28) to the elevation driver sprocket (item 21). See drawing 113218 on page 143. ACU
TAC-92 [ac 0 E000]
Antenna Elevation:
0°
[ac 0 J000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.0m/1.2m/1.5m: 1.
Slide the old drive belt off the large timing pulley.
2.
Place the new belt on the small sprocket on the elevation stepper motor.
3.
Slide the belt onto the large timing pulley by placing the belt at the lower side of the pulley and raising the antenna. This will draw the belt onto the pulley.
3.0m: 1.
Remove the four machine screws that attach the motor to the azimuth yoke and remove the motor.
2.
Replace the elevation drive chain.
3.
Replace the four machine screws and hardware using Locktite 242.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
8.2.3. Elevation Pot and Coupling Tools: 1/16" hex wrench 3 mm (1/8") flat blade screwdriver 6 mm (1/4") flat blade screwdriver 150 mm (6") crescent wrench 71 mm (2.8") tie wraps 127 mm (5") diagonal cutters 1/2" wrench
Part Location: 1.0m/1.2m/1.5m: [12573032] Elevation Pot [12573041] Elevation Pot Coupling Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The elevation pot is on the right elevation plate at the pivot between the elevation plate and the yoke. See drawing 111296A item 18.
3.0m: [12573703] Elevation Pot [12573704] Elevation Pot Coupling The elevation pot is on the opposite side from the trim weight of the elevation beam. See drawing 113218 item 33 (pot) and item 27 (coupling) on page 143. ACU
TAC-92 [ac 0 E000]
Antenna Elevation:
0°
[ac 0 J000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.0m/1.2m/1.5m: 1.
Cut the tie wraps on the wire from the pot to the screw terminals.
2.
Loosen the wires at the screw terminals and record the wire color-screw terminal assignment. See drawing 70930 on page 145, or 800-07128 on page 149.
3.
Loosen the set screw on the coupling [12573041]. This is nearest to the pot.
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4.
Remove the two screws holding the pot bracket onto the elevation plate.
5.
Loosen the nut holding the pot to its bracket and remove the pot.
6.
Place the new pot in the bracket and tighten the nut and lock washer that hold the pot to its bracket.
7.
Place the pot bracket on the elevation plate and attach it with the two machine screws. Use Locktite 242.
8.
Reattach the three wires from the pot to the screw terminal.
9.
Cinch the tie wraps around the wires from the pot. Cut off the tie wrap excess.
10. Perform the elevation alignment. See section 8.2.21., starting on page 199.
3.0m: 1.
Cut the tie wraps on the wire from the pot to the screw terminals.
2.
Loosen the wires at the screw terminals and record the wire color-screw terminal assignment. See drawing 113214 on page 147.
3.
Loosen the set screw on the coupling [12573704]. This is nearest to the pot.
4.
Remove the two screws holding the pot bracket onto the elevation plate.
5.
Loosen the nut holding the pot to its bracket and remove the pot.
6.
Place the new pot in the bracket and tighten the nut and lock washer that hold the pot to its bracket.
7.
Place the pot bracket on the elevation plate and attach it with the two machine screws. Use Locktite 242.
8.
Reattach the three wires from the pot to the screw terminal.
9.
Cinch the tie wraps around the wires from the pot. Cut off the tie wrap excess.
10. Perform the elevation alignment. See section 8.2.21., starting on page 199.
Elevation Pot [12573032]
Coupling [12593041] Locking Nut
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 153
Repair Procedures
8.2.4. Azimuth Stepper Motor and Drive Sprocket The same stepper motor is used for azimuth or elevation.
Tools: #2 Phillips screwdriver 6mm (1/4") flat blade screwdriver 3 mm (1/8") flat blade screwdriver 5/64" hex wrench 3/8" nut driver 5/16" nut driver 12 tie wraps Locktite 242
Part Location: 1.0m/1.2m/1.5m: [12573033] Azimuth Motor [12573039] Drive Sprocket Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The azimuth stepper motor is on the top of the azimuth yoke. See drawing 111168, item 4, on page 197.
3.0m: [12573705] Azimuth Motor The azimuth motor is located under the azimuth yoke. See item 37, drawing 113218 on page 143. Place the antenna to 0° (360° relative) to begin the repair. ACU
TAC-92
Antenna Elevation:
0°
[ac 0 J000]
[ac 0 E000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.0m/1.2m/1.5m: 1.
Remove the two screws holding the tension arm onto the azimuth pot.
2.
Slip off the azimuth drive belt from the large timing pulley at the center of the yoke.
3.
Remove the four machine screws that attach the azimuth bracket to the azimuth yoke (item 46).
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4.
Follow the wire from the stepper motor to the terminal strip (terminals 13, 14, 15, 16, 17 and 18). Cut the tie wraps from the wires.
5.
Loosen the stepper motor’s wires at the screw terminals. Record the wire color-screw terminal assignment. See drawing 70930 on page 145, or 800-07128 on page 149.
6.
Remove the four machine screws on top of the stepper motor bracket and separate the bracket from the motor.
7.
Route the wires from the new stepper motor back to the screw terminals.
8.
Attach the mounting bracket to the top of the new stepper motor using Locktite 242.
9.
Attach the motor sprocket to the shaft (loosely).
10. Tighten the screw terminals for the wires coming in from the stepper motor. 11. Cinch the tie wraps around the wires coming from the stepper motor. Cut off the wrap excess. 12. Attach the mounting bracket on to the yoke using the four machine screws. 13. Replace the azimuth drive belt. See section 8.2.6., starting on page 168. 14. Attach the azimuth pot guide arm. 15. Align the azimuth drive belt (see Section 8.2.24, page 216). 16. Perform the azimuth alignment and belt tension adjustment (see Section 8.2.20, starting on page 194).
3.0m: 1.
Remove the chain tensioner spring (item 39).
2.
Remove the four machine screws that attach the azimuth bracket to the azimuth yoke (item 37).
3.
Slip off the azimuth drive chain from the motor.
4.
Follow the wire from the stepper motor to the terminal strip (terminals 13, 14, 15, 16, 17 and 18). Cut the tie wraps from the wires.
5.
Loosen the stepper motor’s wires at the screw terminals. Record the wire color-screw terminal assignment. See drawing 113214 on page 147.
6.
Remove the machine screws of the stepper motor bracket and separate the bracket from the motor.
7.
Route the wires from the new stepper motor back to the screw terminals.
8.
Attach the mounting bracket to the new stepper motor using Locktite 242.
9.
Tighten the screw terminals for the wires coming in from the stepper motor.
10. Cinch the tie wraps around the wires coming from the stepper motor. Cut off the wrap excess. 11. Replace the azimuth drive belt. 12. Attach the mounting bracket on to the yoke using the four machine screws. 13. Reattach the chain tensioner spring. 14. Perform the azimuth alignment. See section 8.2.20., starting on page 194.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 155
Repair Procedures
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Repair Procedures
General Assembly 3.0 m Model SAR-120 (116536)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 157
Repair Procedures
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Repair Procedures
General Assembly 1.5 m Model SAR60 (70931)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 159
Repair Procedures
Page 160 SeaSpace Corporation
Repair Procedures
Stabilized Antenna Pedestal Assembly Model 4554L (110677)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 161
Repair Procedures
Page 162 SeaSpace Corporation
Repair Procedures
1.0 m Stabilized Antenna Pedestal Assembly Model 4084 L (111598-A)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 163
Repair Procedures
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Repair Procedures
8.2.5. Azimuth Pot and Drive Sprocket Tools: 150 mm (6") crescent wrench 6 mm (1/4") flat blade screwdriver 3 mm (1/8") flat blade screwdriver 0.078" (5/64") hex wrench 127 mm (5") diagonal cutters 12 tie wraps PROM Puller PROM Inserter Grounding Wrist Strap
Part Location: 1.0m/1.2m/1.5m: [12573031] Azimuth Pot [12573039] Drive Sprocket Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The azimuth pot (item 7 of drawing 111168, on page 197) is located between the azimuth stepper motor (item 4 of drawing 111168, on page 197) and the timing pulley (item 23 of drawing 111168, on page 197).
3.0m: [12573701] Azimuth Pot The azimuth pot is located under the azimuth yoke. See item 33 on drawing 113218, page 143. ACU
TAC-92 [ac 0 E000]
Antenna Elevation:
0°
[ac 0 J000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.0m/1.2m/1.5m: 1.
Remove the two screws holding the tension arm into the drive belt at the azimuth pot.
2.
Remove the two machine screws holding the pot bracket onto the azimuth yoke.
3.
Loosen the two set screws holding the sprocket onto the pot. Remove the sprocket.
4.
Loosen the nut holding the pot to its bracket.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
5.
Trace the pot’s wires back to the screw terminals. Cut the tie wraps around the wires.
6.
Loosen the wires at the terminal strip. Record the wire color-screw terminal assignment. See drawing 70930 on page 145, or 800-07128 on page 149. Remove the old pot.
7.
Mount the new pot onto its bracket and tighten the nut on the top of the pot.
8.
Route the pot wires back to the screw terminals.
9.
Attach the sprocket on top of the pot. The set screws should loosely hold the sprocket to the pot.
10. Attach the pot bracket to the azimuth yoke with the two machine screws and hardware using Locktite 242. 11. Slip on the azimuth drive belt. See section 8.2.6., starting on page 168. 12. Attach the pot tension arm using the two machine screws. 13. Adjust the pot sprocket so that it is evenly centered on the drive belt. 14. Attach the wires from the pot to the terminal strip. 15. Cinch the tie wraps around the wires from the pot. Cut off the tie wrap excess. 16. (ACU only) Replace the PROM U6 of the ACU logic board as follows: a. Turn off power to the receiver chassis. b. Remove the four screws that hold the front ears of the ACU onto the chassis. c.
Slide the ACU forward and remove it from the chassis.
d. Disconnect all cables connected to the ACU. e. Facing the rear of the ACU, remove the four screws that hold the sheet metal plate at the rear of the ACU. Remove this plate. f.
Two printed circuit cards should now be exposed in the card cage. Remove the logic board (lower board).
g. The PROM U6 of drawing 110759-A should be removed and the PROM supplied with azimuth pot inserted if the PROM numbers are different. h. Insert the logic board back in the ACU making sure it seats firmly. i.
Replace the rear sheet metal panel at the back of the ACU.
j.
Reconnect all cables on the ACU.
k. Slide the ACU back in the receiver chassis. l.
Replace the four screws that hold the front ears onto the receiver chassis.
m. Turn on power to the receiver chassis. 17. Perform the azimuth alignment (section 8.2.20., starting on page 194).
3.0m: 1.
Remove the two machine screws (item 52 of drawing 113218 on page 143) holding the azimuth pot bracket onto the azimuth yoke (item 1).
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2.
Loosen the two set screws holding the sprocket onto the pot. Remove the sprocket (item 34).
3.
Loosen the nut holding the pot to its bracket.
4.
Trace the pot’s wires back to the screw terminals. Cut the tie wraps around the wires.
5.
Loosen the wires at the terminal strip. Record the wire color-screw terminal assignment. See drawing 113214 on page 147. Remove the old pot.
6.
Mount the new pot onto its bracket and tighten the nut on the top of the pot.
7.
Route the pot wires back to the screw terminals.
8.
Attach the sprocket (item 34)on top of the pot. The set screws should loosely hold the sprocket to the pot.
9.
Slip on the azimuth drive belt.
10. Attach the pot bracket to the azimuth yoke with the two machine screws and hardware using Locktite 242. 11. Attach the wires from the pot to the terminal strip.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 167
Repair Procedures
8.2.6. Azimuth Drive Belt Tools: 6 mm (1/4") flat-blade screwdriver
Part Location: 1.0m/1.2m/1.5m: [12573040] Azimuth Drive Belt Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The azimuth drive belt is on top of the azimuth yoke (item 6 of drawing 110677 on page 161).
3.0m: [12573706] Azimuth Drive Chain The azimuth drive chain (item 36) connects the azimuth motor (item 37) to the azimuth driver sprocket (item 10). See drawing 113218 on page 143. ACU
TAC-92 [ac 0 E000]
Antenna Elevation:
0°
[ac 0 J000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.0m/1.2m/1.5m: 1.
Remove the two screws holding the tension arm onto the drive belt at the azimuth pot.
2.
Slip the drive belt off the large timing pulley and remove the belt.
3.
Slip a new drive belt over the motor sprocket, the pot sprocket, and then the large timing pulley.
4.
Replace the tension arm pressing the drive belt onto the azimuth pot.
5.
Align the drive belt. See section 8.2.24, page 216.
6.
Perform the azimuth alignment. See section 8.2.20, starting on page 194.
3.0m: 1.
Remove the chain tensioner spring (item 39 of drawing 113218 on page 143).
