Operating Manual Transmission Test Set 806a / 806ar

Transcript

OPERATING MANUAL TRANSMISSION TEST SET 806A / 806AR (C) Copyright 2011 CONVEX CORPORATION Charge battery at least once a week. 900 dB BATT 600 dBm LOW 135 dBrn 100 mSec RCV SND CHG POWER LOW MIN HIGH MID BRDG REV SND RCV RCV SND/2W A B ! 60 Hz REJECT REMOD 500 kHz DELAY 200 kHz LEVEL MEAS C DIAL BRDG SND RCV REV RCV SND/2W 15 kHz ! TO GND E (ISDN) W TONE D (DATA) DELAY DIAL TIMER SKIP S/N 3.4 kHz IMPLS QUIET IMPLS SWEEP F2/1004 F3/2804 C MSG FILTER dBm TLP VAR SEND SET FREQ SWEEP START/STOP VOL F1/404 D 900 dB 600 dBm dBrn 135 mSec 100 A F (HDSL) MEAS CONVEX 806A TIMS ZERO IMPLS NOISE FILTER 0 kHz TONE LOSS F4/40k PC/232 CONTROL 1 RCV SND MIN MID HIGH TONE LOSS kHz F4/40k 60 Hz REJECT IMPLS F (HDSL) TO GND E (ISDN) REMOD 500 kHz W TONE D (DATA) DELAY DIAL TIMER SKIP DELAY 200 kHz S/N 3.4 kHz IMPLS QUIET IMPLS SWEEP SWEEP dBm TLP VAR START/STOP SEND SET FREQ LEVEL LOW B ZERO PC/232 CONTROL MEAS 15 kHz FILTER NOISE MEAS VOL C MSG FILTER F3/2804 CONVEX 806AR TIMS OPERATING MANUAL TRANSMISSION TEST SET 806A / 806AR (C) Copyright 2011 CONVEX CORPORATION Issue Date October 2011 www.ConvexCorp.com F2/1004 1 POWER F1/404 0 Model 806A / 806AR SECTION 1 1-1 1-2 1-3 GENERAL CONTENTS PAGE SECTION 1 INTRODUCTION.....................1-1 MANUAL OVERVIEW..................1-1 806A MEASUREMENT GROUP...........1-1 DEFINITIONS 1-4 1-5 1-6 1-7 1-8 1-9 1-10 1-11 1-12 1-13 1-14 1-15 1-16 1-17 1-18 1-19 1-20 1-21 1-22 1-23 1-24 1-25 1-26 1-27 1-28 1-29 1-30 1-31 1-32 1-33 1-34 1-35 1-36 1-37 1-38 1-39 1-40 1-41 1-42 1-43 1-44 1-45 1-46 1-47 1-48 1-49 1-50 LEVEL............................1-1 dBm..............................1-1 LOSS.............................1-1 ATTENUATION DISTORTION...........1-1 GAIN SLOPE.......................1-2 4 Hz OFFSET......................1-2 NOISE............................1-2 dBrn.............................1-2 NOISE with TONE..................1-2 S/N..............................1-2 NOISE to GROUND..................1-2 TLP..............................1-2 dBm0.............................1-2 BRIDGE...........................1-2 FILTERS..........................1-2 C MSG FILTER.....................1-2 D FILTER.........................1-2 3.4 kHz FLAT FILTER..............1-2 E FILTER.........................1-3 DSL..............................1-3 F FILTER.........................1-3 HDSL.............................1-3 15 kHz FILTER....................1-3 200 kHz FILTER...................1-3 500 kHz FILTER...................1-3 60 Hz REJECT FILTER..............1-3 FREQUENCY........................1-3 DELAY............................1-3 REMOD............................1-3 FORWARD REFERENCE................1-3 RETURN REFERENCE.................1-3 LOCAL DELAY......................1-3 STRAIGHTAWAY DELAY...............1-4 IMPULSE NOISE....................1-4 IMPULSE THRESHOLD................1-4 COUNTING INTERVALS...............1-4 IMPULSE NOISE with TONE..........1-4 TONE LOSS........................1-4 TONE HIGH........................1-4 IMPULSE NOISE to GROUND..........1-4 P/AR.............................1-4 RETURN LOSS......................1-4 HYBRID...........................1-4 ERL..............................1-4 SRLL.............................1-4 SRLH.............................1-4 ECD..............................1-4 SPECIFICATIONS SPECIFICATIONS PAGE Transient Timer....................1-5 Extended Round Trip Delay..........1-5 Envelope Delay.....................1-5 Generator..........................1-5 Input / Output Ports...............1-5 Monitor............................1-5 Dial...............................1-5 Temperature........................1-5 PC Control.........................1-5 Power..............................1-5 Dimensions / Weight,Portable.......1-5 Dimsions / Weight, Rack Mount......1-5 SECTION 2 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 2-12 2-13 2-14 2-15 2-16 2-17 2-18 2-19 2-20 2-21 2-22 2-23 2-24 2-25 INSTALLATION INTRODUCTION.....................2-1 RECEIVING INSPECTION.............2-1 RECEIVING OPERATIONAL CHECK......2-1 OPERATIONAL CHECK FAILURE........2-1 BATTERY OPERATION - Portable.....2-1 LOW BATTERY SHUTDOWN.............2-1 I/O CONNECTIONS - Portable.......2-1 PC CONTROL - Portable Unit.......2-2 PADDED FIELD CASE................2-2 MOUNTING - Rack Mount Unit.......2-2 POWER - Rack Mount Unit..........2-2 I/O CONNECTIONS - Rack Mount.....2-2 I/O JACKS - Rack Mount Unit......2-2 COMPUTER HOOKUP - Rack Mount.....2-2 MODEM HOOKUP - Rack Mount........2-3 SUPPORT..........................2-3 WARRANTY.........................2-3 PRODUCT REPAIR SERVICE...........2-3 INTRODUCTION - PC OPERATION......2-3 SOFTWARE INSTALLATION............2-3 SOFTWARE COMMAND LINE OPTIONS....2-4 USB TO SERIAL ADAPTER............2-4 SOFTWARE INSTALLATION TEST.......2-4 SOFTWARE TROUBLE SHOOTING........2-5 MAXIMUM RATINGS..................2-5 SECTION 2 ILLUSTRATIONS FRONT PANEL - PORTABLE.................2-1 FRONT PANEL - RACK MOUNT...........2-2/2-3 SIDE PANEL - PORTABLE..................2-2 FIELD CASE.............................2-2 Fig 2-1 806A - PC CABLE...............2-3 Fig 2-2 806A - MODEM CABLE............2-3 Fig 2-3 PC SCREEN - LEVEL MEAS........2-4 Fig 2-4 PC SCREEN - COMM FAILURE......2-5 SECTION 3 3-1 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 806A / 806AR Level..............................1-5 Frequency..........................1-5 Filters............................1-5 Noise, Noise w Tone................1-5 S/N Ratio......................... 1-5 Noise to Ground....................1-5 3-Level Impulse Noise..............1-5 C -1 FRONT PANEL OPERATION INTRODUCTION PANEL OPERATION.....3-1 AUTO-TEST DEMONSTRATION..........3-1 BATTERY INDICATOR................3-1 LOW BATTERY SHUTDOWN.............3-1 I/O CONNECTIONS - PORTABLE.......3-2 I/O CONNECTIONS - RACK MOUNT.....3-2 RECEIVE BRIDGE / TERM............3-2 LINE HOLD........................3-2 I/O REVERSE......................3-2 I/O IMPEDANCE....................3-2 Model 806A / 806AR SECTION 3 3-10 3-11 3-12 3-13 3-14 3-15 3-16 3-17 3-18 3-19 3-20 3-21 3-22 3-23 3-24 3-25 3-26 3-27 3-28 3-29 3-30 3-31 3-32 3-33 3-34 3-35 3-36 3-37 3-38 3-39 3-40 FRONT PANEL OPERATION CONTENTS PAGE SECTION 4 RCV / SND SELECTION..............3-2 UNITS SELECTION..................3-2 MEASUREMENTS SWITCH..............3-3 LEVEL FILTER Switch..............3-4 NOISE Switch.....................3-4 NOISE FILTER Switch..............3-4 START/STOP - GENERATOR SWEEP.....3-5 ZERO - IMPULSE COUNT.............3-5 SEND LEVEL (dBm) SETUP...........3-5 QUIET............................3-5 DIAL Send Mode...................3-5 TLP/THL SETUP....................3-5 IMPULSE NOISE THRESHOLD SETUP....3-6 IMPULSE NOISE TIMER SETUP........3-6 IMPULSE NOISE COUNT RATE SETUP...3-6 SEND FREQUENCY SETUP.- SND.......3-5 SEND FREQUENCY SETUP.- RCV.......3-5 SWEEP.led........................3-6 SKIP.(SF SKIP)...................3-6 FUNCTION / FREQUENCY KEYS........3-6 CHANGING A FREQUENCY KEY.........3-6 SENDING / PRINTING A REPORT......3-7 DISPLAYING AUTO-TEST RESULTS.....3-7 POWER-UP DEFAULTS LEVEL MODE.....3-7 AUTO-TEST DEFAULTS...............3-7 VF AUTO-TEST DEFAULTS............3-7 DSL AUTO-TEST DEFAULTS...........3-7 HDSL AUTO-TEST DEFAULTS..........3-7 RUNNING AUTO-TEST - SENDING......3-8 RUNNING AUTO-TEST - RECEIVING....3-8 LED TEST (LAMP TEST).............3-8 SECTION 3 4-16 4-17 4-18 4-19 4-20 4-21 4-22 4-23 4-24 4-25 4-26 4-27 4-28 4-29 4-30 4-31 4-32 4-33 4-34 4-35 4-36 4-37 4-38 4-39 4-40 4-41 SECTION 4 4-1 4-1A 4-1B 4-1C 4-1D 4-1E 4-2 4-3 4-4 4-5 4-6 4-7 4-8 4-9 4-10 4-11 4-12 4-12A 4-12B 4-13 4-14 4-15 PAGE ILLUSTRATIONS Figure 4-1A 806A - PC CABLE...........4-1 Figure 4-1B 806A - MODEM CABLE........4-1 Figure 4-1C COMM. SETUP Screen........4-1 Figure 4-1C1 MEAS. SELECTION Screen....4-2 Figure 4-1C2 LEVEL/FREQUENCY Screen....4-2 Figure 4-1E VF AUTO-TEST Report.......4-2 Figure 4-2 BATTERY CHECK Screen......4-2 Figure 4-6 BRIDGE / TERM Selector....4-3 Figure 4-8 NORMAL / REV. Selector....4-3 Figure 4-11 UNITS SELECTION Screen....4-4 Figure 4-12 MEASUREMENTS MENU.........4-4 Figure 4-12A LEVEL/FREQUENCY Screen....4-4 Figure 4-12A1 HDSL AUTO-TEST Report....4-5 Figure 4-12B DELAY, STRAIGHTAWAY......4-5 Figure 4-12B1 VF AUTO-TEST REPORT......4-6 Figure 4-13 LEVEL FILTER..............4-6 Figure 4-14 NOISE w TONE - S/N........4-7 Figure 4-14A NOISE to GROUND Screen....4-7 Figure 4-18 GENERATOR QUIET Screen....4-8 Figure 4-20 DIAL Screen...............4-8 Figure 4-21 TLP SELECTION Screen......4-9 Figure 4-22 IMPULSE NOISE THRESHOLD...4-9 Figure 4-25 GENERATOR FREQUENCY.......4-9 Figure 4-29 FUNCTION / FREQ. KEYS....4-10 Figure 4-31 VF LEVEL AUTO-TEST REPORT.4-10 POWER-UP DEFAULTS TABLE...............4-10 DEFAULTS TABLE, AUTO-TEST.............4-10 Figure 4-39 VF AUTO-TEST Report......4-11 Figure 4-39A ATTN DIST GRAPH Screen...4-11 COMMUNICATION PARAMETERS Table........4-11 ILLUSTRATIONS PANEL NOMENCLATURE, PORTABLE...........3-1 PANEL NOMENCLATURE, RACK MOUNT.....3-2/3-3 UNITS SELECTION TABLE..................3-2 POWER-UP DEFAULTS TABLE................3-7 DEFAULTS TABLE, AUTO-TEST..............3-7 SECTION 4 PC OPERATION START/STOP - GENERATOR SWEEP.....4-8 ZERO - IMPULSE COUNT.............4-8 SEND LEVEL (dBm) SETUP...........4-8 QUIET............................4-8 DIAL Send Mode...................4-8 TLP/THL SETUP....................4-9 IMPULSE NOISE THRESHOLD SETUP....4-9 IMPULSE NOISE TIMER SETUP........4-9 IMPULSE NOISE COUNT RATE SETUP...4-9 SEND FREQUENCY SETUP SND / RCV...4-9 SEND FREQUENCY SETUP.- RCV ......4-9 SWEEP CONTROL / INDICATORS.......4-9 SKIP.(SF SKIP)...................4-9 FUNCTION / FREQUENCY KEYS........4-9 CHANGING A FREQUENCY KEY .......4-10 PRINTING A REPORT OR GRAPH......4-10 DISPLAYING AUTO-TEST RESULTS....4-10 POWER-UP DEFAULTS LEVEL MODE....4-10 AUTO-TEST DEFAULTS..............4-10 VF AUTO-TEST DEFAULTS...........4-10 DSL AUTO-TEST DEFAULTS..........4-10 HDSL AUTO-TEST DEFAULTS.........4-10 RUNNING AUTO-TEST - SENDING.....4-11 RUNNING AUTO-TEST - RECEIVING...4-11 COMMUNICATION PARAMETERS........4-11 COMMUNICATIONS PROTOCOLS........4-11 PC OPERATION INTRODUCTION - PC OPERATION......4-1 HOOK-UP 806A / PC................4-1 MODEM HOOK-UP....................4-1 START-UP.........................4-1 CURSOR OPERATION.................4-2 AUTO-TEST DEMONSTRATION..........4-2 BATTERY CHECK ................4-2 LOW BATTERY SHUTDOWN.............4-3 I/O CONNECTIONS - PORTABLE.......4-3 I/O CONNECTIONS - RACK MOUNT.....4-3 RECEIVE BRIDGE / TERM............4-3 LINE HOLD........................4-3 I/O REVERSE......................4-3 I/O IMPEDANCE....................4-3 RCV / SND SELECTION..............4-3 UNITS SELECTION..................4-3 LEVEL MEASUREMENT SELECTION......4-4 LEVEL............................4-4 DELAY............................4-5 LEVEL FILTER SELECTION...........4-6 NOISE - MEASUREMENT..............4-7 NOISE FILTER SELECTION...........4-8 C-2 Model 806A / 806AR GENERAL Section 1 900 dB BATT 600 dBm LOW 135 CHG dBrn 100 POWER mSec RCV MIN SND LOW MID HIGH TONE LOSS BRDG REV SND RCV RCV SND/2W A ! B DIAL ZERO IMPLS F (HDSL) TO GND E (ISDN) W TONE D (DATA) DELAY DIAL F3/2804 VOL DELAY 200 kHz S/N 3.4 kHz IMPLS QUIET IMPLS SWEEP F2/1004 LEVEL 15 kHz NOISE C MSG SWEEP dBm TLP VAR SEND SET FREQ MEAS FILTER START/STOP TIMER SKIP 500 kHz FILTER CONVEX 806A TIMS REMOD MEAS C 60 Hz REJECT 0 kHz F4/40k PC/232 CONTROL 1 F1/404 D 1-1 INTRODUCTION The Convex Model 806A (or 806AR) TIMS (Transmission Impairment Measuring Set) measures analog transmission parameters of communications facilities. It has signal generation and measurement capability to support a wide range of services including: Telephone Service, DATA, Program, DDS, DSL (ISDN basic rate) and HDSL. It measures: LEVEL, DELAY, FREQUENCY, NOISE, NOISE with TONE, S/N RATIO, NOISE to GROUND, IMPULSE NOISE, IMPULSE NOISE with TONE, and IMPULSE NOISE to GROUND per IEEE Standard 743-1995. 