2.
Remove the four machine screws that attach the azimuth bracket to the azimuth yoke (item 37).
3.
Slip off the azimuth drive chain from the motor.
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4.
Replace the azimuth drive belt.
5.
Attach the mounting bracket on to the yoke using the four machine screws.
6.
Reattach the chain tensioner spring.
7.
Perform the azimuth alignment and belt tension adjustment. See section 8.2.20, starting on page 194.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
8.2.7. Gyro Frame [12573001] (1.0/1.2m only) Tools: 3 mm (1/8") flat blade screwdriver 7/16" box wrench 7/16" nut driver
Part Location: The gyro frame is located below the azimuth yoke. See item 7 of drawing 110677, on page 123, and drawing 800-07100 on page 171 for an overhead view.
Procedure: 1.
Turn off power at the Antenna Control Unit (ACU) or TAC-92
2.
At the top of the gyro frame are two screw terminal blocks. Unscrew the wires coming out of the blocks and going into the gimble assembly (2 red or 2 black wires at each terminal). See drawing 800-07100 on page 171.
3.
Undo the four 7/16" nuts holding the gyro frame into the gimble assembly.
4.
lift the gyro frame off the four bolts. The frame weighs 13 kg (28 lbs.).
5.
Remove the white spaces washers from the four bolts.
6.
Install the site spacer washers that are provided with the replacement gyro frame. Place an equal number of spacers on each bolt.
7.
Mount the replacement gyro frame on the four bolts. Align the frame so that the washer outline marked on the gyro frame is centered around each bolt.
8.
Secure the gyro frame to the gimble assembly with a nut and washer at each bolt. Use Locktite 242 during assembly.
9.
Reattach the red and black wires to the gyro frame according to drawing 800-07100.
10. Turn on power to the TAC-92/ACU. Verify the checklist in section 4.3.1.1., step C, starting on page 87. Run the antenna checks in section 3.2.1.5. on page 40. 11. Turn on power to the TeraScan System. 12. To balance the gyro frame: a.
Power should be off.
b. The antenna should be balanced. See section 8.2.22., page 202) c.
Slowly rotate the gyro frame around the antenna. i.
If the antenna tips away from its level position and toward the gyro frame, remove on washer from each of the four gyro frame bolts (steps 6 and 7).
ii.
If the antenna tips away from its level position and away from the gyro frame, add one washer to each of the four gyro frame bolts.
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Gyro Frame Top View (800-07100)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 171
Repair Procedures
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Repair Procedures
8.2.8. Antenna Wiring Harness [12573034] [12573094] [12573708] This procedure replaces the wiring harness of a 1.0 m (4084), 1.2 m (4884), 1.5 m (SAR60), or 3.0 m (SAR-120) antenna up through the middle of the pedestal.
Tools: 3 mm (1/8”) flat blade screwdriver tie-wraps 10 cm (4”) diagonal cutters
Part Location: 1.0m/1.2m/1.5m: The wiring harness runs from the screw terminals at the base of the antenna to the screw terminals at the azimuth yoke. Refer to item 6 of drawing 110677 on page 123. Refer to drawing 111168 on page 197 for the wiring from the azimuth yoke. For an illustration of the units on the elevation sidepans refer to drawing 111596, on page 141. Part [12573034] is used with 1.0 m (4084) and 1.2 m (4884) antennas. Part [12573094] is used with the 1.5 m (SAR60) antenna.
3.0m: Part [12573708] is used with the 3.0 m (SAR-120) antenna. See drawing 113214 on page 147.
Procedure: The wiring harness is divided into two parts: (1) the wiring that goes up the middle of the center post of the antenna to the azimuth yoke, and (2) the wiring from the azimuth yoke to the side pan/ elevation pan.
!
Warning
110 VAC IS PRESENT AT SOME OF THE SCREW TERMINALS ON THE ANTENNA AND AT THE BACK OF THE RECEIVER CHASSIS. 1.
Turn off the power to the ACU or TAC-92.
2.
To replace wiring to an elevation side pan unit: a. Cut the tie wraps from the azimuth yoke to the side pan unit. b. Separate the affected wires from the bundle.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
c. Replace the affected wires with the new wires one wire at a time. d. Replace the tie wraps. 3.
To replace wiring in the center column: a. Label all wires at the base of the antenna. b. Loosen the wire from the screw terminal blocks at the base of the antenna. c. Attach a pulling wire to the loose wires. d. Draw the loose wires up through the column until the pulling wire is exposed above the azimuth drive sprocket. e. Cut the tie wraps to the azimuth yoke screw terminal block. f.
Separate the affected wires from the bundle.
g. Replace the affected wires. Replace the tie wraps. h. Attach the pulling wire to the bundle. i.
Carefully draw the bundle back into the column using the pull wire.
j.
Reattach all wires at the base of the antenna. See drawings 110742, 800-07126 on page 61, and 800-07127 on page 67 for antennas with separate feed and downconverter. See drawings 70930 on page 145, and 70931 on page 159 for antennas with integrated feed/LNA/ downconverter. 3.0 m: Also see drawing 113214 on page 147.
4.
Turn on power to the ACU or TAC- 92. Perform the checks in section “3.2.1.5. Antenna/ Pedestal Mechanical Checklist” on page 40.
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Repair Procedures
8.2.9. Separate Downconverter [70151xxx] (HD100) Tools: 5/32” hex wrench
Part Location: 1.0m/1.2m/1.5m: Facing the antenna, the downconverter is located on the right side elevation plate (item 20 of drawing 111596A on page 141).
3.0m: The downconverter is mounted at the base of the support post. Refer to item 29 of drawing 116536, on page 157.
Procedure: 1.
Turn off power to the TAC-92/ACU and let the gyro flywheels stop (if gyro flywheel is used).
2.
Turn off the receiver.
3.
Remove the signal connectors from the bottom of the downconverter.
4.
Remove the four bolts that hold the old downconverter onto its mounting plate. Be careful to support the downconverter and the antenna when the last bolt is removed. The antenna will tip to the other side.
5.
Place the new downconverter in position and reattach it to the mounting plate. Each lock washer should contact the elevation side plate (no flat washer).
6.
Reattach the signal connectors to the downconverter. The HRPT (L-band) Input signal cable is attached to the outermost connector. The DMSP (S-band) Input signal cable is next to the HRPT cable (optional). The Output signal cable is attached to the connector next to the power connector.
7.
Rebalance the antenna. For 1.0m/1.2m/1.5m antennas, see section 8.2.22. on page 202 .
8.
Turn on power to the receiver.
9.
Turn on power to the TAC-92/ACU.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 175
Repair Procedures
8.2.10. Separate Feed/LNA [12763xxx] [12799001] Tools: 7/16” nut driver 150 mm (6”) crescent wrench
Part Location: 1.0m/1.2m/1.5m: The feed is located at the focal point of the dish and supported by three or four feed struts that are bolted to the dish. See drawings 10677 on page 161 and 12763 on page 177 for outline.
3.0m: See drawing 12799001 on page 179.
Procedure: 1.
Turn off power to the TAC-92/ACU and let the gyro flywheels stop (if gyro flywheels used).
2.
Turn off the receiver.
3.
Rotate the azimuth yoke around so that the feed horn is visible through the radome hatch.
4.
Loosen the signal connector (small SMA(s)) and remove the cable(s) from the feed. If this is a dual feed, note which cable is L-band and which is S-band.
5.
Loosen the power connector (MS3106) and remove the cable from the feed.
6.
Remove the hardware holding each feed strut to the feed.
7.
Remove the old feed. Hold the antenna dish to keep it from moving.
8.
Place the new feed in the same position as the old feed. Align the feed so that the power and signal cables come up the feed strut and go directly into the feed connectors.
9.
Attach each feed strut to the feed.
10. Attach the power connector to the feed. Note that the connector is keyed. 11. Carefully attach the signal connector(s) to the feed. Hand tighten and then lightly tighten by wrench. 12. Rebalance the antenna. See section 8.2.22., page 202. 13. Turn on power to the receiver. 14. Turn on power to the TAC-92/ACU.
Page 176 SeaSpace Corporation
Repair Procedures
Polar Tracking Feed/LNA (12763xxx)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 177
Repair Procedures
Page 178 SeaSpace Corporation
Repair Procedures
SCD Feed/LNAs (12799001)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 179
Repair Procedures
Page 180 SeaSpace Corporation
Repair Procedures
8.2.11. Integrated Feed/LNA/Downconverter Tools: #2 Phillips screwdriver
Part Location: The integrated feed/LNA/DC is located at the focal point of the dish and supported by four feed struts that are bolted to the dish. See item 9 of drawing 70931 on page 159.
Procedure: 1.
Turn off power to the TAC-92.
2.
Turn off the receiver.
3.
Rotate the azimuth yoke around so that the feed is visible through the radome hatch.
4.
Loosen the signal connector (N male) and remove the cable from the feed. Detach the telemetryselect cable (if used).
5.
Remove the hardware holding the feed to its mounting.
6.
Remove the old feed. Hold the antenna dish to keep it from moving.
7.
Place the new feed in the same position as the old. Align the feed so that the signal cable comes up the feed strut and goes directly into the feed connector.
8.
Attach the feed to the mounting ring.
9.
Attach the signal connector to the feed. Attach the telemetry-select cable (if used).
10. Rebalance the antenna. See section 8.2.22., page 202. 11. Turn on power to the receiver. 12. Turn on power to the TAC-92.
The three types of integrated feed/LNA/DC are: [12667004]
single-telemetry: HRPT (L-band) only (see drawing 70928006 on page 183)
[12218001]
dual-telemetry: HRPT (L-band) and DMSP (S-band) (see drawing 70928007 on page 187).
[12218002]
single-telemetry: HRPT (L-band) only (see drawing 70928010 on page 185). Replaces [12667004].
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 181
Repair Procedures
Page 182 SeaSpace Corporation
Repair Procedures
HRPT Feed/LNA/Downconverter [70928006]
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 183
Repair Procedures
Page 184 SeaSpace Corporation
Repair Procedures
HRPT Feed/LNA/Downconverter [70928010]
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 185
Repair Procedures
Page 186 SeaSpace Corporation
Repair Procedures
Integrated Dual HRPT/DMSP Feed/LNA/Downconverters (70928007)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 187
Repair Procedures
Page 188 SeaSpace Corporation
Repair Procedures
Dual Feed Block Diagram (70928008)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 189
Repair Procedures
HRPT (L-Band) Specifications [12218001] / [12218002] Preselector Insertion loss: Passband: -3dB: -3dB: bandwidth: Center frequency: Cell phone rejection:
0.4 dB 85 MHz (1640 - 1725) 1620 and 1750 MHz 130 MHz 1700 MHz -80 dB @ 850 MHz -15 dB @ 1800 MHz
Gain: Noise figure
38 dB 0.7 dB
LNA
Four-Pole Filter Bandwidth: -3dB bandwidth: Center frequency: Insertion loss:
1680 - 1714 MHz @ 1dB 56 MHz (1668-1724) 1697 MHz 1.5 dB
Downconverter Gain: IF center frequency: IF frequency range: Noise figure: Lo Frequency: Lo Stability:
16 dB 1702.5 MHz to 137.5 MHz 112-162 MHz approx. 14 dB 1565.00 MHz: ±2.5 ppm (-30°C to +65°C)
Supply Voltage: 10-15 VDC (power supplied on center conductor of IF coax)
Operating Temperature Range: -40°C to +65°C
Overall: Noise Figure: Gain: -3 dB bandwidth
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1.0 - 1.2 dB 52 - 55 dB 50 MHz
Repair Procedures
DMSP (S-Band) Specifications [12218001] Preselector Insertion loss: Passband: -3dB: -3dB: bandwidth: Center frequency: Cell phone rejection:
0.5 dB 2166 - 2315 MHz 2132 and 2350 MHz 218 MHz 2240 MHz -80 dB @ 850 MHz -10 dB @ 1800 MHz -20 dB @ 2-2.5GHz PTS
Gain: Noise figure
34 dB 0.9 dB
LNA
Four-Pole Filter Bandwidth: -3dB bandwidth: Center frequency: Insertion loss:
2204 - 2285 MHz @ 1dB 100 MHz (2190 - 2290) 2250 MHz 2.0 dB -50 dB @ 2.12 - 2.4 GHz (280 MHz)
Downconverter Gain: IF center frequency: Tuneable frequencies: IF frequency range: Noise figure: Lo Frequency: Lo Stability:
16 dB 2252.5 MHz to 137.5 MHz 2252.5 89 - 170 MHz approx. 14 dB 2115.00 MHz: ±2.5 ppm (-30°C to +65°C)
Supply Voltage: 10-15 VDC (power supplied on center conductor of IF coax)
Operating Temperature Range: -40°C to +65°C
Overall: Noise Figure: Gain: -3 dB bandwidth
1.2 - 1.4 dB 48-50 dB 91 MHz
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 191
Repair Procedures
8.2.12 Power Injector [12791001] Tools: #2 Phillips screwdriver
Part Location: The power injector is located on the elevation side pan. See item 11 of drawing 70931 on page 159.