1-3 806A MEASUREMENT GROUP The 806A is outfitted with those measurements that are useful for qualifying, maintaining, and trouble-shooting facilities for services spanning POTS to HDSL. All measurements (LEVEL, DELAY, FREQUENCY, NOISE and IMPULSE NOISE) that apply universally for VF through HDSL (wideband) transmission are included. Further, all measurements comply with IEEE Standard 743-1995. 1-4 LEVEL Level is the power inferred by the amplitude of a sinewave voltage across a standard resistive termination. Power is expressed in dBm (dB relative to one milliwatt) and the measuring set provides standard receive terminations of 100, 135, 600, or 900 Ohms. An average detector is the standard means to measure the effective value of the sinewave. An rms detector is appropriate for non-sinusoidal waveforms such as noise. High-pass and Low-pass Filters provide a means of rejecting out-of-band noise as a potential source of measurement error. The 806A is easy to operate from the front panel (or from a personal computer) and it has AUTO-TEST capability for VF, DSL and HDSL facilities. Front panel controls are simple and utilize large bright LED displays and indicators. The 806A also comes with control software that runs under DOS or a DOS Window. The PC communicates with the test set through an RS-232 Port located on the rear or side of the test set. The PC can be connected directly, or it can be remoted via modems. 1-5 dBm (dB relative to one milliwatt) dBm = 10LOG10(V2/R) where V is the effective voltage and R is the termination resistance in kohms (600 ohms = 0.6 kohms). A RACK MOUNTED version, 806AR, is available for permanent installations. The PORTABLE, 806A, includes a rechargeable battery that powers the set for more than 8 hours. The 806A recharges in 8 hours and can be operated while recharging. The 806A is accurate, rugged and economical. 1-6 LOSS Loss is the dB difference in power measured at a facilities output compared to power available to the input. (The "power available to the input" is the power available to a standard termination matched to the test set send impedance.) + dB loss implies input power is greater than output power. To facilitate comparison, loss is measured at standard reference frequencies. 1004 Hz is a standard reference frequency in North America. 1-2 MANUAL OVERVIEW Section 1 includes: a brief description of the 806A/AR TIMS, a discussion of measurements, definitions, and the technical specifications for the 806A / 806AR. Section 2 has three parts. The first part covers installation, I/O connections, Power, Battery and operational tests. The second part discusses Support, Warranty, and Repair Service. The third part handles the issues related to PC control such as software installation, cable hookup and operational tests. Section 3 describes how to operate the 806A from the Front Panel. Section 4 describes how to operate the 806A from software running on a PC. 1-7 ATTENUATION DISTORTION Attenuation distortion (frequency response) is the loss in dB measured at various frequencies (with constant power available to the input) compared to the standard reference frequency. + dB implies more loss than at the reference frequency. 1-1 Model 806A / 806AR GENERAL Section 1 900 BRDG SND RCV dB REV 600 dBm RCV SND/2W 135 dBrn mSec 100 A ! RCV SND MIN LOW MID HIGH TONE LOSS kHz B CONVEX 806AR TIMS 1-8 GAIN SLOPE Gain slope refers to attenuation distortion measured at 404, 1004, and 2804 Hz. The 404 Gain Slope is the dB difference between 404 and 1004 Hz. The 2804 Gain Slope is the dB difference between 2804 and 1004 Hz. 1-15 TLP Transmission Level Point TLP is the design gain in dB at a particular point in the facilities compared to a reference point (0 TLP). When asserted, the test set TLP feature offsets level readings so that power is referred to a 0 TLP. An actual level of +14.0 dBm at a +13 dB TLP infers 1.0 dBm at a 0 TLP. This is referred to as 1.0 dBm0 (dB relative to one milliwatt, referred to a 0 TLP). The TLP feature is also used to refer Noise to a 0 TLP. 1-9 4 Hz OFFSET A 4 Hz offset avoids measurement errors associated with PCM (Pulse Code Modulation) when transmission frequencies are small integral submultiples of the 8 kHz sampling rate. 1-16 dBm0 dBm0 = dB relative to one milliwatt, referred to a 0 TLP. 1-10 NOISE Noise is the power inferred by the voltage across a standard resistive termination when weighted by a standard filter. Noise is expressed in dBrn (dB relative to one picowatt) and the measuring set provides a standard receive termination of 100, 135, 600, or 900 Ohms. An rms detector is used to measure the effective voltage. 1-17 BRIDGE The receive of the measuring set is put into bridge mode to measure voltage across an "external" termination such as the input of a line card. In bridge mode, receive impedance must be set to match the external termination in order for the measuring set to apply the proper impedance factor. 1-11 dBrn (dB relative to one picowatt) ( dBrn = dBm + 90 ) dBrn = 10LOG10 (V2/R) +90 where V is the effective voltage and R is the termination resistance in kohms (600 ohms = 0.6 kohms). 1-18 FILTERS Filters are an integral part of Noise or Impulse Noise Measurements and play an important roll in Level and Delay Measurements. Filters used for Noise or Impulse Noise have specific spectral weightings that pass only that energy which falls in the transmission band of interest for a particular service. Filters used for Level or Delay are designed to reject noise that is outside of the measurement band of interest for a particular service. 1-12 NOISE with TONE Noise with Tone is noise measured by sending a nominal 1004 Hz "holding" tone which simulates transmission traffic. The measuring set deploys a notch filter that eliminates the holding tone prior to measuring the noise. 1-19 C MSG FILTER (C Message) - VOICE The C Filter is used to weight Noise or Impulse Noise as it relates to voice telephone service. C weighting corresponds to listener perceived annoyance when using a 500-type telephone set. 1-13 S/N (SIGNAL to NOISE RATIO) The S/N ratio measurement (S/TD, Signal to Total Distortion) is the dB ratio of the power of a nominal 1004 "holding" tone to power with the holding tone removed with a notch filter. "Total Distortion" in place of "Noise" emphasizes that the notch filter passes both "additive" and "correlated" noise. Correlated noise includes signal: harmonics, quantizing noise, phase jitter and amplitude jitter. 1-20 D FILTER - VF DATA / FAX The D Filter, also known as the "CCITT O.41 Channel Bank Filter", weights Noise or Impulse Noise as it relates to VF data or fax transmission. The 3 dB bandwidth extends from 300 Hz to 3,400 Hz so as to approximate the transmission spectrum of a 28.8 / V.34 Modem. 1-14 NOISE to GROUND (Note that facilities ground can be substantially different from the AC Mains safety ground!) Noise to Ground measures ("longitudinal") noise that is common to both conductors of a 2 wire pair with respect to facilities ground. It is measured using a 100 kohm resistive termination and, by convention, is referred to a 600 Ohm reference (dBrn600 or dBm600). Excessive longitudinal noise will show up as metallic noise. Nominal levels of longitudinal noise appears as "metallic" (differential) noise when there is inadequate balance. 1-21 3.4 kHz FILTER - VF DATA / FAX The 3.4 kHz Flat Filter superseded the 3 kHz Flat Filter and weights Noise or Impulse Noise as it relates to VF data or fax transmission. The 3.4 kHz Flat Filter passes frequencies below 300 Hz so as to be useful in detecting low frequency interference such as 20, 60 and 120 Hz. 1-2 Model 806A / 806AR PC/232 CONTROL 60 Hz REJECT REMOD 500 kHz DELAY LEVEL MEAS GENERAL ZERO F4/40k IMPLS F (HDSL) TO GND E (ISDN) W TONE D (DATA) DELAY DIAL 200 kHz S/N 3.4 kHz IMPLS 15 kHz NOISE C MSG SWEEP FILTER Section 1 MEAS FILTER VOL START/STOP F3/2804 TIMER SKIP QUIET IMPLS SWEEP dBm TLP VAR SEND SET FREQ F2/1004 1 POWER F1/404 0 taken out when using the 15 kHz, 200 kHz, or 500 kHz Flat Filters. (The 60 Hz REJECT Filter introduces delay at low frequencies and should not be deployed when measuring DELAY below 4 kHz.) 1-22 E FILTER - DSL (IDSN Basic Rate), DDS (Digital Data System) The E Filter is used to measure Level, Noise or Impulse Noise on 2 or 4 Wire circuits used for DSL or DDS Transmission. The 3 dB bandwidth extends from 1 kHz to 50 kHz and approximates filters used in DSL Terminators. 1-30 FREQUENCY Frequency is the number of cycles of a periodic waveform per second. 1-23 DSL (Digital Subscriber Line) DSL is synonymous with ISDN Basic Rate. It uses "2B1Q" (2 Binary 1 Quaternary) line code and has a bi-directional transfer rate of 160 kb/s on a 2 wire pair. 144 kb/s is available to the user (2B1D, two 64 kb/s, one 16 kb/s channel). The pair is terminated by a LT (Line Termination) at the central office and an NT1 (Network Termination) at the user's location. 1-31 DELAY (EDD - Envelope Delay Distortion) Delay or EDD makes no statement as to actual input to output transmission time delay. Delay is the difference in transmission time of various frequencies compared to that of a (zero) reference frequency. It is common to select the reference (typically 1804 Hz) close to the frequency of minimum delay. Delay is measured by detecting change in phase of the 83 1/3 Hz envelope of the received test signal as frequency is varied. The reference for the phase detector is an 83 1/3 Hz oscillator which, for 4 wire measurements, is sent to the far end of the circuit under test. At the far end, a REMOD (remodulation) unit extracts the 83 1/3 Hz and returns it to the measuring set. 1-24 F FILTER - HDSL The F Filter is used to measure Level, Noise or Impulse Noise on 2 Wire circuits used for HDSL Transmission. The 3 dB bandwidth extends from 5 kHz to 245 kHz and approximates filters used in HDSL (HTU) Terminal Units. 1-25 HDSL (High Bit Rate Digital Subscriber Line) HDSL has a bi-directional transfer rate of 784 kb/s on a 2 wire pair. 768 kb/s is available to the user (12B, twelve 64 kb/s channels). The pair is terminated by an HTU-C (HDSL Terminal Unit) at the central office and an HTU-R at the user's (remote) location. Two HDSL loops provide 1.544 Mb/s (T1 / DS1) transmission. 