Procedure: 1.
Turn off power to the TAC-92.
2.
Turn off the receiver.
3.
Remove the cable from the power injector. Note which coax cable goes to the receiver and which cable goes to the feed. See drawing 70928009 on page 193.
4.
Remove the hardware holding the power injector to the elevation side pan.
5.
Remove the power injector. Hold the antenna to keep it from moving.
6.
Place the new power injector in the same position as the old.
7.
Reattach the power injector to the elevation side pan.
8.
Reattach the cables to the power injector.
9.
Turn on power to the receiver.
10. Turn on power to the TAC-92.
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Repair Procedures
Power Injector (70928009)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 193
Repair Procedures
8.2.20. Azimuth Alignment and Azimuth Belt Tension Adjustment This procedure aligns the azimuth pot so that when the antenna azimuth is 360°, the Antenna Control Unit (ACU) or TAC-92 will read 0°. Perform antenna control cable calibration (section 8.2.23. on page 207) before making this adjustment.
Tools: 3 mm (1/8”) flat-head screwdriver 5/64” hex wrench 3/16” hex wrench 2 portable two-way radios force gage, 0–3 kg (0–5 lb) 15 cm (6") ruler
Part Location: Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The azimuth pot is on top of the azimuth yoke. See drawing 111168, item 7, on page 197. ACU
TAC-92 [ac 0 E000]
Antenna Elevation:
0°
[ac 0 J000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.
Make sure the two set screws on the azimuth pot are loose.
2.
Loosen the clamping machine screw at the side of the large timing pulley. The pulley and belt should rotate without turning the azimuth yoke.
3.
Looking down from directly overhead, align the azimuth yoke so that it is parallel to the antenna base plate. The dish should point roughly true north.
4.
Rotate the timing pulley until the bolt penetrating the pulley is aligned with the rubber bumper at the left side of the azimuth yoke. Tighten the clamping hex head machine screw at the side of the timing pulley using Locktite 242.
5.
Turn on the ACU.
!
Warning
110 VAC IS PRESENT AT SOME OF THE SCREW TERMINALS ON THE ANTENNA AND AT THE BACK OF THE RECEIVER CHASSIS. EXERCISE CAUTION WHILE ADJUSTING THE POT. Page 194 SeaSpace Corporation
Repair Procedures
6.
Place a screwdriver in the slot in the top of the azimuth pot.
7.
While keeping the timing pulley bolt aligned with the rubber bumper, rotate the screwdriver in the pot’s slot until the ACU azimuth reading is 0°.
8.
Tighten the set screws on the pot’s sprocket. If the ACU’s reading changes, repeat steps 7 and 8.
—————————————————————ACU————————————————— A final adjustment of azimuth reading can be made by rotating the azimuth pot on the motor driver board until the azimuth reading is zero. This pot is next to the elevation pot on the motor driver board. 9.
Perform a sun alignment to verify correct azimuth position.
10. Belt Tension adjustment Check the drive belt tension by holding the azimuth switch on the ACU UP or DOWN. The azimuth yoke should move at 6° per second. If it moves slowly (or not at all), adjust the belt tension as follows: a. Loosen the four screws at the sides that attach the azimuth motor bracket to the azimuth yoke. b. Slide the bracket slightly towards the azimuth pot, tighten the screws, and retest driving the azimuth yoke. Repeat until the yoke moves freely.
————————————————————TAC-92————————————————— 11. A final adjustment can be made by: a. Press RESET on the ACU. b. Press the MODE button until AZ XXXX EL nnnn appears. c.
The error in azimuth is calculated as counts = error in degrees * 6. Example: -0.5° error Counts = -0.5 * 6 Counts = -3.0 Error and Counts can be positive or negative.
d. Press 7979 and ENTER on the keypad. e.
Press ENTER until the entry AZ TRIM appears on the display. Add the counts correction from step c to the current reading. Example: Display reads 100. 97 ENTER
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
f.
The display should read the initial value from step e plus the correction. Example: AZ TRIM 97
g. Press ENTER until SAVE NEW PARAMETERS appear on the display. Press the UP button. Press ENTER until the SEA TEL logo appears. h. Press RESET on the ACU. 12. Perform a sun alignment to verify correct azimuth position. See section 4.3.2.1, starting on page 91. 13. Belt tension adjustment: Check the drive belt tension by holding the antenna, AZ UP or DOWN. The azimuth yoke should move at 6° per second. If it moves slowly (or not at all), adjust the belt tension as follows: a. Loosen the four screws at the sides that attach the azimuth motor bracket to the azimuth yoke. b. Slide the bracket slightly towards the azimuth pot. Tighten the screws, and retest driving the azimuth yoke. Repeat until the yoke moves freely. The belt should not flex excessively. Drive Belt
Deflection
Force
Azimuth Motor
5mm (0.2")
0.7 kg (1.5 lb)
Azimuth Belt Deflection
5mm (0.2")
Page 196 SeaSpace Corporation
Repair Procedures
AZ Yoke Assembly (111168)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 197
Repair Procedures
Page 198 SeaSpace Corporation
Repair Procedures
8.2.21. Elevation Alignment and Elevation Belt Tension Adjustment This procedure calibrates the elevation pot so that when the antenna is at 0 degrees elevation, the Antenna Control Unit (ACU) or TAC-92 will read 0°. Perform antenna control cable calibration (section 8.2.23. on page 207) before performing this adjustment.
Tools: 1/16” hex wrench 1 bubble level 2 portable two-way radios force gage, 0–3 kg (0–5 lb) 15 cm (6") ruler
Part Location: Facing the antenna pedestal, the antenna yoke is positioned with the downconverter on the right. The elevation pot is on the right elevation plate at the pivot between the elevation plate and the yoke. See drawing 111596A item 18, on page 141. ACU TAC-92 Antenna Elevation:
0°
[ac 0 J000]
[ac 0 E000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.
Tighten the set screw on the coupling [12573041] that is nearest to the elevation pot.
2.
Loosen the set screw on the coupling that is nearest to the elevation pivot. The coupling should turn freely.
3.
Turn on the TAC-92 /ACU. Allow the gyros to stabilize the antenna.
!
Warning
110 VAC IS PRESENT AT SOME OF THE SCREW TERMINALS ON THE ANTENNA AND AT THE BACK OF THE RECEIVER CHASSIS.
EXERCISE CAUTION WHILE ADJUSTING THE POT.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 199
Repair Procedures
4.
Lower the antenna manually by using the switch on the ACU. (ACU: select elevation on the rotary switch. TAC-92: select antenna, EL on the display.) When the antenna elevation is near 0°, place the bubble level on the elevation plate above the downconverter.
5.
Adjust the antenna using the manual switch until the bubble level reads 0° (bubble is in the center of the level).
6.
Rotate the coupling until: a. the bubble level reads 0° and b. the ACU elevation reads approximately 0.0°.
7.
Tighten the set screw on the coupling nearest the elevation pivot. Check if the elevation reads 0°. ACU: final adjustment of the reading can be made by rotating the elevation pot on the motor driver board (this pot is right-most of the four pots at the left rear of the board). TAC-92: final adjustment of the reading can be made as follows: a. Press RESET on the TAC-92 front panel. b. Press the MODE button until AZ XXXX EL nnnn appears. c.
The error in elevation is calculated as counts = error in degrees * 6. Example: +0.5° error Counts = +0.5 * 6 Counts = +3.0 Error in counts can be positive or negative.
d. Press 7979 and ENTER on the keypad. e.
Press ENTER until the entry EL TRIM appears on the display. Add the counts correction from step c to the current reading. Example: Display reads 100. Enter 103
f.
The display should read the initial value from step e plus the correction from step c. Example: EL TRIM 103
g. Press ENTER until SAVE NEW PARAMETERS appears on the display. Press the up button (^). Press ENTER until the SEA TEL logo appears. h. Press RESET on the TAC-92 front panel. i.
Remove the bubble level from the elevation plate.
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Repair Procedures
8.
Belt tension adjustment: Check the drive belt tension by using the up or down buttons (^ and v) to change the antenna elevation. The elevation assembly should move at 6° per second. If it moves slowly (or not at all), adjust the belt tension as follows: a. Loosen the four screws at the sides that attach the elevation motor to the side pan. b. Slide the bracket slightly towards the drive pulley. Tighten the screws, and retest driving the elevation motor. Repeat until the elevation assembly moves freely. The belt should not flex excessively.
Drive Belt
Deflection
Force
Elevation Motor
5mm (0.2")
0.7 kg (1.5 lb)
Elevation Belt Deflection
5mm (0.2")
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 201
Repair Procedures
8.2.22. Antenna Balancing The antenna must be balanced so that there is no motion in any of the three planes of the antenna. The azimuth yoke cannot be balanced for land-based antennas.
Tools: 2 bubble levels 2 3/4” open ends wrenches 7/16” nut driver 150 mm (6”) crescent wrench Trim weights (1/2, 1, 3, 5, 7 ounce) [12596xxx] (1.0m/1.2m/1.5m only)
Part Location: 1.0m/1.2m/1.5m: The trim rods are located: a.
On top of the azimuth yoke (item 4 of drawing 111168, page 197).
b.
Above the downconverter (item 28 of drawing 111596A, page 141).
c.
Next to the elevation pot (item 18 of drawing 111596A, page 141).
The balancing weights are located on the left side elevation plate and below the downconverter on the right side elevation plate.
3.0m: The two trim rods are located on the left elevation beam, item 11, drawing 113217. ACU
TAC-92 [ac 0 E000]
Antenna Elevation:
0°
[ac 0 J000]
Antenna Azimuth:
360°
[ac 0 K3600] [ac 0 A3600]
ACU:
OFF
Procedure: 1.0m/1.2m/1.5m: 1.
Turn off power to the TAC-92 /ACU.
2.
Remove the elevation drive belt (item 10 of drawing 111596A, page 141).
3.
Place the two levels on the azimuth yoke (item 6 of drawing 11067,7 page 161).
4.
Adjust the trim rod until the azimuth yoke is level. The two 1/2 - 13 nuts may be moved to the opposite side of the bracket. If the antenna does not balance after adjusting the trim rod over its range, see step 11. Omit this step for land-based antennas.
5.
Tighten the two 1/2 - 13 nuts that hold the trim rod to the azimuth yoke.
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Repair Procedures
6.
Remove the two bubble levels from the yoke.
7.
Adjust the trim rod closest to the dish so that there is no motion when the dish is positioned at 0° elevation. The two 1/2 - 13 nuts may be moved to the opposite side of the bracket. If the antenna does not balance after adjusting the trim rod over its range, see step 10.
8.
Tighten the two 1/2 - 13 nuts that hold the trim rod to the elevation side plate.
9.
Position the antenna at 90° elevation. Adjust the trim rod above the elevation pot so that there is no motion to the dish. The two 1/2 - 13 nuts may be moved to the opposite side of the bracket. If the antenna does not balance after adjusting the trim rod over its range, see step 10.
10. Tighten the two 1/2 - 13 nuts that hold the trim rod to the elevation side plate. 11. If the antenna does not balance using the trim rods in steps 4, 6, or 8, additional weights must be placed on the elevation side plates of the antenna or at the bolt on the dish, and steps 3 to 9 repeated. Add or subtract weights until the antenna is almost level and then adjust the level using the trim rods. 12. Replace the elevation drive belt. 13. Turn the power back on to the TAC-92/ACU.
3.0m: For the following steps, refer to drawing 113218: 1.
Loosen the four bolts (item 59) that retain the elevation drive motor mounting plate (item 29). Slide the motor up, which will release the tension in the elevation drive chain. Now, remove the two lower bolts and tilt the motor forward so that the chain can be removed from the drive sprocket (item 30).
For the following steps, refer to drawing 113217: 2.
Point the antenna toward the horizon. If the antenna moves up, there is not enough weight on the dish end of the elevation beam. There is a trim rod mounted on the left elevation beam which will be level with the ground when the antenna is pointed at the horizon (referred to as the horizon trim rod). This rod should be moved in the appropriate direction to obtain antenna balance front-to-back, that is, the antenna stays pointing toward the horizon when it is placed there.
Note: It is not essential that the system be perfectly balanced.
If the antenna moves very slowly up or down from where it is placed, it can be considered balanced well enough.
3.
Point the antenna toward the zenith. If the antenna falls in one direction or the other, the trim rod (referred to as the zenith trim rod) which is now level, should be adjusted so that the antenna stays where it is placed. The same note as above applies here also.
4.
Replace the elevation drive chain on the drive sprocket of the motor. Reinstall the two ¼" bolts that retain the drive motor mounting plate to the azimuth yoke. Before tightening the four bolts, slip a screwdriver between the azimuth yoke and the elevation motor plate to apply tension to the elevation chain. Tighten the four bolts that support the elevation motor mounting plate.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 203
Repair Procedures
Page 204 SeaSpace Corporation
Repair Procedures
3.0 m Equipment Frame Assembly (113217)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 205
Repair Procedures
Page 206 SeaSpace Corporation
Repair Procedures
8.2.23. Antenna Control Cable Calibration 8.2.23.1. Antenna Control Cable Calibration - TAC-92 Tools: none
Part Location: TAC-92: none - This procedure updates the TAC-92 PROM.
Procedure: Automatic Calibration—TAC-92 PROM 1.60 or greater
Note:
This calibration procedure is for antennas that have a travel of 180 degrees azimuth. This procedure automatically adjusts the ELSCALE and AZSCALE parameters of the TAC-92 to compensate for losses in the control cable. This procedure must be done after installation to guarantee accuracy of position readout.
1.
Press RESET on the TAC-92 front panel.
2.
Press the MODE button until AZ XXXX EL nnnn appears on the display.
3.
Press 7, 9, 7, 9, ENTER on the TAC-92 front panel.
4.
Press the MODE button until ELSCALE is displayed.
5.
Press 8, 2, 9, 2.
6.
Press ENTER until AZSCALE is displayed.
7.
Press 4, 1, 9, 0.
8.
Press ENTER until SAVE SETUP PARAMETERS is displayed.
9.
Press the UP arrow key (Ç).
10. Press ENTER to save the default scale parameters. 11. Press the ANTENNA key twice to select the azimuth (only) display. 12. Press 6, 2, 0, N/S, ENTER. This should cause the antenna to move to 620 relative azimuth. 13. Press the ANTENNA button to select the elevation (only) display. 14. Press 9, 0, ENTER. This should cause the antenna to move to 90° elevation. 15. Wait for the antenna to stop moving (SEARCHING light goes off). If the SEARCHING light is still flashing when the antenna stops moving, press RESET. 16. Press the MODE button until AUTO CAL is displayed. 17. Press the UP arrow button (Ç) and ENTER to start the calibration process. The display will count down form 3000 to 0000.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 207
Repair Procedures
18. When the countdown has completed, press the MODE button until AZ xxxx EL nnnn appears. 19. Press 7, 9, 7, 9, ENTER. 20. Press ENTER until SAVE SETUP PARAMETERS is displayed. 21. Press the UP arrow button (Ç) . 22. Press ENTER to save AZSCALE and ELSCALE. 23. Record the new settings in the TAC-92 ( see Section 8.2.36, page 228).
Note:
If the Unwrap and Error lights turn on or the error value is 64, the antenna was not moved to azimuth 620° or elevation 90° before starting AUTO CAL.
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Repair Procedures
8.2.23.2. Antenna Control Cable Calibration - ACU Tools: 3 mm (1/8”) flat blade screwdriver 5/32” hex wrench (door) #2 Phillips screwdriver
Part Location: Pots:On the motor board (top board at back of the Antenna Control Unit (ACU) marked “Zero” and “Span”). Screw Terminal Strip:At the base of the antenna pedestal. Terminals 9, 10, & 12 on TB-1 are to the left of the wires going into the antenna column.
Procedure:
!
Warning
110 VOLTAGE ON TERMINALS OF THE ANTENNA. EXERCISE CAUTION. 1.
Turn on the power to the ACU
2.
Set the ACU selector to ELEVATION. At the rear panel on the ACU press the calibration switch on the rear corner of the logic board (the button on the right side of the lower board at the rear of the ACU) in hole in rear back plate.
3.
Locate the azimuth pot signal wire at pin 9 on the screw terminal strip at the antenna pedestal inside the radome. Remove the wire leading from the screw terminal strip to the ACU marked (9).
4.
Connect the wire from step 3 to pin 10 on the screw terminal strip. Adjust the ZERO pot on the motor drive board (top board, left side at the back of the ACU; the pot is the left-most pot at the left of the board) until the display reads 000.1.
5.
Connect the wire from step 3 to pin 12 on the screw terminal strip. Adjust the SPAN pot (this pot is next to the ZERO pot) on the motor driver board until the display reads 409.4.
6.
Reconnect the wire from step 3 to 9 on the screw terminal strip.
7.
Cycle power on the ACU.
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Page 210 SeaSpace Corporation
Repair Procedures
TAC-92 (112909-C)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 211
Repair Procedures
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Repair Procedures
ACU PCB Assembly (112228)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 213
Repair Procedures
Page 214 SeaSpace Corporation
Repair Procedures
ACU PCB Schematic (112226)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 215
Repair Procedures
8.2.24. Azimuth Drive Belt Alignment (1.0m/1.2m/1.5m) This procedure aligns the azimuth drive belt so that it does not rub on the sides of the sprockets.
Tools: 3/16” hex wrench (drive sprocket) 5/64” hex wrench (set screw on sprocket) #2 Phillips screwdriver Locktite 242
Part Location: The azimuth motor, belt, and sprockets are located on top of the azimuth yoke. See drawing 111168, page 197, and Figure 4, page 217.
Procedure: 1.
Turn off power to the antenna.
2.
Examine the azimuth pot sprocket. Move the drive belt up or down to center it in the sprocket so that it does not rub the sprocket rim. The drive sprocket itself must clear the top of the motor by at lease 0.5mm (0.02")
3.
Keeping the belt centered on the azimuth pot sprocket, raise or lower the sprocket on the azimuth motor to center the belt on the motor sprocket. Keep the sprocket clear of the top of the motor. Use Locktite 242.
4.
Finally, raise or lower the drive sprocket at the center of the yoke to center the belt on the drive sprocket. Use Locktite 242 on the cap screw when finished.
5.
See Figure 4 for all three sprockets with the belt centered on each.
6.
Slowly rotate the azimuth yoke 540 degrees (from one stop to the other) 10 times. See if the drive belt rides up or down and touches the motor sprocket rim. If it does, the motor bracket is not level and must be tilted to correct the belt moving up or down. Loosen and level the screws on one side of the bracket at a time. Check the belt tension after leveling. Make sure the screws are tight when done.
7.
Turn on power to the antenna.
8.
Check azimuth alignment (see Section 8.2.20, page 194).
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clearance >0.5mm (0.02") required here between top of motor and sprocket
h h
belt centered on sprocket
drive sprocket cap screw f
azimuth pot sprocket d
motor sprocket set screw e
space
Figure 14-1.
Figure 4. Azimuth Drive Belt Adjustment (Yoke at 360° Azimuth) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 217
Repair Procedures
8.2.30. Antenna Control Unit (ACU)/(TAC-92) Tools: #2 Phillips screwdriver 3 mm (1/8”) flat blade screwdriver
Part Location: The ACU/TAC-92 is located indoors next to the computer. The fan-out connects the antenna cable to the ACU/TAC-92. TAC-92 [12573002]: See drawings 112909 on page 211, 112228 on page 213, 112226 on page 215, and 112572 on page 223. ACU [12573104]: See drawings 111419-0 on page 237, 110759 on page 241, and 110758-B on page 235.
Procedure: 1.
TAC-92 only—Record the current setting in the TAC-92, if not already recorded {8.2.36, page 228}.
2.
Turn off power to the TeraScan system. Refer to the TeraScan Startup/Shutdown Manual that came with your system for instructions.
3.
Unplug the power cord to the ACU/TAC-92.
4.
Detach the computer control cable (N) form the ACU/TAC-92.
5.
Detach the cable(s) (I-ACU) (I1, I2 - TAC-92) from the fan-out.
6.
Optional: detach the ship gyro input wiring.
7.
Remove the four screws holding the ACU/TAC-92 to its case and slide out the ACU/TAC-92.
8.
Slide in the new ACU/TAC-92 and secure the front of the unit to its case.
9.
Optional: reattach the gyro repeater wires to the ACU/TAC-92.
10. Reattach the cable(s) from the fan-out. 11. Reattach the computer control cable(N). 12. Plug the power cord into the ACU/TAC-92. 13. Turn on power to the system. 14. TAC-92 only—Re-enter the previously reorded settings fro the TAC-92. 15. ACU only—Align the antenna cable {8.2.23., page 207}. 16. ACU only—Align the elevation pot {8.2.21., page 199}. 17. ACU only—Align the azimuth pot {8.2.20., page 194}.
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8.2.31. Fan-Out for TAC-92 [12573095]/ for ACU [12573105] 8.2.31.1. TAC-92 Fan-Out [12573095] Tools: 3 mm (1/8”) flat blade screwdriver #2 Phillips screwdriver
Part Location: The Fan-Out connects to the antenna cable (A) and the TAC-92/ACU.
Procedure: 1.
Turn off power to the TeraScan system. Refer to the TeraScan Startup and Shutdown Manual that came with your system for instructions.
2.
Detach the cables (ACU:I) (TAC-92: I1, I2) from the ACU.
3.
Detach the clamp holding the black antenna cable onto the Fan Out.
4.
Loosen the screw contacts for the antenna control wires and remove the wires.
5.
Attach the black antenna control cable to the replacement Fan Out via the cable clamp.
6.
Attach the antenna control wires to the Fan Out. The number of the Fan Out screw terminal block matches the number on the wire. See drawing 800-07127 on page 67.
7.
Reattach the cables to the TAC-92/ACU.
8.
Turn on power to the system.
9.
Align the antenna cable {8.2.23., page 207}.
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Repair Procedures
Page 220 SeaSpace Corporation
Repair Procedures
TAC-92 - Fan Out Schematic (112654-B)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
8.2.32. Motor Board Replacement - TAC-92 [12573010] This procedure replaces the motor control board of the Antenna Control Unit (ACU), Model TAC-92.
Tools: #2 Phillips screwdriver 5/16 nut driver 150 mm (6”) crescent wrench Grounding wrist strap
Part Location: The motor control board is at the left rear of the ACU. See drawing 112572 Item 13, shown on page 223.
Procedure: 1.
Turn off power to the ACU. Remove the four screws holding the ACU to the front of the case.
2.
Remove all cables from the rear of the ACU.
3.
Remove the four screws that hold the top cover on the ACU. Remove the cover.
4.
Remove the power connectors at J4, J5, and J8.
5.
Remove the hardware on J1, J2, and J3 that hold the board on the rear of the case.
6.
Remove the two ground lugs.
7.
Remove the three nuts that hold the board to the bottom of the ACU. Attach the ground strap to the case. Remove the board.
8.
Insert the new motor control board in the case and tighten the nuts holding the board to the case.
9.
Attach the ground lug. Remove the grounding strap.
10. Attach the hardware on J1, J2, and J3, at the rear of the case. 11. Attach the power connectors, J4, J5, and J8. 12. Attach the top cover with four screws. 13. Reattach all cables at the rear of the ACU. 14. Attach the ACU to the case with four screws on the front panel. 15. Turn on power to the ACU. 16. Calibrate the antenna cable {8.2.23., page 207}. 17. Align the elevation pot {8.2.21., page 199}. 18. Align the azimuth pot {8.2.20., page 194}.
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Repair Procedures
TAC-92 General Assembly (112572)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 223
Repair Procedures
8.2.33. Bridge Rectifier - TAC-92 [12573030] This procedure replaces the bridge rectifier of the Antenna Control Unit (ACU), model TAC-92.
Tools: #2 Phillips screwdriver 5/16 nut driver
Part Location: The bridge rectifier is at the right middle of the ACU. See drawing 112572, item 15, on page 223.
Procedure: 1.
Turn off power to the ACU. Remove four screws holding the ACU to the front of the case.
2.
Remove all cables from the rear of the ACU.
3.
Remove the four screws that hold the top cover on the ACU. Remove the top cover.
4.
Remove the four wires from the bridge rectifier. Note the colors.
5.
Remove the hardware on the bridge rectifiers that hold it to the case.
6.
Remove the bridge rectifier.
7.
Insert the new bridge rectifier in the case and tighten the nuts holding it to the case.
8.
Attach wires in the same order.
9.
Attach the top cover with four screws.
10. Reattach all cables at the rear of the ACU. 11. Attach the ACU to the case with four screws on the front panel. 12. Turn on power to the ACU.
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8.2.34. Power Module Replacement - TAC-92 [12573015] This procedure replaces the power module of the Antenna Control Unit (ACU), model TAC-92.
Tools: #2 Phillips screwdriver 5/16 nut driver
Part Location: The power module is at the right rear of the ACU. See drawing 112572, item 24, on page 223.