1-32 REMOD (Remodulation) For 4 wire delay measurements, remodulation (performed at the far end of the circuit) returns the 83 1/3 Hz reference to the measuring set. 1-33 FORWARD REFERENCE - DELAY Forward reference applies to 4 wire delay measurement where the measuring set forwards the 83 1/3 Hz to the REMOD unit on a constant frequency carrier. The REMOD unit outputs a modulated variable frequency carrier which is used to measure EDD of the channel going toward the measuring set. 1-26 15 kHz FILTER - VF LEVEL, DELAY / PROGRAM NOISE The 15 kHz Flat Filter is used for Level, Loss, Attenuation Distortion, and EDD on VF Facilities. It is also used to weight noise as it relates to program quality audio. 1-34 RETURN REFERENCE - DELAY Return reference applies to 4 wire delay measurement where the REMOD unit returns the 83 1/3 Hz to the measuring set on a constant frequency carrier. The measuring set outputs a modulated variable frequency carrier which is used to measure EDD of the channel going away from the measuring set. 1-27 200 kHz FILTER - DSL, DDS, PROGRAM LEVEL / DELAY The 200 kHz Flat Filter is used to measure Level, Loss, Attenuation Distortion, and EDD of DSL, DDS or Program Facilities. 1-28 500 kHz FILTER - HDSL LEVEL / DELAY The 500 kHz Flat Filter is used to measure Level, Loss, Attenuation Distortion, and EDD of HDSL Facilities. 1-35 LOCAL DELAY Local delay mode is used in 4 wire situations where it is desirable to connect the measuring set to both ends of the circuit (or line card) under test. "Local" delay mode is also used when measuring round trip EDD of a 4 wire circuit by deploying a far end loop-back. 1-29 60 Hz REJECT (HUM REJECTION) FILTER The 60 Hz REJECT (high-pass) Filter is used to reject low frequency interference such as 20 Hz ringing, 60 Hz mains, and 120 Hz rectified mains noise when performing LEVEL measurements. It can be asserted or 1-3 Model 806A / 806AR GENERAL Section 1 600 Ohm reference (dBrn600). High longitudinal transients show up as metallic events. Moderate longitudinal transients appears as metallic events when there is inadequate balance. 1-36 STRAIGHTAWAY DELAY. Expanded use of 2 Wire data transmission (FAX, Modem, ISDN DSL, and HDSL) has increased the need for a 2 Wire, STRAIGHTAWAY EDD Measurement. (The Convex 806A introduced a patended, EDD which handles VF, DSL, and HDSL bands, measures on a 2 wire basis, is comparable to, and compatible with the Standard 4 Wire EDD Measurement.) Straightaway Delay is measured in a manner similar to attenuation distortion - there is a signal generation unit on the send end and a measuring unit on the receive end. In Straightaway Delay, EDD and attenuation distortion are measured simultaneously. This technique eliminates the need to take an additional circuit out of service for a reference return. 1-44 P/AR Peak / Average Ratio measures the simultaneous effects of envelope delay distortion, attenuation distortion, and low return loss on VF data transmission. A P/AR of 100 signifies no distortion. The P/AR generator sends a signal which consists of 16 frequencies between 141 and 3891 Hz with precise amplitude and phase characteristic. The P/AR receiver processes the signal and provides the measurement. 1-45 RETURN LOSS Return Loss is the dB ratio of reflected power to transmitted power. It is a measure of the impedance of the circuit under test compared to a reference impedance. RL = 20log10[(Zcir +Zref)/(Zcir - Zref)] Return Loss can be measured on a 2 Wire or 4 Wire Basis. When measuring on a 2 Wire basis, the 806C provides a precision internal hybrid which can be set for a reference impedance of 600 or 900 Ohms. 1-37 IMPULSE NOISE Impulse Noise is voltage transients which have peaks that are more than 12 dB above the steady state noise for a given weighting filter and resistive termination. Impulse Noise is measured by counting the number of peaks that exceed a setable threshold (or thresholds) during a counting interval. A maximum count rate (8 or 100 events per second) is imposed to avoid registering multiple counts due to ringing associated with an individual event. 1-46 HYBRID A hybrid is a device for converting 2 Wire transmission to 4 Wire transmission and vice versa. 1-38 IMPULSE THRESHOLD Impulse threshold voltage is stated in dBrn and calibrated to equal the peaks of a sinewave with steady state power that is 3 dB lower. e.g. The peaks of a 90 dBrn (0 dBm) sinewave correspond to a 93 dBrn threshold. 1-47 ERL Echo Return Loss is measured with a mid band spectrum with frequencies in the range of 300 to 3000 Hz. 1-48 SRLL Singing Return Loss Low is measured with a low frequency spectrum ranging from 120 to 1000 Hz. 1-39 COUNTING INTERVALS Impulse Counting Intervals can be set in 1 Minute increments. However, for ease of comparison, intervals of 5 and 15 minutes are commonly used. 1-49 SRLH Singing Return Loss High is measured with a high frequency spectrum ranging from 1500 to 4000 Hz. 1-40 IMPULSE NOISE with TONE Impulse Noise with Tone is noise measured by sending a nominal 1004 Hz "holding" tone to simulate transmission traffic. The measuring set deploys a notch filter that eliminates the holding tone prior to detecting the impulse voltage. Impulse Noise with Tone counting is inhibited during a "tone loss" or "tone high" condition. 1-50 ECD Echo Canceler Disable tone sequence is used to deactivate echo cancelers so that the intrinsic circuit return loss can be measured. 1-41 TONE LOSS Tone Loss occurs when the received holding tone drops below -40 dBm. 1-42 TONE HIGH "Tone high" occurs when the received holding tone is greater than + 10 dBm or when harmonic content of the holding tone is sufficient to exceed the asserted impulse threshold. 1-43 IMPULSE NOISE to GROUND (IMPLS to GND) (Note that facilities ground can be substantially different from the AC Mains safety ground!) Impulse Noise to Ground measures (longitudinal) transients that are common to both conductors of a 2 wire pair with respect to facilities ground. It is measured using a 100 kohm resistive termination and, by convention, referred to a 1-4 Model 806A / 806AR GENERAL Section 1 SPECIFICATIONS 806A TIMS / 806AR TIMS TRANSIENT TIMER Timer Set 1 Minute Steps up to 8 Hours Resolution 1 Second Accuracy ± 1 Second LEVEL Dynamic Range Freq. Range Resolution Detector Accuracy +24 dBm -40 dBm -80 dBm -80 to +24 dBm 15 kHz, 200 kHz-600/900 -70 to +24 dBm 200 kHz, 500 kHz -20 to +20 dB TLP offset 20 Hz to 300 kHz 0.1 dB Average or RMS, Selectable ±0.5 dB ±0.5 dB 20Hz ±0.2 dB ±0.5 dB 200Hz ±0.5 dB ±1.0 dB 15kHz EXTENDED ROUND TRIP DELAY Dynamic Ranges 0 to 1,000,000 uSec, 0 to 3,000,000 uSec Resolution 1 uSec Accuracy ±5 uSec ±1 dB ±2 dB ENVELOPE DELAY Dynamic Range -3000 to +9000 uSec Frequency Range 200 Hz to 300 kHz RCV Level -40 to +20 dBm SEND Level -40 to +7 dBm Modulation 50% AM, 83 1/3 Hz Resolution 1 uSec Accuracy ±10 uSec Operating Modes 2W Straightaway - Patented 22 tone , Local, Forward / Return Reference Remodulation Forward / Return Reference 200kHz 300kHz 1002 to 1022 Hz / 0 to -19 dBm: ±0.1 dB Filters Hum Reject, IN/OUT High Pass, -60 dB at 60 Hz 15 kHz Flat, VF Low Pass, -3 dB at 15 kHz 200 kHz, Wide Band Low Pass, -3 dB at 200 kHz 500 kHz, Extra WB Low Pass, -3 dB at 500 kHz FREQUENCY Count Range Level Range Resolution Accuracy 20 Hz to 300 kHz -50 to +24 dBm - 15 kHz Bandwidth -40 to +24 dBm - 200 kHz Bandwidth -30 to +24 dBm - 500 kHz Bandwidth 1 Hz to 30 kHz, 10 Hz to 300 kHz ±1 Hz to 30 kHz, ±10 Hz to 300 kHz GENERATOR Dynamic Range Resolution Accuracy Flatness Freq. Range Resolution NOISE, NOISE w TONE Dynamic Range 10 to 114 dBrn or -80 to +24 dBm for C MSG, 3.4 kHz, D, E, 15 kHz Filters 20 to 114 dBrn or -70 to +24 dBm for 200 kHz, F, 500 kHz Filters Holding Tone -40 to +10 dBm / 995 to 1025 Hz Resolution 0.1 dB Detector RMS Accuracy ±1 dB Accuracy TH Distortion Quick Freq's -41 to +10 dBm 0.1 dB Steps ±0.1 dB -19 to 0 dBm, ±0.2 dB at 1 kHz ±0.2 dB to 15 kHz, ±1 dB to 300 kHz 20 to 300 kHz 1 Hz - to 4 kHz, 10 Hz - to 30 kHz, 100 Hz - to 300 kHz ±1 Hz to 10 kHz, ±30 Hz to 300 kHz, -50 dB at 1004 Hz, -40 dB: 20 Hz - 300 kHz 4 Programmable Frequency Keys Auto Sweep:VF, DSL, HDSL / 500 kHz INPUT / OUTPUT PORTS Quantity 2 Measure / Dial Ports - Portable: A/C, B/D Rack Mount: A, B Ports on front and rear Operation 2 Wire, 4 Wire Impedance 100, 135, 600, 900 Ohms Independent RCV / SEND Selection Return Loss 135, 600, 900: 30 dB / 100: 15 dB Receive Bridge Less than 0.2 dB Loss Hold Dual, 23 ma Nominal S/N RATIO (S/TD RATIO, signal to total distortion) Dynamic Range 10 to 50 dB (excludes E and F Filters) Holding Tone -40 to +10 dBm / 995 to 1025 Hz Resolution 0.1 dB Accuracy ±1 dB NOISE to GROUND (Power Influence) Dynamic Range 30 to 140 dBrn, or -60 to +50 dBm 40 to 140 dBrn, -50 to +50 dBm: F/500 kHz Resolution 0.1 dB Accuracy ±1 dB GENERAL MONITOR DIAL TEMP PC CONTROL POWER 3-LEVEL IMPULSE NOISE, IMPULSE NOISE w TONE Dynamic Range 30 to 115 dBrn - C, D, 3.4, 15 kHz Filters 40 to 115 dBrn - 200 kHz, E, F Filters 50 to 115 dBrn - 500 kHz Filter Impulse w Tone excludes E and F Filters Thresholds 3 /LOW, MID (+4 dB), HI (+8 dB) Accuracy ± 1 dB Count Capacity 32,000 Count Rate 8, 100 Counts/Second Holding Tone -40 to +10 dBm / 1002 to 1022 Hz Loss of TONE Measurement halted, auto resume PORTABLE WEIGHT RACK MOUNT WEIGHT 1-5 Speaker with Volume Control Parallel Bantam Jacks for Dial / Talk - 806A Operate +0 to +50 C / Store -40 to +71 C Serial Port: RS-232 / 9 pin D Connector, 115 VAC +/-10%, Option: 100 or 230 VAC 806A Battery Run: 8 Hrs. / Recharge: 8 Hrs. 9.0 x 11.0 x 3.5 Inches 229 x 279 x 89 mm 9.0 lbs. / 4.1 kg. including Battery 7.5 x 19.0 x 1.7 Inches 191 x 483 x 43 mm 5.0 lbs. / 2.3 kg. Model 806A / 806AR GENERAL Section 2 900 dB BATT 600 dBm LOW 135 dBrn 100 mSec RCV SND CHG POWER MIN LOW MID HIGH A ! B 60 Hz REJECT IMPLS F (HDSL) TO GND E (ISDN) REMOD 500 kHz W TONE D (DATA) DELAY DIAL TIMER SKIP DELAY 200 kHz S/N 3.4 kHz IMPLS QUIET IMPLS SWEEP LEVEL C DIAL 15 kHz FILTER NOISE MEAS ZERO F3/2804 SWEEP C MSG FILTER CONVEX 806A TIMS PC/232 CONTROL MEAS 0 kHz TONE LOSS F4/40k REV BRDG SND RCV RCV SND/2W 1 START/STOP dBm TLP VAR SEND SET FREQ VOL F2/1004 F1/404 D Startup defaults can be changed by setting the desired parameters, then simultaneously pressing and holding the F2 and F4 Function Keys on the far right of the panel. 2-1 INTRODUCTION This section is organized into five parts dealing with: Receiving Inspection, Installation Portable Unit, Installation - Rack Mount Unit, Support and Service, and Installation - PC Control Software. Receiving Inspection consists of a visual examination and brief operational check to verify that the 806A has not been damaged in transit. Installation - Portable Unit discusses battery operation / recharge, I/O connections and the field case. Installation - Rack Mount Unit discuses mounting, I/O hook-up, and power. Support and Service includes factory assistance with applications, operation, repairs, or recalibration. Installation - PC Control Software discusses software installation, RS232 cable hook-up, direct connection, modem connection and start-up. 2-5 BATTERY OPERATION - PORTABLE UNIT The 806A operates for more than 8 hours on a fully charged battery. Although charge rate is reduced, the instrument can be operated while recharging. Charging can proceed at any time that is convenient, but charge the battery at least once a week. The BATT indicator LED advises as follows: LED ON: OPERATING ON BATTERY / CHARGE GOOD QUICK BLINK: OPERATING ON BATTERY/ CHARGE LOW SLOW BLINK: OPERATING ON AC / CHARGING BATTERY LED OFF: OPERATING ON AC / BATTERY CHARGED 2-2 RECEIVING INSPECTION Prior to shipment each 806A is tested electrically and inspected for good mechanical condition. New units should be free of mechanical defects and new (or repaired) units should be in good operating order. Inspect the equipment on receipt to insure that it has not been damaged in transit. If damage is observed, retain the shipping carton and its contents and file a claim with the freight carrier. 30 minutes of operating time remain from the onset of the CHARGE LOW indication. Extended operation on low charge will ultimately trigger low battery shutdown to prevent degraded operation or battery damage. 2-6 LOW BATTERY SHUTDOWN Low battery shutdown occurs when the 806A is operated on "low" battery beyond 30 minutes, or if the battery was disconnected or replaced. When shutdown occurs the front panel goes dark even though the power switch is on. Connect the power cord to the AC mains to start charging or to operate the 806A. The BATT indicator has a slow, 1 second, blink while charging and turns off when the battery is charged. 2-3 RECEIVING OPERATIONAL CHECK (For portable units, connect the power cord to the connector.) Plug the power cord into an AC mains receptacle and turn on the power switch located on the far right. (For portable units, connect alligator ends of the test leads together to form a bantam to bantam cable.) Insert a bantam to bantam cable into the front panel A and B Jacks thereby connecting the receive (RCV) to the send (SND) port. Verify that the left display reads 0.0 dBm +/- 0.2 dB and that the right display reads 1.004 kHz +/- 1 Hz. Rotate the VOL knob and verify that the audio monitor is adjustable from quiet to loud. 2-7 I/O CONNECTIONS - PORTABLE UNIT Bantam Jacks located on the lower left corner of the panel provide connections for measurement signals. A is the NORMAL receive port and B is the NORMAL send port. C is wired in parallel with A and provides a means to connect a butt set to dial/talk on the A pair. D is wired in parallel with B and provides a means to connect a butt set to dial/talk on the B pair. The receive pair is put into bridge (BRDG) to release line hold (on-hook), the send pair is put into DIAL to release line hold to permit pulse dialing. 2-4 OPERATIONAL CHECK FAILURE If the operational check fails contact the factory for assistance. The operational check depends on the following start-up defaults: RCV and SND Impedance set to 600 Ohms, measuring LEVEL, generator ON and set for 0.0 dBm / 1004 Hz. Note the status of startup defaults. 2-1 Model 806A / 806AR GENERAL Section 2 900 BRDG SND RCV dB REV 600 dBm RCV SND/2W 135 dBrn mSec 100 A ! RCV SND MIN LOW MID HIGH TONE LOSS kHz B CONVEX 806AR TIMS 2-10 MOUNTING - RACK MOUNT UNIT The 806AR mounts in 1U vertical space (1.75 inches) of a 19 inch rack or cabinet. It is attached to the cabinet using four machine screws (not furnished ) through holes in either end of the front panel. Since the 806AR is less than 8 inches deep, check the access to the rear panel terminal block prior to mounting. If access is limited, make the necessary electrical connections to the rear panel prior to mounting. Rear panel electrical connections consist of the following: 1. AC mains power Power Cord attached 2. Measurement signals, 2 Pair - T/R Terminals 3. PC Control / RS232 cable 9 Pin D Connector 2-8 PC/CONTROL - PORTABLE UNIT. The PC/REMOTE CONTROL Port can be permanently connected. The front panel controls of 806A operate when the port is not active. The port is an RS-232, serial data port located on the side of the unit. It has DCE "polarity" and is directly cabled to a PC serial (DTE) port with a 9 pin, Male to Female Cable. 2-11 POWER - RACK MOUNT UNIT The power cord for the 806AR is permanently attached to the rear panel. It plugs into a mains receptacle. A separate, external power line fuse is not required. The 806AR has an internal (0.25 amp) power line fuse. Typical ac current draw is less than 0.1 amp. The power switch is located on the far right side of the front panel. 2-9 PADDED FIELD CASE The padded field case protects exterior surfaces of the instrument from being scratched or dented due to impacts with other hard objects. The 806A can be operated from within the field case by lifting the top lid of the field case to expose the front panel. The field case has an accessory compartment for manuals and test leads. It is designed so that the computer cable and power cord can be left attached to the 806A and tucked into a side compartment when not in use. When needed, the computer cable or power cord can be quickly accessed while leaving the 806A in the field case. 2-12 I/O CONNECTIONS - RACK MOUNT UNIT Measurement signal pairs for the 806AR are normally wired to a computer controlled Metallic Test Access Unit (MTAU) or a manual test panel. Connect measurement signal wires to the terminal block located on the rear. The receive pair is wired to the A T/R contacts on the front panel. The send pair is wired to the B T/R contacts. 2-13 I/O JACKS - RACK MOUNT UNIT Bantam Jacks located on the front panel are wired in parallel (A to A, B to B) with the rear terminal block. They provide alternate ports for temporarily connecting measurement signals to the 806AR (when the rear connections are open.) The jacks also provide a means to connect a butt set to dial/talk on the A or B pair. The receive (A) pair is put into bridge (BRDG) to release line hold (on-hook), the send (B) pair is put into DIAL to release line hold to permit pulse dialing. 2-14 COMPUTER HOOKUP - RACK MOUNT UNIT The PC/REMOTE CONTROL Port can be permanently connected. The front panel controls of 806AR operate when the port is not active. The port is an RS-232, serial data port located on the rear panel of the 806AR. It has DCE "polarity" and is directly cabled to a PC serial (DTE) port with a 9 pin, Male to Female Cable. 2-2 Model 806A / 806AR PC/232 CONTROL 60 Hz REJECT REMOD 500 kHz DELAY LEVEL MEAS GENERAL Section 2 ZERO F4/40k IMPLS F (HDSL) TO GND E (ISDN) W TONE D (DATA) DELAY DIAL 200 kHz S/N 3.4 kHz IMPLS 15 kHz NOISE C MSG SWEEP MEAS FILTER FILTER VOL F3/2804 START/STOP TIMER SKIP QUIET IMPLS SWEEP dBm TLP VAR SEND SET FREQ F2/1004 1 POWER F1/404 0 806A/AR - 9 Pin D MALE 1 2 3 4 5 6 7 8 9 - DCD RD TD DTR SG DSR RTS CTS RI 9 Pin D FEMALE 1 2 3 4 5 6 7 8 9 CONVEX CORPORATION 1319 Shepard Drive Sterling, VA 20164 USA (Check www.convexcorp.com for current information.) Include a note: - PC Trouble description Your name / phone number Return shipping address 2-17 WARRANTY All Convex products are warranted to be free of manufacturing defects for a period of one year from the date of shipment. At its option, Convex will either repair or replace products which prove to be defective during the warranty period, provided they have not been subject to misuse, accident, or unauthorized alterations and are returned to the factory with transportation prepaid. Convex will promptly return the repaired product, transportation prepaid within the USA. No other warranties are expressed or implied. Convex Corporation is not liable for consequential damages. Figure 2-1 806A - PC CABLE Communications parameters are discussed below under Software Command Line Options - Section 2-23. 2-15 MODEM HOOKUP - RACK MOUNT UNIT The PC/REMOTE CONTROL Port can be permanently connected. (The front panel controls of 806AR operate when the port is not active.) This is an RS232, serial data port located on the rear panel of the 806AR. Having DCE "polarity" it requires a "Null Terminal" / 9 to 25 pin conversion to interface with the modem. 2-18 PRODUCT REPAIR SERVICE Post warranty repair service is available for Convex products. Where there is no observable mechanical damage, the Model 806A or 806AR will be repaired and/or recalibrated for a fixed fee. Otherwise, Convex will advise as to the nature and cost of repair and, subject to customer instructions, will promptly repair and return the product. Return the 806A or 806AR to the factory annually for recalibration. 9 Pin D 25 Pin D MALE MALE 1 - DCD open DCD - 8 2 - RD ------ TD - 2 3 - TD ------ RD - 3 4 - DTR ------- DSR - 6 806AR - 5 - SG ------- SG - 7 - MODEM 6 - DSR ------- DTR -20 7 - RTS ------- CTS - 5 8 - CTS ------- RTS - 4 9 - RI open RI -22 2-19 INTRODUCTION - PC OPERATION A PC can be used to control the 806A or 806AR instead of using the front panel controls. There are four main advantages to PC Control. First, PC control permits more parameters to be displayed simultaneously. Second, an 806A can be remote controlled via dial-up modems. Third, data measured using auto-test features can be saved as computer files for subsequent recall into reports - saving time compared to manually recording results. Fourth, a printer can be attached to the PC to provide immediate reports or graphs. Figure 2-2 806A - MODEM CABLE 2-16 SUPPORT We invite your comments, questions or technical support requirements. On the Internet: http://www.convexcorp.com e-mail: [email protected] Tel: 703-433-9901 / 2-20 SOFTWARE INSTALLATION Software installation is required in order for the 806A to be controlled by a PC. Control Software furnished with the 806A runs under DOS or a DOS Window on an IBM Compatible PC. Fax: 703-433-9904 If repair work is required, ship the product to the factory: 2-3 Model 806A / 806AR GENERAL DOS (non-Windows) INSTALLATION: 1. Create a folder on your hard disk named 806A. 2. Copy TIMS.EXE, SELECTP.EXE and BDRV.PDT from the disk or CD into the 806A folder. 3. Run SELECTP and choose a printer. 4. Run TIMS.EXE to control the 806A. Section 2 2-22 USB to Serial Adapter / Windows XP USB to serial adapters have been used sucessfilly. Configure the USB serial adapter for com1 or com2 by digging into the driver and changing the setup. Windows XP Example: 1. Open: Control Panel --> Performance and Maintenance --> System 2. From the System dialog box select the Hardware tab and then the Device Manager button. 3. From the Device Manager list expand Ports. Then right click on the USB Serial Port and select Properties. 4. From the Properties dialog box select the Port Settings tab and then the Advanced button. 