Procedure: 1.
Turn off power to the ACU. Remove the four screws holding the ACU to the front of the case.
2.
Remove all cables from the rear of the ACU.
3.
Remove the four screws holding the top cover on the ACU. Remove the cover.
4.
Remove the power wires from the screw terminal and note their order.
5.
Remove the hardware on the power module that hold it to the rear of the case.
6.
Remove the power module.
7.
Insert the new power module in the case and tighten the nuts holding it to the case.
8.
Attach the wires to the terminal strip.
9.
Attach the top cover with four screws.
10. Attach all cables at the rear of the ACU. 11. Attach the ACU to the case with four screws on the front panel. 12. Turn on power to the ACU.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
8.2.35. PROM Replacement on the TAC-92 [12573090] Tools: 3 mm (1/8”) flat blade screwdriver #1 Phillips screwdriver #2 Phillips screwdriver PROM remover 24-40 pin PROM inserter 24-28 pin Wrist grounding strap
Part Location: The PROM is located on the motor control board. See drawing 112228 on page 213.
Procedure: 1.
Turn off power to the TAC-92.
2.
Unplug all cables from the TAC-92.
3.
Remove the four screws holding the TAC-92 to the front of the rack.
4.
Slide the TAC-92 out the front of the rack.
5.
Remove the screws holding the top cover (two screws on each side). Remove the cover.
6.
Locate the ACU PCB assembly (item 13 of drawing 112572 on page 223).
7.
Locate the PROM on the board (item U15 of drawing 112228 on page 213). Note the orientation of the PROM on the board. The center notch (pin 1) points towards the rear connectors of the TAC-92.
8.
Place the PROM remover on the PROM and extract it.
9.
Place the new PROM in the PROM inserter. Check to see that none of the pins are bent.
10. Carefully insert the PROM on the board (the pin 1 notch should point towards the rear connectors). 11. Press down on the inserter to seat the PROM. Verify that none of the pins are bent under the PROM. 12. Replace the cover and attach the four screws. 13. Slide the TAC-92 back into the rack. 14. Plug in all cables to the TAC-92. 15. Turn on power to the TAC-92. 16. Program the TAC-92 to set the gyro type.
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Note:
Gyro type 0 = no gyro. The error light is off if no gyro wiring is attached.
a. Press RESET on the TAC-92. b. Press MODE until “AZ xxxx EL nnnn” appears. c.
Press 7 9 7 9 ENTER on the TAC-92 keypad.
d. Press the MODE button until GYRO TYPE appears. e.
Enter the gyro type number on the TAC-92 keypad. See section 7.2.6.1 on page 117.
f.
Press ENTER until the message “SAVE NEW PARAMETERS” appears on the display. Press the UP arrow. Press ENTER until the SEA TEL logo appears.
g. Press RESET on the TAC-92.
Note:
Antenna cable calibration does not have to be redone when the PROM is changed.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
8.2.36. Record the Current Settings of the TAC-92 This procedure explains how to retrieve certain settings in the TAC-92 that should be written down and kept for future reference, in case circumstances should arise in which these settings need to be re-entered.
Procedure: 1.
Press the RESET button on the TAC-92 front panel.
2.
Press the MODE button until AZxxxx ELnnnn appears on the display.
3.
Press 7 9 7 9 ENTER.
4.
Each time ENTER is pressed, a new setting (name and value) will be displayed.
5.
Record each reading (write it down for future reference) and press ENTER to continue on to the next setting.
6.
When done, press RESET.
Setting AUTOCAL
Reading None
Purpose No reading. Command used to calibrate the antenna cable. Press up arrow (), then press ENTER to start the Auto Calibration process. Used to adjust ELSCALE and AZSCALE parameters to compensate for IR losses in the control cable.
ELSCALE
Elevation scale factor. Adjusts span of elevation readings to match physical antenna motion. Smaller numbers give larger reading changes. Set automatically by AUTO CAL
ELTRIM
Elevation trim offset. Adjusts final display to correct for minor pointing errors in the antenna system. Increase number to increase display. Each count is 1/6 degree, see 8.2.21, page 199, to adjust this value.
AZSCALE
Azimuth scale factor. Adjusts span of azimuth readings to match physical antenna motion. Smaller numbers give larger reading changes. Set automatically by AUTO CAL
AZTRIM
Azimuth trim offset. Offsets true azimuth display to compensate for alignment errors of the pedestal relative to the bow of the ship. Does not affect REL azimuth reading. Increase number to increas display. Each count is 1/6 degree. DO NOT USE THIS COMMAND. Instead, use the TeraScan align or autoalign command to correct position.
STEP SIZE
Not used.
STEP DELAY
Not used.
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Repair Procedures
Setting
Reading
Purpose
STEP INTEGRAL
Not used.
AUTO THRS
Not used.
SEARCH INC
Not used.
SEARCH LIMIT
Not used.
SEARCH DELAY
Not used.
SYSTEM TYPE
GYRO TYPE
9
System options 1 = Reverse elevation motor direction 8 = Enable RS-232. For shipboard use. Sets analog gyro type: 0 = No gyro (PROM 1.61 or greater) 0 = Step-by-step (PROM 1.60 or less) 1 = 1:1 Synchro 2 = Step-by-step (PROM 1.61 or greater) 36 = 36:1 Synchro 360 = 360:1 Synchro
POLANG TYPE
Not used.
POL 1
Not used.
POL 2
Not used.
POL 3
Not used.
POL 4
Not used.
POL 5
Not used.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
8.2.37. Enter Settings in the TAC-92 This procedure enters the antenna settings back into the TAC-92. The settings were recorded by the steps in Section 8.2.36.
Procedure: 1.
Press the RESET button on the TAC-92 front panel.
2.
Press the MODE button until AZxxxx ELnnnn appears on the display.
3.
Press 7 9 7 9 ENTER.
4.
See the table in Section 8.2.36. For each setting displayed, enter the numeric value on the TAC-92 keypad and press ENTER.
5.
Enter values until the message "SAVE NEW PARAMETERS" appears on the disploy.
6.
Press the UP arrow button ( ).
7.
Press ENTER until the SEATEL logo appears.
8.
Press RESET.
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Repair Procedures
8.2.40. Logic Board - ACU [12573104] This procedure replaces the logic board of the Antenna Control Unit (ACU)
Tools: #2 Phillips screwdriver 6 mm (1/4") flat blade screwdriver PROM remover PROM Inserter Grounding Wrist Strap
Part Location: The logic board is the lower board in the card cage at the back of the ACU. The PROM U6 is the socketed chip in the middle of the logic board (item 25 of drawing 110759-A on page 241).
Procedure: 1.
Turn off power to the ACU.
2.
Remove the four screws that hold the front ears of the ACU onto the chassis.
3.
Slide the ACU forward and remove it from the chassis.
4.
Disconnect all cables connected to the ACU.
5.
Facing the rear of the ACU, remove the four screws that hold the sheet metal plate at the rear of the ACU. Remove this plate.
6.
Two printed circuit cards should now be exposed in the card cage. Remove the logic board (lower board).
7.
On the logic board is a smaller daughter board (item 38 of drawing 110759-A, page 241) that is the RS232 adapter assembly.
8.
Remove the daughter board and place it on the replacement logic board as U18.
9.
Remove PROM U6 from the old logic board and insert it on the new board if the PROM numbers are different.
10. Insert the logic board back in the ACU, making sure it seats firmly. 11. Replace the rear sheet metal panel at the back of the ACU. 12. Reconnect all cables on the ACU. 13. Slide the ACU back in the receiver chassis. 14. Replace the four screws that hold the front ears onto the receiver chassis. 15. Turn on power to the ACU. 16. Perform the tests in sections 5.1.1. on page 95, and 5.1.2. on page 97.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
8.2.41. RS232 Daughter Board - ACU [12573104] This procedure replaces the RS232 daughter board mounted on the logic board.
Tools: #2 Phillips screwdriver 6 mm (1/4") flat blade screwdriver Grounding Wrist Strap
Part Location: The logic board is the lower board in the card cage at the back of the ACU. See drawing 110759-A, on page 241.
Procedure: 1.
Turn off power to the ACU.
2.
Remove the four screws that hold the front ears of the ACU onto the chassis.
3.
Slide the ACU forward and remove it from the chassis.
4.
Disconnect all cables connected to the ACU.
5.
Facing the rear of the ACU, remove the four screws that hold the sheet metal plate at the rear of the ACU. Remove this plate.
6.
Two printed circuit cards should now be exposed in the card cage. Remove the logic board (lower board).
7.
On the logic board is a smaller daughter board (item 38 of drawing 110759-A, on page 241) that is the RS232 adapter assembly.
8.
Remove the old daughter board.
9.
Insert the replacement RS232 daughter board on the logic board.
10. Insert the logic board back in the ACU, making sure it seats firmly. 11. Replace the rear sheet metal panel at the back of the ACU. 12. Reconnect all cables on the ACU. 13. Slide the ACU back in the receiver chassis. 14. Replace the 4 screws that hold the front ears onto the receiver chassis. 15. Turn on power to the ACU. 16. Perform the tests in sections 5.1.1. on page 95 and 5.1.2. on page 97.
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8.2.42. Motor Board - ACU [12573104] This procedure replaces the motor board of the Antenna Control Unit (ACU).
Tools: #2 Phillips screwdriver 6 mm (1/4") flat blade screwdriver
Part Location: The motor board is the upper board in the card cage at the back of the ACU. See drawing 111419-0 on page 237.
Procedure: 1.
Turn off power to the receiver chassis and remove the cord.
2.
Remove the four screws that hold the front ears of the ACU onto the chassis.
3.
Slide the ACU forward and remove it from the chassis.
4.
Disconnect all cables connected to the ACU.
5.
Facing the rear of the ACU, remove the four screws that hold the sheet metal plate at the rear of the ACU. Remove this plate.
6.
Two printed circuit cards should now be exposed in the card cage. Remove the motor board (upper board).
7.
Insert the replacement motor board back in the ACU, making sure it seats firmly.
8.
Replace the rear sheet metal panel at the back of the ACU.
9.
Reconnect all cables on the ACU.
10. Slide the ACU back in the receiver chassis. 11. Replace the four screws that hold the front ears onto the receiver chassis. 12. Turn on power to the ACU. 13. Perform the Antenna Cable Calibration Procedure. See section 8.2.23. 14. Perform the tests in section 5.1.1. on page 95 and section 5.1.2. on page 97.
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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Repair Procedures
Antenna Control Unit (ACU) Assembly. Chassis Wiring Diagram 4884L (110758-B)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 235
Repair Procedures
Page 236 SeaSpace Corporation
Repair Procedures
Motor Driver Board Assembly (111419-0)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 237
Repair Procedures
Page 238 SeaSpace Corporation
Repair Procedures
ACU Motor Driver Board Schematic (110942-B)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 239
Repair Procedures
Page 240 SeaSpace Corporation
Repair Procedures
Logic Board Assembly (110759-A)
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 241
Repair Procedures
Page 242 SeaSpace Corporation
9 Configurations 9.2. Major Components Antenna 12549001
1.2 m antenna, 1.2 m (48”), radome, [12763021] L-band feed, [12573001] gyro, 0-90° elevation. Gain @ 1700 MHz: 24.0dB (55% efficient)
12549005
1.2 m antenna, radome, [12736021] L-band feed, no gyro, 0-90° elevation, TAC-92.
12549007
1.2 m antenna, radome, no feed, no gyro, 0-90° elevation, TAC-92.
12549105
1.2 m antenna, radome, feed [12763021], no gyro, 0-180° elevation, TAC-92.
12549107
1.2 m antenna, radome, no feed, no gyro, 0-180° elevation, TAC-92.
12551001
1.0 m antenna, 1.0 m (39”), radome, [12763021] L-band feed, [12573001] gyro, 0-90° elevation, TAC-92.
12551003
1.0 m antenna, [12763021] no gyro, 0-90° elevation, TAC-92.
12551005
1.0 m antenna, radome, no feed, no gyro, 0-90° elevation, TAC-92.
12825001
1.5 m antenna, land only, 0-180° elevation, TAC-92. No Feed. With radome.
70268001
1.5 m antenna [12825001], L-band integrated feed [12218002], power injector [12791001].