5. From the Advanced dialog box, re-assign the com port. SETTING UP TO PRINT GRAPHICS (all installations): If you plan to print the sweep graphics available from the TIMS Software, you must run the Printer Select (SELECTP.EXE) program in order to pick the printer you'll be using. If you later change printers run the Printer Select program again and slect a new printer. If your printer is not on the list, check your printer documentation to see if it will emulate one on the list. Other operating systems may require a different path to get to the driver setup. WINDOWS INSTALLATION: 1. Create a folder on your hard disk named 806A. 2. Copy TIMS.EXE and TIMS.ICO from the media into the 806A folder. 3. Create a shortcut to TIMS.exe on the desktop 4. On the desktop, right click the shortcut and select properties. 5. Use the properties to select TIMS.ICO as the icon. 6. Use the properties to set Full Screen and High Idle Sensitivity. High idle sensitivity eliminates loss of data coming in the serial port due to Windows servicing background activities. Windows can still have other applications open in the background while TIMS is running. 2-23 SOFTWARE INSTALLATION TEST 2-21 SOFTWARE COMMAND LINE OPTIONS Command line options permit bypassing the communications and measurement screens to go directly to a particular measurement. The command line is of the form "TIMS.EXE w x y" where w x and y are separated by spaces. With w and x specifying communications selections and y specifying a measurement selection as follows: 3. Verify that the LEVEL MEASUREMENT PC SCREEN, shown below, appears. Receive Level and Frequency is displayed on the 5th line from the bottom. Verify that this line reads: RCV A 0.0 dBm (+/- 0.2 dB) and 1.004 kHz +/- 1 Hz. w selects the Comm Port - w = 1, 2, 3, or 4 x selects the Baud Rate - x = 1200, 2400, 4800, 9600, or 19200 y selects the measurement: 0 = LEV/FREQ, 1 = NOISE, 4 = TRANS 10 = BATT CHECK, 11 = DIAL 15 kHz 1. Connect a 9 pin cable (ref 2-15) between serial com1 port on the PC and the RS-232 DCE Port on the 806A. Plug the power cord into an AC mains receptacle and turn on the power switch located on the far right. Insert a bantam to bantam cable into the front panel A and B Jacks thereby connecting the receive (RCV) to the send (SND) port. Verify that the left display reads 0.0 dBm +/0.2 dB and that the right display reads 1.004 kHz +/- 1 Hz. Rotate the VOL knob and verify that the audio monitor is adjustable. 2. From a DOS Prompt, run the following command line: TIMS.EXE 1 19200 0 ( Reference Section 2-21 ) ================================d:com1== LEV/FREQ 6-20 14:09 [ ] RCV A + 0.0 dBm 600 TERM 1.004 kHz NORM 4W SND B + 0.0 dBm 600 TERM 1.004 kHz SWEEP 404 1004 2804 40k CONT DATA MENU Figure 2-3 PC SCREEN-LEVEL MEASUREMENT Example: C:\806A\TIMS.EXE 1 19200 0 selects: Comm Port 1, 19200 Baud Rate, and LEV/FREQ Measurement. 1 19200 0 is the most common command line option setting for direct PC to test set connections. Operation of the 806A from the PC is covered in Section 4 of the Manual. Use the Esc Key to back up through menus and to exit the program. 2-4 Model 806A / 806AR 2-24 SOFTWARE TROUBLE SHOOTING above fails, then check the following: GENERAL If step 3 1. Did the TIMS Program run? If so the screen should start with a black background with large white characters "System Initialization in progress". If not recheck Section 2-20 SOFTWARE INSTALLATION. 2. The TIMS Program ran but failed to communicate with the TIMS (Test Set). In this case, the following screen appears: ================================d:com1== v2.07 0 SN:0 UNABLE TO COMMUNICATE WITH TEST SET MENU Figure 2-4 PC SCREEN - COMM. FAILURE Recheck the cable connections and that the 806A is powered ON. Power the test set OFF then back ON to reset the on-board processor then rerun the TIMS Program. Use the Esc Key to back up through menus and to exit the program. 2-25 MAXIMUM RATINGS (Bantam Jacks) Maximum differential (tip to ring) voltage: 30 V Maximum voltage applied to tip or ring relative to the ground terminal of the AC Power Connector or chassis metal: 250 V PC / Remote Control RS-232 Port (DB9) Maximum Voltage applied to any pin relative to pin 5 (signal ground): +/- 25 V 2-5 Section 2 Model 806A / 806AR FRONT PANEL OPERATION FREQUENCY DISPLAY UNITS SWITCH LEVEL DISPLAY IMPEDANCE INDICATORS IMPEDANCE SWITCH RECEIVE / SEND DISPLAY SWITCH Section 3 UNITS INDICATORS BATTERY STATUS INDICATOR POWER SWITCH IMPULSE INDICATORS CONTOL CURSOR 900 dB BATT 600 dBm LOW 135 dBrn 100 mSec RCV SND CHG POWER MIN LOW MID HIGH REV BRDG SND RCV RCV SND/2W BRIDGE / TERM RECEIVE JACK SEND JACK A DIAL JACK B DIAL JACK A ! B PC/232 CONTROL 60 Hz REJECT REMOD 500 kHz DELAY 200 kHz LEVEL MEAS 250V MAX C DIAL 15 kHz FILTER F(245 kHz) TO GND E (50 kHz) W TONE D (DATA) DELAY DIAL TIMER SKIP S/N 3.4 kHz IMPLS QUIET IMPLS SWEEP F2/1004 NOISE C MSG FILTER CONVEX 806A TIMS ZERO IMPLS MEAS 0 kHz TONE LOSS F4/2713 A/B REVERSE 1 F3/2804 SWEEP START/STOP dBm TLP VAR SEND SET FREQ VOL F1/404 D LEVEL / DELAY SWITCH NOISE / IMPULSE SWITCH LEVEL / DELAY FILTER SWITCH NOISE / IMPULSE FILTER SWITCH GENERATOR LEVEL CONTROL TLP / IMPULSE CONTROL GENERATOR SWEEP / IMPULSE TIMER CONTROL AUDIO VOLUME FUNCTION / FREQUENCY KEYS GENERATOR FREQUENCY CONTROL RECEIVE SWEEP INDICATOR 3. After the SWEEP led stops blinking, press and hold the F3 + F4 Keys simultaneously until the panel leds are blinking. 3-1 INTRODUCTION FRONT PANEL OPERATION This section describes operation of the 806A using the front panel switches and indicators. Topic titles and numbering has been arranged to correspond to the comparable topics in Section 4 (PC OPERATION) for ease of comparison. Operation using the front panel controls is usually more convenient for making quick checks. Front panel controls definitely get the job done if it isn't convenient to use of a Personal Computer. (Operation using a PC has some advantages including saving test results as data files.) 4. Use the UP/DOWN Cursor to scroll through the frequency points on the right display. The associated data is shown on the left display. Use the UNITS Switch to toggle between dBm and mSec. 3-2 BATTERY INDICATOR (Portable units only) The battery status indicator led, located near the power switch, provides the following indications to let the user know the condition of the battery: Note: Front panel switches are not operable while the unit is being remotely controlled by a PC. The PC/232 CONTROL led on the front panel is lit when the PC has control. LED ON: OPERATING ON BATTERY / CHARGE GOOD QUICK BLINK: OPERATING ON BATTERY/ CHARGE LOW SLOW BLINK: OPERATING ON AC / CHARGING BATTERY LED OFF: OPERATING ON AC / BATTERY CHARGED In general, briefly pressing and releasing the switch at the base of a column of led indicators will increment the lit led to the next allowed state. Some functions are only activated by pressing and holding the switch for about one second (4 WIRE RETURN LOSS, 60 Hz REJECT, DIAL, SKIP and some function key operations). Portable and rack mounted versions operate the same except that the rack unit does not have the battery status indicator. Refer to the drawings in this section for panel nomenclature. A "Fully Charged" indication occurs when the battery voltage reaches about 6.9 volts. The 806A can be left connected to the AC mains with no adverse effects. Although the charge rate is reduced, the instrument can be operated while recharging. Further, charging can proceed at any time that is convenient. 30 minutes of operating time remain from the onset of the CHARGE LOW indication. Extended operation on low charge will ultimately trigger low battery shutdown to prevent degraded operation and battery damage. AUTO-TEST DEMONSTRATION Although the 806A has lots of capability and flexibility, the auto-test feature makes it a breeze to operate. This process automatically measures (and stores) LOSS, ATTENUATION DISTORTION, EDD and background NOISE. 1. Power ON and connect the B / SEND Jack to the A / RECEIVE Jack. 2. Set measurement to DELAY and press the Sweep START/STOP Control. That's all it takes - test results are available in about 2.5 minutes. Observe the Frequency Display and note that the SWEEP led is blinking. 3-3 LOW BATTERY SHUTDOWN Low battery shutdown occurs when the 806A is operated on "low" battery beyond 30 minutes, or if the battery was disconnected or replaced. When shutdown occurs the front panel goes dark even though the power switch is on. Connect the power cord to the AC mains to start charging or to operate the 806A. The BATT indicator has a slow, 1 second, blink while charging and turns off when the battery is charged. 3-1 Model 806A / 806AR FRONT PANEL OPERATION IMPEDANCE INDICATORS A/B REVERSE BRIDGE / TERM UNITS INDICATORS LEVEL DISPLAY 900 BRDG REV SND RCV RCV SND/2W ! B dBm 135 dBrn mSec RCV SND MIN LOW MID HIGH TONE LOSS kHz CONVEX 806AR TIMS 250V MAX IMPEDANCE SWITCH FREQUENCY DISPLAY dB 600 100 A Section 3 RECEIVE / SEND DISPLAY SWITCH UNITS SWITCH IMPULSE INDICATORS LEVEL / DELAY SWITCH LEVEL / DELAY FILTER SWITCH NORMAL: Receive on A Jack - Send on B Jack REVERSE: Receive on B Jack - Send on A Jack 3-4 I/O CONNECTIONS - PORTABLE UNIT Bantam Jacks located on the lower left corner of the panel provide connections for measurement signals. A is the NORMAL receive jack and B is the NORMAL send jack. C is wired in parallel with A and provides a means to connect a butt set to dial/talk on the A pair. D is wired in parallel with B and provides a means to connect to the B pair. Line hold is automatic. The receive pair is put into bridge (BRDG) to release hold. The send pair is put into DIAL to release hold. 3-9 I/O IMPEDANCE Use 600 (or 900) Ohms for voice frequency data or POTS. Use 100 (or 135) Ohms for ISDN, HDSL or other wideband services. Note: The 806A automatically sets the SEND and RCV Impedances to default values when sending or receiving an auto-test tone sequence. Factory defaults are 600 Ohms for VF, 135 Ohms for ISDN / DSL, and 100 Ohms for HDSL tone sequences. 3-5 I/O CONNECTIONS - RACK MOUNT UNIT Measurement signal pairs for the 806AR are normally wired to a computer controlled Metallic Test Access Unit (MTAU) or a manual test panel. Connect the measurement signal wires to the terminal block located on the rear. The receive pair is wired to the A T/R (Tip/Ring) contacts. The send pair is wired to the B T/R contacts. When the RCV led is lit the IMPEDANCE INDICATORS display the current receive impedance. When the SND led is lit the IMPEDANCE INDICATORS display the current SEND impedance. Use the IMPEDANCE Switch to set impedance. Be aware that impedance selection performs two functions: 1. The selected terminator is switched. 2. The corresponding impedance factor is applied. 3-6 RECEIVE BRIDGE / TERM Put the 806A into bridge mode to measure across an "external" termination such as the input of a line card. The BRIDGE / TERM Switch toggles the receiver between the selected termination impedance (100, 135, 600 or 900 ohms) and high impedance bridging. The BRDG led is lit in bridge mode and off when the receiver is terminated. 