70268011
1.5m antenna [12825001] L&S-band Feed/LNA/DC [12218001], power injector [12791001]
12580002
3.0m antenna, radome with 8 cm (18") high base frame
12667004
Integrated feed/LNA/downconverter, HRPT (L-band)
12791001
Power injector 12VDC output
12791003
Power injector 15VDC output
Feeds
12763021
Feed, HRPT
12763022
Feed, HRPT & DMSP
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 243
Configurations
12763024
Feed, HRPT & WEFAX
12799001
Feed, SCD (2 LNAs)
12218001
Integrated feeds/LNAs/DCs, HRPT & DMSP
12218002
Integrated feed/LNA/DC, HRPT. Replaces [12667004]
Downconverter 70151001
HD100: HRPT (L-band) in rose enclosure
70151002
HD100: HRPT (L-band) and DMSP (S-band), in rose enclosure
70151005
HD100: HRPT (L-band) and WEFAX (L-band), in rose enclosure
70151008
HD100: SCD (S-band), in rose enclosure
Gyro / Clamp 12573001
Gyro frame (2 wheels) (shipboard)
70044001
Webb clamp (fixed/permanent site) (complete kit with hardware [70121001])
Antenna Controller Unit (ACU)/TAC-92 12573002
TAC-92 (blue display digits)
12573104
ACU (red display digits)
Fan-Outs 12573002
for TAC-92
12573105
for ACU
Gyro Interface Board Synchro (Mounts in TAC-92/ACU) 12573063 12573064 12573064
− 50, 60, 400 Hz 36:1 − 50, 60, 400 Hz 1:1 − 50, 60, 400 Hz
360:1
Heater 1.2 m/1.5 m Antenna 70407001
120 VAC heater coil (two used per antenna)
70048001
120 VAC thermostat assembly
70407002
220 VAC heater coil (two used per antenna)
70048002
220 VAC thermostat assembly
Heater 1.0 m Antenna 70046001
120 VAC heater assembly (two used per antenna)
70047001
120 VAC thermostat assembly (two thermostats)
70046002
220 VAC heater assembly (two used per antenna)
70047002
220 VAC thermostat assembly (two thermostats)
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Configurations
Control Cable 11748002
RS232 antenna controller cable
70025xxx
Antenna control cable (control, power, RF signal)
Pedestal 60016001
Non-penetrating roof pedestal, 1.2m/1.5m antenna
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 245
Configurations
Page 246 SeaSpace Corporation
Configurations
Webb Clamp (70044) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 247
Configurations
Page 248 SeaSpace Corporation
Configurations
1.2 m Antenna Heater Coil 70407 Rev B (Sheet 1 of 3) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 249
Configurations
Page 250 SeaSpace Corporation
Configurations
1.2 m Antenna Heater Coil 70407 Rev B (Sheet 2 of 3) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 251
Configurations
Page 252 SeaSpace Corporation
Configurations
1.2 m Antenna Heater Coil 70407 Rev B (Sheet 3 of 3) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page 253
Configurations
Page 254 SeaSpace Corporation
Configurations
1.2 m Antenna Thermostat Assembly 70048 (Sheet 1 of 3) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
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Configurations
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1.2 m Antenna Thermostat Assembly 70048 (Sheet 2 of 3) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.2 m Antenna Thermostat Assembly 70048 (Sheet 3 of 3) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.0 m Antenna Heater Assembly 70046 (Sheet 1 of 2) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.0 m Antenna Heater Assembly 70046 (Sheet 2 of 2) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 1 of 5) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 2 of 5) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 3 of 5) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 4 of 5) TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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1.0 m Antenna Thermostat Assembly 70047 Rev C (Sheet 5 of 5)
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10 Appendices 10.1. Glossary ACU: DC: DMM: DMSP: GMT: GPS: HRPT:
LNA: LSD: MS: MSD: NF: NMEA: PCB: RTD: TAC-92: VAC: VDC: WEFAX:
Antenna Control Unit Downconverter Digital Multi-Meter Defense Meteorological Satellite Program Greenwich Mean Time - Local solar mean time at Greenwich meridian Global Positioning System High Resolution Picture Transmission (Telemetry Stream, NOAA TIROS Satellite) Low Noise Amplifier Least Significant Digit Military Specifications Most Significant Digit Noise Figure National Marine Electronics Association Printed Circuit Board Real Time Data (Telemetry Stream, DMSP Satellite) Tracking Antenna Controller, model 92 Volts Alternating Current Volts Direct Current Weather Facsimile
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10.1.1. Environment Variables/System Configuration $PASSDIR
TeraScan environment variable that defines the pass directory.
last_location
File in the pass directory that contains the system location.
magnetic_mode
File in the directory ($REFDATA/geomag) that provides magnetic declination corrections anywhere in the world.
SHMEM_NMEA
File in the pass directory that allocates the NMEA message shared memory.
[TeraScan 2.6 only]: $PASSRSVP
TeraScan environment variable that defines the antenna directory on the system. Usually it is defined as $PASSDIR/antenna.
$TKPORTxy
TeraScan environment variable that defines the serial port that attaches antenna xy to the system (x= frame synchronizer, y= antenna unit or dish). The environment variable are usually:
tkconfig0
TKPORT00 (L-band antenna) TKPORT01 (S-band antenna) Antenna configuration file for frame synchronizer 0. Located in directory $PASSRSVP. See section 10.2.11. on page 295.
$NAVDIR
Locking file associated with the GPS unit on the system. File is located in the pass directory. If $TKCKTP=10, NAVDIR is set to the NMEA unit (0 or 1) that is the source of location data.
ant_lockxy
File in the pass directory $PASSDIR that locks antenna xy. x = frame synchronizer y = antenna unit or dish (usually ant_lock00 and ant_lock01)
$COMPASS_TYPE0
TeraScan environment variable that defines the source of ship heading data =002 =003 =004 =1001 =200x
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Step-By-Step Gyro 360:1 Synchro Gyro 1:1 or 36:1 Synchro Gyro Fluxgate (Magnetic) Compass NMEA message (x defines the baud rate) =2001: 2400 baud =2002: 4800 baud =2003: 9600 baud =2004: 19200 baud =2005: 38400 baud =4000 in Fixed Site. No heading needed.
Appendices
NMEA_MSG_FMT0
Message Format for data sent to nmea_monitor: =1 NMEA 0183 version 2.10 format =2 NAV1 message format, miniCIN Mod 3 (if not defined, NMEA 2.10 is assumed)
tscan.login
File in the pass directory ($PASSDIR) that defines the environment variables shown above.
$TKCKTP
TeraScan environment variable that defines the type of clock attached to the system. =5 GPS receiver, not part of the antenna =6 GPS receiver, integrated into the antenna =10 Location & Time read from NMEA shared memory
$TKCLOCK
TeraScan environment variable that defines the serial port that is attached to the GPS unit. If $TKCKTP=6, $TKCLOCK must be the same as $TKPORT00 or $TKPORT01.
[TeraScan 3.0 only]: The environment variables are replaced by the system configuration file $PASSDIR/system.config. See section 1.5 on page 3 for comparison.
Files: $PASSDIR/system.config $PASSDIR/antenna/antenna.calib $REFDATA/config/antenna.config
System configuration file Antenna dynamic data Antenna static data
The following values are defined for nmea compass types; either a number or description can be defined in $PASSDIR/system.config. The name is preferred. nav.type # or 1 2 3 4 1001 2001 2002 2003 2004 2005 4000
name gyro gyro sbs gyro 360 1 gyro 1 1 flux 1893 nmea + nav.baudrate: 2400 nmea + nav.baudrate: 4800 nmea + nav.baudrate: 9600 nmea + nav.baudrate: 19200 nmea + nav.baudrate: 38400 fixed
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The setting values are changed from numbers to descriptions. $TKCKTP new description
old value
gps.index: external-acutime
5
gps.index: internal-SV6
6
gps.index: nmea
10 $NAVDIR
gps.data.source:1
0
gps.data.source:2
1
(gps.data.source is only used by gps.index:nmea.)
Note:The hardware lockfile is defined from the device name. system.config device name
lockfile name
Antenna
antenna.device
$PASSDIR/ant_lock_DEVICE
GPS
gps.device
gps.index:external-acutime; $PASSDIR/gps_lock_DEVICE
hardware
gps.index:internal-SV6: $PSASSDIR/ant_lock_DEVICE
10.1.2. PROM Version History TAC - 92 Antenna Controller 1.60
Changed elevation range from [0-90] to [0-180]°. Elevation pot rotated 90°. 90° Elevation reads 2.5 volts.
1.61
Changed gyro types in TAC-92 Old Value
1.61 Value
0 = Step by step gyro
0 = no gyro 2 = Step by step gyro
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10.2. Antenna-Related TeraScan Software Summary The following commands are used in the operation and diagnosis of the tracking antennas. For complete details and warnings about running these commands, refer to thelp [TeraScan 3.0] or the man function [TeraScan 2.6]. These commands must be run from an xterm window (command tool or shell tool).
Example [TeraScan 2.6]: %man ac
Example [TeraScan 3.0]: %thelp ac
10.2.1. ac Antenna controller diagnostic command.
Format: ac unit command {! repeat_count}{#*}
Description: ac sends diagnostic commands to the antenna controller for a polar satellite and displays the reply, if any. The type of command sent to the antenna controller depends on the controller type. The function does not check the format or correctness of the command sent. Invalid commands may produce undefined results. The command can optionally be repeated by using the ! repeat_count value. The antenna controller is reset to a known state before sending the command, unless the # symbol is the last argument on the command line. If the * symbol is specified, the commands are sent to the antenna without first locking the antenna file. The # and * must not be separated by spaces. The reply from the controller depends on the command and the controller type. If the command “?” is issued, the ac function will list the available commands and status bit values available for this antenna.
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Examples: [1]%ac 1 E900 [2]%ac 1 A3600 [3]%ac 1 S ! 400 Reply: Sp@ 70 40
{run one time, change elevation to 90.0°} {run one time, change azimuth to 360.0°} {read the antenna status 400 times}
... Reply: Sp@ 70 40 Reply: Sp@ 70 40 word1=0x70 word2=0x40 Reply: Sp@ 70 40 [4]%ac 1 P Reply: E898A2534
{read elevation and absolute/magnetic azimuth} {elevation 89.8°, azimuth 253.4°}
[5]%ac 1 H Reply: R4500H0020
{read dish relative azimuth and ship heading} {dish relative 450.0°, ship heading 2.0° gyro compass only}
[6]%ac 1 O4 [7]%ac 1 O5 [8]%ac 1 OX [9]%ac 1 E200 # [10]%ac 1 P ! 20 # [11]%ac 1 "?" [12]%ac 1 NMEA ! 20 [13]%ac ?
{Selects command state OPEN} {Selects command state SHORTED} {X=0,1,2,3...7 binary value} {do not reset controller before issuing E command} {do not reset controller before issuing P commands} {list command set for this antenna} {read NMEA ship heading and location data 20 times} {start ac in interactive mode} {list telemetry chains with antennas} {exit}
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10.2.2. align Manually align the tracking antenna based on the maximum signal strength received while tracking a satellite.
Format: align align unit
Description: align is used to manually align a polar satellite tracking antenna. The user must view the signal strength obtained from the system's receiver while tracking a satellite. The user must enter azimuth adjustments (positive or negative) and observe the effect they have on the signal strength from the trackeye display. The objective is to find an azimuth adjustment that gives a maximum signal strength for the pass. This azimuth adjustment may then be stored in the file [TeraScan 3.0:] $PASSDIR/antenna/antenna.calib [TeraScan 2.6]: $PASSRSVP/tkconfig0 to be used in tracking following passes. This command can also be used during the sunalign command to adjust the antenna’s orientation.
Example: [TeraScan 2.6]: Unit = acc*10+antenna unit [TeraScan 3.0]: Unit = Telemetry chain number [1]% align Enter adjustment +/- xx.x Or [=-0.1]=+0.1 Type exit to stop. [TeraScan 2.6]: Do you wish to save the correction in tkconfig0[yes/no]? {Reply: yes or no} [TeraScan 3.0]: Do you wish to save the correction in antenna.calib [yes/no]? {Reply: yes or no} TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
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10.2.3. alignnorth alignnorth - positions the specified antenna to align it using a compass.
Format: alignnorth unit {magnetic/true}
Description: alignnorth positions the specified antenna so that the edge of the antenna dish is pointing in a true north-south line or magnetic north-south line. This command can be issued prior to checking the antenna’s alignment. After the antenna is positioned, the user must check the alignment with a compass. Any correction to the antenna’s position that has been made using the align or autoalign command will be subtracted from 90.0° azimuth (pointing east). The correction for magnetic declination will then be added based on the parameters of the command.
Parameters: unit [TeraScan 3.0]: This is the telemetry chain whose antenna is to be aligned [TeraScan 2.6]: This is the antenna controller (acc)*10 + antenna unit (i.e. dish) to position. The antenna units are numbered 0,1,2. This parameter is optional. If no unit is supplied, acc 0, antenna unit 0 is positioned. magnetic Specifies that the antenna dish will be positioned pointing to Magnetic north. This is the easiest position for aligning the antenna when the compass does not have a magnetic declination correction. true Specifies that the antenna dish will be positioned pointing to True north. This is the default state if no alignment type is supplied.