3-10 RCV / SND SELECTION The RECEIVE / SEND DISPLAY Switch toggles the LEVEL and FREQUENCY DISPLAYS between showing current receive measurement results, and showing the settings of the generator. RCV and SND leds indicate the current state. This state also determines the mode of the IMPEDANCE INDICATORS and IMPEDANCE Switch (described in 39). In bridge mode, set the receive impedance to match the external termination in order for the measuring set to apply the proper impedance factor. Light the RCV led to measure Level or Noise. Light the SND led to set or monitor the generator. 3-7 LINE HOLD Receive line hold is enabled when the line is terminated. The receive line is put into bridge (BRDG) to release line hold (BRDG led is lit). (Note: The send pair is put into DIAL Mode to release line hold.) Go to BRDG Mode to (dial) establish a circuit, then switch BRDG - OFF to hold and terminate the circuit while testing. 3-11 UNITS SELECTION The function of the UNITS Switch (located between the displays) is dependent on the measurement mode: SELECTIONS MODE DISPLAY LEVEL/REMOD LEFT dBm ON - TLP = 0.0 dB dBm blinks - TLP Asserted DELAY LEFT dBm, mSec NOISE LEFT dBrn, dBm IMPULSE RIGHT LOW, MID, HIGH 3-8 I/O REVERSE Use the I/O Reverse when testing a dial line in both directions to facilitate send / receive change-over while maintaining line hold. The REV led is lit in REVERSE mode and off in NORMAL mode. The A/B REVERSE Switch toggles between NORMAL and REVERSE modes where: In LEVEL (or REMOD) Mode, use the Units Switch to refer the Receive Level reading to a non-zero Transmission Level Point - dBm led blinks. 3-2 Model 806A / 806AR FRONT PANEL OPERATION RECEIVE SWEEP INDICATOR 60 Hz PC/232 CONTROL REJECT IMPLS F(245 kHz) TO GND E (50 kHz) CONTROL CURSOR ZERO VOL F3/2804 REMOD 500 kHz W TONE D (DATA) DIAL TIMER SKIP DELAY 200 kHz S/N 3.4 kHz IMPLS QUIET IMPLS LEVEL 15 kHz NOISE C MSG SWEEP dBm TLP SWEEP F2/1004 VAR START/STOP SEND SET FILTER MEAS FILTER / DELAY SWITCH NOISE / IMPULSE SWITCH / DELAY FILTER SWITCH NOISE / IMPULSE FILTER SWITCH AUDIO VOLUME F4/2713 DELAY MEAS Section 3 FREQ F1/404 1 POWER 0 POWER SWITCH GENERATOR LEVEL CONTROL GENERATOR SWEEP / IMPULSE TIMER CONTROL FUNCTION / FREQUENCY KEYS GENERATOR FREQUENCY CONTROL TLP / IMPULSE CONTROL Switch the dBm led to ON to remove the TLP offset. (See TLP SETUP 3-21) FORWARD REFERENCE Mode is used to measure RCV path DELAY. The measuring set sends a fixed frequency (1204 Hz). The REMOD set sends the sweep frequencies (e.g. 204, 304, ... 3504, 3604 Hz) to be measured. On the REMOD set, select the appropriate sequence (normally 15 kHz) and press the START/STOP Control to send SWEEP frequencies to the measuring set. In DELAY Mode, use the Units Switch to toggle between mSec Delay and dBm Receive Level. In NOISE Mode, use the Units Switch to select between dBrn and dBm. Select dBrn for measuring per the North American / Bell Standards. Use dBm for measuring noise per ITU-T / CCITT (European) Recommendations or to assert the rms detector for level measurements. RETURN REFERENCE Mode is used to measure SEND path DELAY. The measuring set sends the frequencies (e.g. 204, 304, ... 3604 Hz) to be measured. The REMOD set sends a fixed frequency (e.g. 1204 Hz). On the measuring set, select the appropriate sequence (normally 15 kHz) and press the START/STOP Control to send SWEEP frequencies to the REMOD Unit. In IMPULSE NOISE Mode, use the Units Switch to toggle among Low, Mid, and High event counters. 3-12 MEASUREMENT Switch - MEASUREMENT SELECT The test set defaults to LEVEL Mode when power is turned on. Use the MEASUREMENT to select among LEVEL, DELAY, and REMOD. Also use this switch to return to Level Mode after measuring NOISE. "LOCAL" DELAY method is used in 4 wire situations where it is desirable to connect the measuring set to both ends of the circuit or device under test (See 1-35). Select DELAY and press the START/STOP Control so that the measuring set generator sends SWEEP frequencies back to it's own receiver. (See 3-13 regarding VF, DSL, HDSL sweep selection.) Select LEVEL Mode to measure LEVEL, LOSS, ATTENUATION DISTORTION, or GAIN SLOPE. (See 14 to 1-8 ) Select LEVEL for units on both ends of the circuit. Press the START/STOP Control on the SEND Unit to launch SWEEP frequencies. (See 3-13 regarding VF, DSL, HDSL sweep selection.) For checking equipment: SND is connected to equipment input RCV is connected to equipment output Select DELAY Mode to measure EDD (Envelope Delay Distortion) and ATTENUATION DISTORTION simultaneously. Use the Units Switch to select between mSec Delay and dBm Level. Note: An incoming EDD tone sequence will automatically switch the measurement from LEVEL to DELAY. Further, the Level / Delay Filter selection of the SENDING Unit automatically sets the bandwidth filter of the RECEIVING Unit. STRAIGHTAWAY DELAY Straightaway Delay (requires two 806A's) permits measuring delay from end to end on a 2 wire basis which avoids taking an additional circuit out of service. Select DELAY for units on both ends. Press the START/STOP Control on the SEND Unit to launch SWEEP frequencies to the RECEIVE / measuring Unit. (See 3-13 regarding VF, DSL, HDSL sweep selection.) FORWARD REFERENCE / RETURN REFERENCE With the exception of a "straightaway" or "loopback technique", delay measurements are unique in that a FORWARD or RETURN REFERENCE signal path is required: FROM or TO the RCV / Measuring set. At the far (Non-measuring) end, DELAY "REMODULATION" (REMOD) function is required. Forward or Return Reference methods are used for measuring DELAY on 4 wire circuits (See 1-33 and 1-34). REMOD Select REMOD when the measuring Forward or Return Reference EDD. Remodulation Mode is used at the far end of a 4 wire circuit to return the Delay / EDD signal to the measuring unit. (The REMOD unit modulates its send signal with amplitude modulation detected from its receive signal.) 3-3 Model 806A / 806AR FRONT PANEL OPERATION In Forward Reference, press the SWEEP START Control so that the REMOD unit sends SWEEP frequencies to the measuring unit. (See 3-13 regarding VF, DSL, HDSL sweep selection.) In Return Reference, set the REMOD unit generator to send a fixed 1204 Hz to the measuring unit. Section 3 60 Hz REJECT Filter Assert this (highpass) filter to reject low frequency interference such as ringing or AC mains noise when performing LEVEL measurements. It can be asserted or taken out when using the 15 kHz, 200 kHz, or 500 kHz Filters. The 60 Hz Reject Filter is asserted by pressing and holding the LEVEL FILTER Switch until the 60 Hz REJECT led changes state (about 1 sec). (The 60 Hz REJECT Filter introduces delay at low frequencies and should not be deployed when measuring DELAY below 4 kHz.) EXTENDED ROUND TRIP DELAY is used to measure the input to output transmission time of a system. It is an absolute time measurement made at a single frequency normally 1804 Hz. The test signal is first zeroed with the test set generator directly connected to the receiver. Then the signal is passed through the system under test and returned (round trip) to the test set. The test set displays delay in milliseconds 3-14 NOISE Switch - MEASUREMENT SELECT The NOISE Switch is used in the conventional manner to enter NOISE mode and to further select among the types of noise measurements (S/N, W TONE, TO GND). (Also select an appropriate noise filter per Section 3-15 below.) PROCEDURE - Extended Round Trip Delay Noise with Tone measurements are normally used on PCM facilities to exercise the process (compandors) over a large dynamic range. 1. On the front panel, select the 15 kHz Filter and select DELAY Measurement Mode. Then press the MEAS Key for about one second until the DELAY LED blinks. Noise to Ground measures (longitudinal) noise common to both conductors of the receive pair with respect to facilities ground. 2. Connect test set SEND directly to the RECEIVE. When the display settles, ZERO the delay reading. Then wait for the zero reading to settle. Select NOISE (only) to measure background or idle channel noise in dBm or dBrn on the receive pair. The send end provides a quiet termination. The test set can be rezeroed after being connected to the system provide delay is not subsequently reduced! Select NOISE + S/N to measure Signal to Noise (Signal to Total Distortion) Ratio in dB on the receive pair. The send end provides a 1004 Hz holding tone. 3. Connect the test set to the system under test and record the delay when the display settles. 3-13 LEVEL / DELAY FILTER Switch Filters used for Level or Delay are designed to reject noise that is outside of the measurement band of interest for a particular service. The Level Filter Switch determines the receive bandwidth by selecting among the 15 kHz, 200 kHz and 500 kHz Low Pass Filters and it also controls the 60 Hz REJECT Filter. Note: An incoming auto-test tone sequence will automatically select the appropriate filter. Select NOISE + W TONE to measure Noise with Tone in dBm (or dBrn) on the receive pair. The send end provides a 1004 Hz holding tone. Select NOISE + TO GND to measure Noise to Ground (longitudinal noise) in dBm600 (or dBrn600) that is common to the receive pair with respect to facilities ground. On the measuring unit, connect the RCV pair to A and connect the B / SEND Ring (Red alligator clip lead) to facilities ground. The send end provides a quiet termination. (See 1-14) VF - Select 15 kHz for measuring Level, Loss, Attenuation Distortion, Delay, Remod, and Noise on VF Facilities - or - to cause the generator to launch the VF test tone sequence. (See 3-16) 3-15 NOISE FILTER Switch Filters are an integral part of Noise Measurements. They have specific spectral weightings that pass only that energy which falls in the transmission band of interest for a particular service. Use the NOISE FILTER Switch to select among the C MSG, 3.4 kHz, D, E and F Filters. The E and F filters are not available for notched-noise measurements: S/N, NOISE W TONE. DSL - Select 200 kHz for measuring Level, Loss, Attenuation Distortion, Delay, and Noise on ISDN/DSL, DDS Facilities - or - to cause the generator to launch the DSL test tone sequence. (See 3-16) HDSL - Select 500 kHz for measuring Level, Loss, Attenuation Distortion, Delay, and Noise on HDSL Facilities - or - to cause the generator to launch the HDSL test tone sequence. (See 3-16) Select the C MSG FILTER (C Message) for VOICE service. The C MSG filter is used to weight Noise or Impulse Noise as it relates to voice telephone service. C Message weighting corresponds to listener perceived annoyance when using a telephone set. 3-4 Model 806A / 806AR FRONT PANEL OPERATION FREQUENCY DISPLAY UNITS SWITCH LEVEL DISPLAY IMPEDANCE INDICATORS IMPEDANCE SWITCH RECEIVE / SEND DISPLAY SWITCH Section 3 UNITS INDICATORS BATTERY STATUS INDICATOR POWER SWITCH IMPULSE INDICATORS CONTOL CURSOR 900 dB BATT 600 dBm LOW 135 dBrn 100 mSec RCV SND CHG POWER MIN LOW MID HIGH REV BRDG SND RCV RCV SND/2W BRIDGE / TERM RECEIVE JACK SEND JACK A DIAL JACK B DIAL JACK A ! B PC/232 CONTROL 60 Hz REJECT REMOD 500 kHz DELAY 200 kHz LEVEL MEAS 250V MAX C DIAL 15 