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Examples: [TeraScan 3.0]: [1]%alignnorth 3 true Positions the antenna associated with chain 3 to point to 90° azimuth, 0° elevation, true north. [TeraScan 2.6]: [1]%alignnorth Positions acc 0, antenna unit 0 to point to 90° azimuth, 0° elevation, true north. [2]%alignnorth 1 magnetic Positions acc 0, antenna unit 1 to point to 90° azimuth with magnetic correction, 0° elevation (magnetic north).
Notes:
This command is not used in conjunction with any other function. It positions the antenna only. It cannot be used while the antenna is tracking a satellite or running any other command that controls the antenna. This command is used by polar satellite tracking antennas only. Older versions of this command did not have the magnetic option - all positions were with respect true north.
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Appendices
10.2.4. antenna Antenna tracking diagnostic command.
Format: antenna unit pass_number satellite telemetry start_date start_time duration {now align}
Description: antenna is a higher level diagnostic command that tests the following components of the antenna subsystem: orbital elements still valid, earth location calculations, site location, antenna configuration files, antenna controller, antenna controller communications, antenna motors, and antenna position pots. The commands are sent to the antenna in a real time sequence. The sequence can be run when the specified starting date and time is reached or can be run “now”. The function trackeye is used to monitor the progress of the antenna. This command does not store any data on the pass disk - see rdframe. Normally TeraCapCon and xcapcon are used to determine the date and time to begin tracking one of the satellites. To retrack a pass recently received, use lspass(1) to display the starting date, time, and duration.
Example: [TeraScan 3.0]: %antenna 4 2 noaa-14 hrpt 1998/7/17 12:02:0 12:0 now [TeraScan 2.6]: %antenna 0 1 noaa-11 hrpt 92/1/31 11:22:30 8:30 now Note:
This command cannot be used a second time while this program is already tracking a satellite with the same antenna unit.
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10.2.5. autoalign Align the tracking antenna based on the maximum signal strength received while tracking a satellite.
Format: autoalign autoalign unit fine
Description: autoalign is used to align a polar satellite tracking antenna. The function uses the signal strength obtained from the system’s receiver while tracking a satellite in conjunction with the antenna’s test azimuth alignment to find an azimuth adjustment that gives a maximum signal strength from the pass. This azimuth adjustment is then stored in the file [TeraScan 3.0]: $PASSDIR/ antenna/antenna.calib [TeraScan 2.6]: $PASSRSVP/tkconfig0 to be used in tracking following passes. The program begins with an azimuth adjustment of -180.0°, and steps through a series of angles to +180.0°, searching for a maximum signal. As the antenna alignment procedure converges on a solution, the monitoring program trackeye full displays the alignment value in the align and the lock indicator is shown in the frame sync status field. The signal strength is also shown. When the autoalign program is finished, the pass continues to be tracked by antenna using the azimuth adjustment field.
Examples: [TeraScan 3.0]: Perform initial autoalignment on the antenna associated with chain 4. [1]%autoalign 4 Perform a fine adjustment on the existing alignment to the antenna associated with chain 2. [2]%autoalign 2 fine [TeraScan 2.6]: Perform initial autoalignment: [1]%autoalign 0 (L-band antenna) [2]%autoalign 1 (S-band antenna) Run autoalign to perform a fine adjustment on the existing alignment: [3]%autoalign 0 fine (L-band antenna)
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Appendices
10.2.6. nmea_monitor nmea_monitor monitors the NMEA data messages sent by external equipment and stores the messages in shared memory.
Format: nmea_monitor unit delay
Description: nmea_monitor reads the a) NMEA 0183 messages V2.10, or b) NAV1 messages, decodes them, and stores them in shared memory. Programs such as antenna(8) and whereami(8) will use the data to provide a ship heading, land location if the system is so configured. NMEA 0183 messages contain current position information (such as latitude, longitude, altitude, heading, roll, pitch, and speed over ground), and information about the next waypoint of a route (waypoint number latitude, longitude, distance, bearing). Not all NMEA devices transmit all types of data. NAV1 100 ms messages contain heading, latitude, longitude, and time. The system can be configured to use an analog gyro input (step-by-step, 360:1, or 1:1) for ship heading AND the NMEA messages for display purposes. The system can also be configured to read the NMEA messages to provide ship heading AND for display purposes. The super user runs this program that is started by $PASSDIR/tscan.rc.local. All other users access shared memory to use the data. One or two serial ports can be configured for reading NMEA messages. The ports are numbered 1 and 2 in TeraScan 3.0 and 0 and 1 in TeraScan 2.6. Port [nav-1]/0 always defines the port that supplies ship heading. If the NMEA data is to be used for ship heading, port [nav-1]/0 must supply this data. The following environment variables must be defined in order to run nmea_monitor using port [nav-1]/0: “[nav-1]nav.type”/ COMPASS_TYPE0
Type of device associated with the first port (NMEA, fluxgate, or analog) (See section 10.1.1. on page 276.)
“[nav-1]nav.device”/ HEADPORT0
Device name of the serial port attached to the first nmea port. For example: “/dev/term/1”.
“[nav-1]nav.msgfmt” /NMEA_MSG_FMT0
Message format for data sent to nmea_monitor 0183 v2.01/1=NMEA 0183 Version 2.01 nav1-cdg/2=NAV1 -CDG
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If the second port (1) is used, the following variables must also be defined: “[nav-2]nav.type”/ COMPASS_TYPE1
Type of device associated with the second port (See section 10.1.1. on page 276.)
“[nav-2]nav.device”/ HEADPORT1
Device name of the serial port attached to the second nmea port. Example: “/dev/term/3”.
“[nav-2]nav.msgfmt” /NMEA_MSG_FMT1
(same values as the first port) Message format for data sent to nmea_monitor 0183 v2.01/1=NMEA 0183 Version 2.01 nav1-cdg/2=NAV1 -CDG
In general, it is best to run the port at the fastest NMEA baud rate possible.
Configuration Example 1: port [nav-1]/0 is for NMEA data, sent at 4800 baud, serial port is /dev/term/1 [TeraScan 2.6]: setenv COMPASS_TYPE0 2002 setenv HEADPORT0 /dev/term/1 [TeraScan 3.0] [nav-1] nav.type:nmea nav.device:dev/term/1 nav.baudrate:4800
Configuration Example 2: port [nav-1]/0 is an analog step-by-step gyro interface. No serial port is associated with the input. [TeraScan 2.6]: setenv COMPASS_TYPE0 2 [TeraScan 3.0] [nav-1] nav.type:gyro sbs
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Configuration Example 3: port [nav-1]/0 is an analog step-by-step gyro interface No serial port is associated with the input for port 0. port 1 [nav-2] has a NMEA monitoring using serial port /dev/term/5 at 38400 baud [TeraScan 2.6]: setenv COMPASS_TYPE0 2 setenv COMPASS_TYPE1 2005 setenv HEADPORT1 /dev/term/5 [TeraScan 3.0]: [nav-1] nav.type:gyro sbs [nav-2] nav.type:nmea nav.device:/dev/term/5 nav.baudrate:38400
Example: Read the nmea messages forever. [1]%nmea_monitor >/dev/console &
Files: $PASSDIR/SHMEM_NMEA The file $PASSDIR/SHMEM_NMEA must be defined so that shared memory can be allocated to store the NMEA data. It is a zero length file with read/write permissions.
Notes: 1.
The unit (1 or 2) and delay are used for nav.msgfmt: nav1 cdg only.
1.
Do not use a NMEA message to supply ship heading unless
2.
a.
The ship heading is transmitted at least one per second, and
b.
The ship heading will remain valid even if the ship is not moving.
The antenna debug environment variable can be turned on to see the messages being received by the nmea_monitor program. To do this, make sure that no other copy of nmea_monitor is running and % setenv ANT_DEBUG 2 % nmea_monitor Also, the ac 1 NMEA command will show the current ship heading. The ac command can run even if a pass is being received.
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3.
DO NOT RUN MORE THAN ONE COPY OF nmea_monitor AT A TIME. THERE IS NO INTERLOCK TO KEEP TWO COPIES FROM TRYING TO READ THE SAME SERIAL PORT.
4.
[TeraScan 2.6]: To change from one type of ship’s heading data to another, edit the file $PASSDIR/tscan.login, change COMPASS_TYPE0, HEADPORT0, and NMEA_DATA_FMT0 and reboot the system.
5.
[TeraScan3.0]: To change from one type of ship’s heading data to another, edit the file $PASSDIR/system.config using tkconfig.
6.
If no environment variables are supplied and the nmea_monitor program is run, the default “[nav-1]nav.type:gyro”/COMPASS_TYPE0=1 (analog gyro input).
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Appendices
10.2.7. shipheading Sets the initial orientation of the antenna on board ship.
Format: shipheading unit heading shipheading unit heading retry
Description: shipheading defines the current orientation of the specified shipboard antenna that uses a Step-By-Step or synchro gyro interface. The heading value entered is the current ship heading. After this command is entered, the ship will change direction and the system will automatically correct the antenna position while tracking a pass (see trackeye parameter head). If the retry option is selected, the function will continue to retry the antenna until the ship heading can be loaded. If the antenna is not powered on, or has not completed initialization the function will wait.
Parameters: [TeraScan 3.0]: unit is the telemetry chain whose antenna is to be set. [TeraScan 2.6]: unit This is the antenna controller (acc)*10+antenna unit (i.e. dish). The antenna unit are numbered 0, 1, 2. heading This is the current ship heading, in degrees, from true north. Range: [0.0,360.0].
Examples: [TeraScan 3.0]: [1]%shipheading 1 27.5
Sets the shipheading for the antenna on chain 1 to 27.5°.
[TeraScan 2.6]: [1]%shipheading 0 27.5
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Sets the shipheading for dish 0, acc 0 to 27.5°.
Appendices
Notes: Earlier versions of the antenna tracking code required that the shipheading be set for all antenna types, including land based, fixed antennas. The command that was required for these antenna prior to sunalignment was ‘shipheading 0 0.0 retry’. Currently, the shipheading command is NOT needed for fixed antennas because the antenna is automatically configured as a GYRO/True North type antenna “[nav-1]nav.type:fixed”/(COMPASS_TYPE0=4000). If the shipheading command is issued to a Fluxgate Compass controlled antenna, the command will be ignored. THIS COMMAND WILL NOT RUN WHILE A DIFFERENT PROGRAM IS CONTROLLING THE ANTENNA. THIS FUNCTION WILL INTERFERE FOR A SHORT PERIOD WITH THE NORMAL REQUESTS ISSUED BY THE ANTENNA TRACKING PROGRAM antenna. If a GPS unit is attached to the antenna, a delay of up to 60 seconds may occur before this command can be sent to the antenna. This command should be used before any antenna alignment command (such as sunalign or autoalign). This command is not valid for an antenna that is controlled by a FLUXGATE type compass “[nav-1]nav.type:flux 1893”/(COMPASS_TYPE0=1001). This command is not valid for a land only antenna that does not have a shipheading command. This command is optional for the following antenna types: • • •
Fixed system (land based) “[nav-1]nav.type:fixed”/(COMPASS_TYPE0=4000). Portable system, land based, does not use a flux type heading to set the antenna “[nav-1]nav.type:fixed”/(COMPASS_TYPE0=4000). Shipboard system, NMEA supplied ship headings “[nav-1]nav.type:nmea”/(COMPASS_TYPE0=200x [NMEA]).
This command is REQUIRED for the following antenna type: •
Shipboard system, gyro based, Step-By-Step or synchro gyro type “[nav-1]nav.type:1,2,3, or 4”/(COMPASS_TYPE0=1,2,3, or 4.
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Appendices
10.2.8. sunalign Antenna alignment by tracking the sun.
Format: sunalign sunalign unit sunalign unit duration
Description: sunalign issues a tracking command to the antenna controller using antenna to track the sun for 6 minutes. This command is used to align the antenna so that the feed horn of the antenna will form a shadow that is centered at the center of the reflector (i.e. dish). This command should not be issued more than two times (12 minutes total) to avoid overheating the feed. The antenna unit to be aligned and the duration to track are optional parameters. This command cannot be used while the antenna is tracking a satellite.
Examples: [TeraScan 3.0]: unit = telemetry chain # [1]%sunalign Begin sun alignment of the antenna on chain 1. The antenna will track the sun for the next 06:00 minutes. [TeraScan 2.6]: unit=acc*10+antenna unit [1]%sunalign (L-band antenna) Beginning sun alignment of the antenna 0 on acc 0. The antenna will track the sun for the next 06:00 minutes. [2]%sunalign 1 (S-band antenna) Beginning sun alignment of the antenna 1 on acc 0. The antenna will track the sun for the next 06:00 minutes.