kHz FILTER F(245 kHz) TO GND E (50 kHz) W TONE D (DATA) DELAY DIAL TIMER SKIP S/N 3.4 kHz IMPLS QUIET IMPLS SWEEP F2/1004 NOISE C MSG FILTER CONVEX 806A TIMS ZERO IMPLS MEAS 0 kHz TONE LOSS F4/2713 A/B REVERSE 1 F3/2804 SWEEP START/STOP dBm TLP VAR SEND SET FREQ VOL F1/404 D LEVEL / DELAY SWITCH NOISE / IMPULSE SWITCH LEVEL / DELAY FILTER SWITCH NOISE / IMPULSE FILTER SWITCH GENERATOR LEVEL CONTROL TLP / IMPULSE CONTROL GENERATOR SWEEP / IMPULSE TIMER CONTROL Select the 3.4 kHz FLAT FILTER for VF DATA / FAX service to detect low frequency interference. The 3.4 kHz Flat Filter replaced the 3 kHz Flat Filter and weights Noise as it relates to VF data or fax transmission. The 3.4 kHz Flat Filter passes frequencies below 300 Hz so as to be useful in detecting low frequency interference such as 20 and 60 Hz. AUDIO VOLUME FUNCTION / FREQUENCY KEYS GENERATOR FREQUENCY CONTROL RECEIVE SWEEP INDICATOR 3-17 ZERO - IMPULSE COUNT Use the ZERO Control to reset the IMPULSE NOISE Counters and Timer in IMPULSE NOISE Mode. 3-18 SEND LEVEL (dBm) SETUP Use the RECEIVE / SEND DISPLAY Switch to set to SND Mode in order to set the send level. Press the GENERATOR LEVEL CONTROL Switch and note the blinking (selected) digit on the LEVEL Display. Use the LEFT / RIGHT CONTROL CURSOR to select the digit and the UP and DOWN CURSOR to adjust the selected digit. Exit SEND LEVEL SETUP mode by pressing the DISPLAY Switch to return to RCV mode or by pressing the GENERATOR FREQUENCY CONTROL Switch to set the send frequency. Note: Send Level can be set when the generator is turned on or is QUIET. Select the D FILTER for VF DATA / FAX service. The D Filter, also known as the "CCITT O.41 Channel Bank Filter", weights Noise as it relates to VF data or fax transmission. The 3 dB bandwidth extends from 300 Hz to 3,400 Hz so as to approximate the transmission spectrum of a 28.8 / V.34 Modem. Select the E FILTER for DSL (IDSN Basic Rate) or DDS (Digital Data System) Service. The E Filter (which replaces the 50 Kilobit Filter) is used to measure Level, or Noise on 2 or 4 Wire circuits used for DSL or DDS Transmission. The 3 dB bandwidth extends from 1 kHz to 50 kHz and approximates filters used in DSL Terminators. 3-19 QUIET Generator Mode Put the generator in QUIET Mode (generator off) to measure background or idle channel NOISE. Use the Generator Level Control to toggle the QUIET led on or off. 3-20 DIAL Send Mode Put the generator in DIAL Mode to release line hold on the B / SND Jack in order to dial and talk on the SEND pair using a butt set. (On portable units, connect the butt set to the D Jack. On rack units, connect the butt set to the B Jack.) Press the Generator Level Control for about 1 second until the DIAL led is lit. To hold (and terminate) the send line, press the Generator Level Control for about 1 second until the DIAL led is off. Select the F FILTER for HDSL Service. The F Filter is used to measure Level, Noise on 2 Wire circuits used for HDSL Transmission. The 3 dB bandwidth extends from 5 kHz to 245 kHz and approximates filters used in HDSL (HTU) Terminal Units. 3-16 START/STOP - GENERATOR SWEEP Use the START/STOP Control to start or stop impulse noise counters and timer while in Impulse Noise Mode. In LEVEL Mode, start or stop the generator (SWEEP) test tone sequence. 3-21 TLP/THL SETUP Transmission Level Point is the design gain in dB at a particular point in the facilities compared to a reference point (0 TLP). When asserted (dBm or dBrn led blinks), the test set offsets level or noise readings so that power is referred to a 0 TLP. (See 1-15 and 3-11). Select the 15 kHz Filter to launch the VF test tone sequence. Select the 200 kHz Filter to launch the DSL test sequence. Select the 500 kHz Filter to launch the HDSL test sequence. 3-5 Model 806A / 806AR FRONT PANEL OPERATION Section 3 To set the TLP, put the display into RCV Mode and set for LEVEL or NOISE Measurement. Press the TLP/IMPULSE CONTROL Switch to display the current TLP on the left display with the TLP led on. Use the CONTROL CURSOR to adjust the TLP, which may be set from -20.0 to 20.0 dB in .1 dB increments. To exit TLP Setup Mode, press the TLP CONTROL. 3-25 SEND FREQUENCY SETUP - SND Mode Put the display in SND mode to view the send frequency while it is being set. Press the FREQ CONTROL to light the VAR led and blink the last used digit on the frequency display. Use the CONTROL CURSOR to set the desired frequency. Press the FREQ CONTROL to exit send frequency setup. 3-22 IMPULSE NOISE THRESHOLD SETUP Impulse threshold voltage is stated in dBrn (or dBm) and calibrated to equal the peaks of a sinewave with steady state power that is 3 dB lower. (The peaks of a -3 dBm sinewave correspond to a 90 dBrn threshold.) Select dBrn or dBm in NOISE Mode prior going to IMPULSE NOISE Mode. 3-26 SEND FREQUENCY SETUP - RCV Mode Send frequency may set while the display is in RCV mode. This is useful when the generator is the source for the receive signal. Put the display in RCV mode to view the receive frequency while the send frequency is being changed. Press the FREQ CONTROL to light the VAR led. Use the CONTROL CURSOR to adjust send frequency. There is only a single blink when the active digit is changed. Press the FREQ CONTROL to exit send frequency setup. To enter threshold setup mode, put the display into RCV Mode and measurement into IMPULSE NOISE Mode. Press the SET CONTROL light the IMPLS LED. The current LOW threshold is on the left display. Use the CONTROL CURSOR to adjust the threshold. The UNITS switch may be used to view the MID and HIGH thresholds which track 4 and 8 dB above the LOW threshold. (The current impulse count is shown on the right display.) To exit threshold setup mode, press the SET CONTROL twice. 3-27 SWEEP led - The SWEEP led just above the VAR led is on to indicate a sweep is in progress, and blinks to indicate that the receive section has detected an autotest tone sequence. The SWEEP led will continue to blink if sweep is interrupted. Press the FREQ CONTROL to stop the blinking when this occurs. 3-23 IMPULSE NOISE TIMER SETUP Impulse Noise is measured by counting the number of peaks that exceed a threshold during a counting interval. The count interval is determined by an adjustable TIMER which may be set from 1 minute to 8 hours in 1 minute increments. 3-28 SKIP (SF SKIP) Single Frequency Skip is deployed to prevent sending tones near 2600 Hz when testing switched facilities that use in band signaling. Press and hold (about 1 sec) the FREQ CONTROL until the SKIP led is lit. To return to normal, press and hold the FREQ CONTROL until the SKIP led is off. To enter TIMER Setup Mode, put the display into RCV Mode and measurement into IMPULSE NOISE Mode. Press the SET CONTROL twice so that TIMER led is on and the current TIMER setting is shown on the left display. Use the CONTROL CURSOR to adjust the timer. If the cursor is moved to the right past the minutes digit, the right display (COUNT RATE) is activated. The up / down cursor will change the count rate between 8 and 100 counts per second. ( See 3-24). Press the SET CONTROL to exit timer setup mode. 3-29 FUNCTION / FREQUENCY KEYS Function / Frequency Keys play two rolls. First - individual keys are pressed to set the generator to one of four "quick" frequencies. Second - pairs of keys are pressed to perform other functions. For the individual keys, factory default frequencies are labeled on the panel. In Level Mode, a frequency key may be changed in a manner similar to reprogramming buttons on a car radio. Return Loss waveforms are not programmable. 3-30 CHANGING A FREQUENCY KEY Put the display in SND mode to view the send frequency while it is being set. Press the FREQ CONTROL to light the VAR led and blink the "last-used" digit on the frequency display. Use the CONTROL CURSOR to set the desired frequency. Press and hold the Frequency Key for about 1 second until the entire right display blinks to indicate that the new frequency was established. 3-24 IMPULSE NOISE COUNT RATE SETUP A maximum impulse count rate of 8 or 100 events per second is imposed to avoid registering multiple counts due to ringing associated with an individual event. 8 is for VF services and 100 is for high speed services. To enter COUNT RATE Setup Mode, put the display into RCV Mode and measurement into IMPULSE NOISE Mode. Press the SET CONTROL twice so that TIMER led is on and the current TIMER setting is shown on the left display. Use the CONTROL CURSOR to move to the right, past the minutes digit, to activate the right / COUNT RATE display. Then use the up / down cursor to change the count rate between 8 and 100 counts per second. Press the SET CONTROL to exit count rate setup mode. CHANGING FREQUENCY AND LEVEL When setting frequency keys as described above, send level is not affected. For special applications, frequency keys can be programmed to a particular frequency and Level as follows: Put the display in SND mode to view the send frequency while it is being set. Press the SEND CONTROL to light 3-6 Model 806A / 806AR FRONT PANEL OPERATION FREQUENCY DISPLAY UNITS SWITCH LEVEL DISPLAY IMPEDANCE INDICATORS IMPEDANCE SWITCH RECEIVE / SEND DISPLAY SWITCH Section 3 UNITS INDICATORS BATTERY STATUS INDICATOR POWER SWITCH IMPULSE INDICATORS CONTOL CURSOR 900 dB BATT 600 dBm LOW 135 dBrn 100 mSec RCV SND CHG POWER MIN LOW MID HIGH REV BRDG SND RCV RCV SND/2W BRIDGE / TERM RECEIVE JACK SEND JACK A DIAL JACK B DIAL JACK A ! B PC/232 CONTROL 60 Hz REJECT REMOD 500 kHz DELAY 200 kHz LEVEL MEAS 250V MAX C DIAL 15 kHz FILTER F(245 kHz) TO GND E (50 kHz) W TONE D (DATA) DELAY DIAL TIMER SKIP S/N 3.4 kHz IMPLS QUIET IMPLS SWEEP F2/1004 NOISE C MSG FILTER CONVEX 806A TIMS ZERO IMPLS MEAS 0 kHz TONE LOSS F4/2713 A/B REVERSE 1 F3/2804 SWEEP START/STOP dBm TLP VAR SEND SET FREQ VOL F1/404 D LEVEL / DELAY SWITCH NOISE / IMPULSE SWITCH LEVEL / DELAY FILTER SWITCH NOISE / IMPULSE FILTER SWITCH GENERATOR LEVEL CONTROL TLP / IMPULSE CONTROL GENERATOR SWEEP / IMPULSE TIMER CONTROL the dBm led. Use the CONTROL CURSOR to set the desired level. Press and hold the Frequency Key for about 1 second until the entire right display blinks to indicate that the new frequency and level was established. AUDIO VOLUME FUNCTION / FREQUENCY KEYS GENERATOR FREQUENCY CONTROL RECEIVE SWEEP INDICATOR 3-34 AUTO-TEST DEFAULTS The 806A Auto-Test capability goes beyond performing a sequence of tests automatically. Auto-Test control setting defaults eliminate the burden of setting up controls so as to produce consistent results. Receive control defaults are deployed when an auto-test sweep sequence is detected. Send control defaults are deployed when a sweep is started. A different set of parameters are deployed for each of the LEVEL FILTERS (15 kHz, 200 kHz, 500 kHz). The defaults are field programmable and come from the factory programmed (=) as follows: 3-31 SENDING / PRINTING A REPORT - F1 + F2 Press and hold (about 1 sec) F1 and F2 simultaneously to send a report of the latest auto-test results to the serial port on the rear of the