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10.2.9. sunclock Determines the correct time of day and updates the system clock.
Format: sunclock
Description: sunclock is used to read the time of day from an external source and update the system’s clock. The system always runs on GMT (zulu/UTC time). This command can be called by the root user or a TeraScan user. Only the root user can actually update the clock on the system. If a TeraScan user calls sunclock, the difference in time between real time and the system clock time can be displayed (if the environment variable ANT_DEBUG is set > 1) but the system clock will not be updated. To update the clock, the real time clock is compared with the system and an adjustment to the system clock is made. The function waits for one minute and then checks the error remaining on the system clock, which is stored in the file $PASSDIR/last_location. This command cannot be used while the antenna is tracking a satellite if the GPS unit is mounted on the antenna
Example: [1]% sunclock
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10.2.10.
tkconfig [TeraScan 2.6 Only]
Antenna tracking configuration file.
File Name: $PASSRSVP/tkconfigX
Description: The tkconfig file contains the configuration information for the antenna and receiver attached to the system. One or more frame synchronizers can be attached to the system. The frame synchronizer can only reside on the host computer. The frame synchronizers are numbered 0,1. The frame synchronizers are also referred to as acc0, acc1. The file tkconfig has the frame synchronizer number appended to it. The file tkconfig0 is associated with acc0. The file contains three sections. The first section describes the receiver and contains hardware commands to select the frequency associated with each satellite. The second section describes the antenna. The third section contains configuration constants.
To List File: [1]%cat $PASSRSVP/tkconfig0
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10.2.11. trackeye Monitors the antenna tracking and framing of pass data in real time.
Format: trackeye trackeye trackeye trackeye trackeye trackeye
{chain/accX} {antenna/360.0} li {full/cmd} fast once {chain/accX} autoalign {chain/accX} noalign chain antlead [TeraScan 3.0 Only] {chain/accX} abort {chain/accX} noabort
Description: trackeye displays the status of the data acquisition subsystem. At the start of a pass, the satellite, sensor, start date, start time, and duration are displayed. The current commanded position of the antenna, and incoming signal strength, and the receiver, bit sync, and frame synchronizer status are updated once a second (subject to the system load). For the case where the parameter full has not been selected, the following data is displayed for a pass being tracked. The antlead option is used in TeraScan 3.0 to calculate the command lead time for the antenna associated with the chain.
Display Format (normal): yyyy/mm/dd hh:mm:ss.sss azim elev head mo freq #lin S Sig fsync
Display Format (Full option): Sat:xxxx Dur:XX:XX Magnetic Declination:xx.xx
Sensor:XXXXXX Latitude:xx.xxx Ant:X
Start:XX:XX:XX Longitude: xxx.xxx Ant Azimuth:x.xxx
yyyy/mm/dd hh:mm:ss.sss azim elev head ac_azim ac_elev ca_azim ca_elev align mo freq #lin S Sig fsync BS R Trk Align
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 295
Appendices
10.2.12. whereami Determines the current antenna site location.
Format: whereami whereami list whereami once whereami once list whereami delay &
Description: whereami is used to determine the current location of the antenna. This command calls site specific code to read the location information from as outside source. The command reads the data (if it is available) and stores it is the file $PASSDIR/last_location. Other commands such as antenna or xcapcon in TeraScan then read the current site location from last_location. This command has several forms. The first form (whereami) runs forever and displays any changes only when they occur. The second form (whereami list) run forever and displays the current reading whether or not it has changed. The third form (whereami once) runs once, without retries, as a diagnostic, and will report the equipment status. The form (whereami once list) runs once and reports the location The last form runs once and delays for the period specified by delay before running again. This form does not display the current location. It updates the file last_location only. This form is used by the system in $PASSDIR/tscan.rc.local. Not all systems have site specific code. If the system has a GPS, the site location is determined by standard code. [TeraScan 2.6]: If $TKCKTP=10, the site location is read from NMEA shared memory specified by $NAVDIR ($NAVDIR = 0 or 1). [TeraScan 3.0]: If [system]gps.index=nmea, the site location is read from NMEA shared memory specified by [system]gps.data.source (=1 or 2) This command can verify the location entered by the command newsite if the system does not have any external equipment that defines the site location. This command cannot be used while the antenna is tracking a satellite if the GPS unit is part of the antenna.
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Appendices
Example: a.
Read the current location forever, waiting for a change. Heading is shown if it is valid. [1]% whereami Location:32 53.51 N 117 9.23 W Altitude:61.7 m Magnetic declination:13.287 degrees Dip:58.192 degrees ˆC
b.
{press Control+C to break}
Read the current location and display each reading. [2]% whereami list Latitude 32 53.51 N 32 53.51 N 32 53.51 N ˆC
c.
Longitude 177 9.23 W 177 9.23 W 177 9.23 W
Altitude 61.7 61.7 61.7
Declination 13.287 13.287 13.287
Dip 58.192 58.192 58.192
Declination 13.287
Dip 58.192
{press Control+C to break}
Run whereami once, reset the GPS unit. No reply. [3]% whereami once
d. Run whereami once, with reply. [4]% whereami once list Latitude 32 53.51 N
Longitude 177 9.23 W
Altitude 61.7
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G Page 297
Appendices
Page 298 SeaSpace Corporation
Index A ac command 95, 96, 97, 98, 279 accetelems file 95 ACU control cable calibration 209 control code 137 diagnostics 106-107 drive motor test 98 fan-out replacement 219 motor board replacement 233 RS232 daughter board replacement 232 adjusting elevation alignment 199 elevation drive belt 201 align command 281 alignment. See antenna alignment. alignnorth command 282 ant_lockxy file 276 antenna assembly and installation 1.0m 71-77 1.2m/1.5m 37-40 3.0m 77-81 azimuth adjustment 194 control and test commands 279-297 diagnostics 105, 121 dimensions 16, 23 elevation adjustment 199 monitoring 100 orientation 33, 37 power-up 87 quick checks 95 site selection 21 tracking sequence 101 antenna alignment command summary 18 fine-tuning 93 using signal strength 93 using the sun, 92 antenna command 284 antenna control cable
calibration ACU 90-91, 209 TAC-92 87-89, 207 antenna controller bridge rectifier (TAC-92) replacement 224 code (ACU) 137 code (TAC-92) 133-136 diagnostics 96 drive motor test (TAC-92) 97 fan-out replacement 219 logic board (ACU) replacement 231 motor board (ACU) replacement 233 RS232 daughter board (ACU) replacement 232 antenna heater cable conduit 22 diagnostics 99, 120 antenna.calib file 93, 101, 277 antenna.config file 277 assembly of antenna 1.0m 71-77 1.2m/1.5m 37-40 3.0m 77-81 autoalign command 19, 93, 100, 285 autoalign fine command 93 azimuth adjustment 194 azimuth drive belt adjustment 194 replacement 168-169 azimuth drive chain (3.0m antenna) replacement 168 azimuth drive sprocket replacement 154-155, 165-167 azimuth pot adjustment 194 replacement 165-167 azimuth stepper motor replacement 154-155 testing 111-113
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page I-1
Index
B balancing the antenna 202 bridge rectifier (TAC-92) replacement 224
C cabling 1.0m antenna 71 1.2m/1.5m antenna 38-40 3.0m antenna 81 HD100 downconverter 38 integrated feed/LNA/downconverter 39 calibrating antenna control cable ACU 90, 209 TAC-92 87, 207 azimuth pot 194 elevation pot 199 commands align 281 alignnorth 282 antenna 284 autoalign 19, 93, 100, 285 man (version 2.6) 279 newsite 296 nmea_monitor 286 safe_ant 19, 105 shipheading 19, 290 sunalign 19, 292 sunclock 19, 293 thelp (version 3.0) 279 trackeye 100, 295 whereami 19, 296 compass type, determining 19 $COMPASS_TYPE0 276 control cable calibration ACU 90, 90-91 TAC-92 87-89
D data loss 103 daughter board (ACU) replacement 232 diagnostics ACU 106-107 antenna controller 96 antenna tracking problems 108-?? downconverter 111-??, 114-116 general system faults 120 heater 120 RF electronics 111-??, 114-116
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TAC-92 106-107 test environment 105 test equipment 105 dimensions of antennas 16, 23 downconverter diagnostics 111-??, 114-116 replacement HD100 175 integrated feed/LNA/downconverter 181 wiring HD100 38 integrated feed/LNA/downconverter 39 drive belt, azimuth adjustment 194 replacement 168-169 drive belt, elevation adjustment 199, 201 replacement 151 drive chain, azimuth (3.0m antenna) replacement 168 drive sprocket replacement azimuth 154-155, 165-167 elevation 138-139 dual-telemetry feed 181
E elevation adjustment 199 elevation drive belt adjustment 199, 201 replacement 151 elevation drive sprocket replacement 138-139 elevation pot adjustment 199 replacement 152-153 elevation stepper motor testing 111-113 elevation stepper motor replacement 138-139 environment variables 3, 276
F feed/LNA replacement 176 feed/LNA/downconverter replacement 181 fine-tuning antenna alignment 93
G gyro frame replacement 170 gyro interface TAC-92, 117
Index
H hardware part numbers 243-245 HD100 downconverter replacement 175 wiring 38 heater cable conduit 22 diagnostics 99, 120
I installation equipment 33 of 1.0m antenna 71-77 of 1.2m/1.5m antenna 37-40 of 3.0m antenna 77-81
L ladder for radome access 24, 25 last_location file 276 LNA 181 logic board (ACU) replacement 231
M magnetic_mode file 276 man command (version 2.6) 279 monitoring the antenna 100 motor board replacement (ACU) 233 TAC-92 222
N $NAVDIR 276, 278 newsite command 296 NMEA messages 19 nmea_monitor command 286 NMEA_MSG_FMT0 277
P part numbers 243-245 $PASSDIR directory 276 $PASSRSVP directory 276 pedestal for 1.0m antenna 25 for 1.2m/1.5m antenna 24 power injector replacement 192
power module (TAC-92) replacement 225 power-up of antenna 87 PROM replacement (TAC-92) 226, 228 version history (TAC-92) 278
Q quick checks of antennna 95
R radome 1.0m antenna description 25 mounting 71 orientation 25 pedestal construction 25 1.2m/1.5m antenna assembly 37 description 24 orientation 24 pedestal construction 24 3.0m antenna assembly and installation 77-78 base frame 33 orientation 33 weight 23 wind load 23 replacing ACU daughter board 232 ACU motor board 233 azimuth drive belt 168-169 azimuth drive sprocket 154-155, 165-167 azimuth pot 165-167 azimuth stepper motor 154-155 elevation drive belt 151 elevation drive sprocket 138-139 elevation pot 152-153 elevation stepper motor 138-139 feed/LNA 176 feed/LNA/downconverter 181 gyro frame 170 HD100 downconverter 175 logic board (ACU) 231 power injector 192 RF electronics 175, 176, 181 TAC-92 bridge rectifier 224 wiring harness 173 RF electronics diagnostics 111-??, 114-116 replacement feed/LNA 176
TeraScan 1.0 m/1.2 m/1.5 m/3.0 m Polar Satellite Tracking Antenna O & M Manual
Rev. G
Page I-3
Index
feed/LNA/downconverter 181 HD100 downconverter 175 RS232 daughter board (ACU) replacement 232
S safe_ant command 19, 105 shipboard orientation of antenna 37 shipheading command 19, 290 shipping blocks 38, 71 SHMEM_NMEA file 276 site selection for antenna 21 size of antennas 16, 23 software antenna commands 279-297 TeraScan 2.6 and 3.0 versions compared 3 startup of antenna 83 stepper motor replacement azimuth 154-155 elevation 138-139 testing 111-113 sunalign command 19, 292 sunclock command 19, 293 system.config file 3, 95, 277
diagnostics 95, 106-107 drive motor test 97 entering current settings 230 fan-out replacement 219 motor board replacement 222 power module replacement 225 PROM replacement 226, 228 recording current settings 228 source of stepper motor problems 111-113 testing ACU 96, 106-107 stepper motors 111-113 TAC-92 95, 96, 106-107 thelp command (version 3.0) 279 $TKCKTP 277, 278 $TKCLOCK 277 tkconfig file 294 tkconfig0 file 93, 101, 276 $TKPORTxy 276 tool kit 125 trackeye command 100, 295 tracking sequence 101 TRACKSxy 101 tscan.login 277
W T TAC-92 antenna controller bridge rectifier replacement 224 code 133-136 control cable calibration 87, 207
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whereami command 19, 296 wiring HD100 downconverter 38 integrated feed/LNA/downconverter 39 wiring harness replacement 173