unit. The port is configured for 9600 baud ASCII, even parity, 7 data bits and 1 stop bit. The receiving device (terminal or printer) must be configured to insert line feed characters at carriage returns. AUTO-TEST DEFAULTS RECEIVE VF SWEEP RCV FILTER Set to 15 kHz RCV FILTER = 15 kHz VF SWEEP / 204-3604 Hz RCV IMPEDANCE = 600 SND IMPEDANCE = 600 SND LEVEL = 0.0 dBm RECEIVE DSL SWEEP RCV FILTER Set to 200 kHz RCV FILTER = 200 kHz DSL SWEEP / 1-50 kHz RCV IMPEDANCE = 135 SND IMPEDANCE = 135 SND LEVEL = +7.0 dBm RECEIVE HDSL SWEEP RCV FILTER Set to 500 kHz RCV FILTER = 500 kHz HDSL SWEEP / 1-240 kHz RCV IMPEDANCE = 100 SND IMPEDANCE = 100 SND LEVEL = +7.0 dBm 3-32 DISPLAYING AUTO-TEST RESULTS - F3 + F4 Press and hold (about 1 sec) F3 and F4 simultaneously to display the latest auto-test results on the front panel. Panel leds begin blinking when the first data point appears on the displays to caution that recorded data is being displayed. Use the UP and DOWN CURSOR to scroll through all of the frequency steps and note that associated level or delay data points are on the left display. Press and hold F3 and F4 to return to measurement mode. 3-33 POWER-UP DEFAULTS - LEVEL MODE F2 + F4 Power-up defaults are provided to enable the operator to tailor initial control settings for best productivity. Factory power-up defaults settings are: RCV IMPEDANCE = 600 SND IMPEDANCE = 600 RCV TERM/BRDG = TERM SND ON/QUIET = ON RCV FILTER = 15 kHz SND LEVEL = 0.0 dBm SND FREQ. = 1.004 kHz To change the power-up defaults, go to LEVEL measurement mode and adjust the controls to the new defaults. Press and hold (about 1 sec) F2 and F4 simultaneously until the panel leds blink once. 3-35 VF AUTO-TEST DEFAULTS - F2 + F3 Go to LEVEL Mode / 15 kHz Filter and press and hold (about 1 sec) F2 and F3 simultaneously to set the current RCV/SND Impedance and SND Level to the auto-test defaults. 3-36 DSL AUTO-TEST DEFAULTS - F2 + F3 Go to LEVEL Mode / 200 kHz Filter and press and hold (about 1 sec) F2 and F3 simultaneously to set the current RCV/SND Impedance and SND Level to the auto-test defaults. 3-37 HDSL AUTO-TEST DEFAULTS - F2 + F3 Go to LEVEL Mode / 500 kHz Filter and press and hold (about 3-7 Model 806A / 806AR FRONT PANEL OPERATION 1 sec) F2 and F4 simultaneously to set the current RCV/SND Impedance and SND Level to the auto-test defaults. 3-38 RUNNING AUTO-TEST - SENDING 806A 1. Power ON and connect the line to the B / SEND Jack. 2. Set measurement to LEVEL and select the FILTER: 15 kHz - to send the VF Sequence 200 kHz - to send the DSL Sequence 500 kHz - to send the HDSL Sequence 3. Press the Sweep START Control. (The process will take about 2.5 Minutes.) 3-39 RUNNING AUTO-TEST- RECEIVING 806A 1. Power ON and connect the line to the A / RCV Jack. 2. Have the sending set start the SWEEP. Observe the RCV Frequency and note that the SWEEP led is blinking. 3. Test results are available in about 2.5 minutes, after the SWEEP led stops blinking. To display the results, press and hold the F3 + F4 until panel leds blink. Use the UP/DOWN Cursor to scroll. (See 3-32) 3-40 LED TEST F1 +F3 (Lamp Test) Press and hold (about 1 sec) F1 and F3 simultaneously to test the status of the front panel Leds. 3-8 Section 3 Model 806A / 806AR PC OPERATION 9 Pin D MALE 1 - DCD 2 - RD 3 - TD 4 - DTR 806A - 5 - SG 6 - DSR 7 - RTS 8 - CTS 9 - RI 4-1 INTRODUCTION - PC OPERATION This section deals with operating the 806A using a Personal Computer (PC). For ease of comparison, topic titles and numbering has been arranged to correspond to the comparable topics in Section 3 (FRONT PANEL OPERATION). Operation using the front panel controls is usually more convenient for making quick checks. However, there are advantages to using a PC. First, PC control permits both send and receive parameters to be displayed simultaneously. Second, an 806A can be remotely controlled via dial-up modems. Third, two 806A's (both ends of a circuit) can be controlled simultaneously from a single PC screen by one person. Fourth, "auto-test" data can be saved as computer files / reports. Fifth, adding a printer permits text and graphical printouts. (Front panel operation is limited to printing text reports. See 3-31.) - DCD TD RD DSR SG DTR CTS RTS RI 4-1C START-UP Prior to starting note that Convex TIMS.EXE Software is installed on the PC per Section 220. Connect the 806A per 4-1A or 4-1B and turn on the 806A power switch. Launch TIMS.EXE from DOS or a Windows Desktop and the COMMUNICATION SETUP MENU will appear. COMMUNICATION SETUP MENU -> STANDALONE DOUBLE TEST 4-1A HOOK-UP 806A / PC Connect the PC/REMOTE CONTROL Port on the 806A to the PC. The PC/REMOTE CONTROL port is located on the rear or side panel of the 806A. It's an RS-232, serial data port with DCE "polarity". It can be connected directly to a serial (DTE) comm Port on the PC with a 9 pin, Male to Female Cable. DCD RD TD DTR SG DSR RTS CTS RI open -------------------------------------------------open 25 Pin D MALE 8 2 3 6 7 20 5 4 22 Figure 4-1B 806A - MODEM CABLE Note: Front panel switches are not operable while the unit is being remotely controlled by a PC. The PC/232 CONTROL led on the front panel is lit when the PC has control. 9 Pin D MALE 1 2 3 4 806A - 5 6 7 8 9 - Section 4 SYSTEM COMMUNICATION PORT: DIRECT -> com1 com2 BAUD RATE: 1200 2400 4800 9600 -> 19200 9 Pin D FEMALE 1 2 3 4 5 - PC 6 7 8 9 <|> <|>: Position cursor : Toggle DIRECT/MODEM : Select, : Finished : DOS Figure 4-1C Communication Setup Screen (PC with 2 Serial Ports ) STANDALONE Select when using a Single Test Set DOUBLE TEST Select when controlling two Test Sets DIRECT com1 Select DIRECT for 806A to PC hookup com2 Select MODEM when modems are used BAUD RATE Select 19200 for DIRECT 806A to PC connection, otherwise, select a rate suitable for the modems interposed between the PC and the 806A. From the Communications Setup Screen, press the END Key to cause the PC to attempt to communicate with the 806A. If the 806A is not connected or unable to respond, the PC screen will indicate that it is "UNABLE TO COMMUNICATE WITH TEST SET". When the Test Set responds, the MEASUREMENTS Screen will appear per Figure 4-1C1 below. v2.03 is the Version of the TIMS.EXE Software. v2.04 is the Version of the 806A Firmware, and SN 159 its Serial Number. Figure 4-1A 806A - PC CABLE 4-1B MODEM HOOKUP Connect the PC/REMOTE CONTROL Port on the 806A to the Modem. The PC/REMOTE CONTROL Port is located on the rear or side panel of the 806A. It's an RS-232, serial data port with DCE "polarity". Therefore, it requires a "Null Terminal" / 9 to 25 pin conversion to interface with the modem. 4-1 Model 806A / 806AR PC OPERATION =================================d:com1== v2.07 806A WIDE BAND TTS v3.02 SN:625 LEV/FREQ TRANS MEASUREMENTS NOISE DELAY BATT CHK 1. Power ON and connect the B / SND Jack to the A / RCV Jack. 2. Press the SWEEP Control (Function Key F1). That's all it takes - test results are available in about 2.5 minutes. Observe the frequency displays and note that "RCV SWEEP" is indicated just below the receive frequency readout. REMOD DIAL CURSOR OVER SELECTION & MENU 3. When the test is complete a report will appear on the screen (Fig. 4-1E). Enter the Circuit ID number, then press F3 (SAVE) and enter an 8 character "PC" file name. Press F3 a second time to store the report. Figure 4-1C1 Measurement Selection Screen LEV/FREQ Level /Freq., Attenuation Distortion, Loss NOISE Noise, S/N Ratio, Noise w Tone, Noise to Gnd P/AR Peak / Average Ratio RTN LOSS Return Loss BATT CHK Battery Volts Check for Portable Units DIAL 2 Wire Pulse Dialing TRANS Transients (Impulse Noise) 4. Select F4 (PRINT) to print a report or graph on a printer connected to the PC. Select F6 (GRAF) to view or print graphs, or select F7 (MEAS) to return to measurement mode. 6/26/11 09:23 AM kHz dBm uSec kHz dBm uSec .204 -10.1 ---2.004 -10.1 ---.304 -10.1 ---2.204 -10.1 ---.404 -10.1 ---2.404 -10.1 ---.504 -10.1 ---2.604 -10.1 ---.604 -10.1 ---2.804 -10.1 ---.804 -10.2 ---3.004 -10.1 ---1.004 -10.1 ---3.204 -10.1 ---1.204 -10.1 ---3.304 -10.2 ---1.404 -10.1 ---3.404 -10.1 ---1.604 -10.1 ---3.504 -10.1 ---1.804 -10.1 0 3.604 -10.1 ---RCV Z: 600 NOISE: < 10 dBrnD CKT: "Circuit ID / 27 characters" SAVE PRINT GRAF MEAS Select LEV/FREQ Level and Frequency to display: ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz [ Section 4 ] RCV A + 0.0 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU Figure 4-1C2 Level / Frequency Screen Explanation of the Level Screen from the top line down: 1 Measurement (LEV/FREQ), Date, Time 3 Filters: 15 kHz, [ ] (60 Hz OFF) 5 A: RCV Level, Impedance, Term/Hold, Frequency 6 NORM => RCV on A / SEND on B 7 B: SND Level, Impedance, Term/Hold, Frequency 8 SWEEP ... MENU: F1-F8 Function Key assignments Figure 4-1E VF LEVEL AUTO-TEST REPORT 4-2 BATTERY CHECK (Portable units only) The 806A can be left plugged into the AC power source with no adverse effects. It is advisable to power the 806A from the AC mains if the operator can't see the battery status led. If AC is inconvenient, a remote operator should check battery status hourly. Select BATT CHK (Battery Check) from the Measurement Menu. Full charge is about 7 volts - RECHARGE AT OR ABOVE 5.5 VOLTS. On A: RCV Level is +0.0 dBm600 / Freq 1.004 kHz On B: SEND Level is -10.0 dBm600 / Freq 1.000 kHz F2 to F5 provide a quick means to set send frequency. 4-1D CURSOR OPERATION Controls are changed by using the LEFT / RIGHT Arrow Keys to move the BLOCK CURSOR over the desired parameter - then using the UP / DOWN Arrow Keys to change the setting.! THIS TECHNIQUE PROVIDES AGILE CONTROL WITHOUT USING A MOUSE ================================d:com1== BATT CHK 6.9 VDC 6-20 14:09 15 kHz [ ] RCV A -10.0 dBm 600 TERM 1.004 kHz NORM 4W SND B + 0.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU 4-1E AUTO-TEST DEMONSTRATION Although the 806A has lots of capability and flexibility, the smart autotest feature makes it a breeze to operate. This process automatically measures (and stores) LOSS, ATTENUATION DISTORTION and background NOISE. Figure 4-2 Battery Check Screen 4-2 Model 806A / 806AR PC OPERATION Extended operation on low charge will ultimately trigger low battery shutdown to prevent degraded operation and battery damage. Section 4 4-7 LINE HOLD Receive line hold is enabled when the line is terminated. The receive line is put into bridge (BRDG) to release hold (BRDG replaces TERM on RCV Line). [Use REV (Reverse) to release line hold of the send pair.] Use BRDG Mode to (dial) establish a circuit, then switch to TERM to hold and terminate the circuit while testing. 4-3 LOW BATTERY SHUTDOWN Low battery shutdown occurs when the 806A is operated below 5.5 volts, or if the battery was disconnected or replaced. When shutdown occurs the front panel goes dark even though the power switch is on. Connect the power cord to the AC mains to charge and/or operate. The BATT indicator has a slow, 1 second, blink while charging and turns off when the battery is charged. 4-8 I/O REVERSE Use the I/O Reverse when testing a dial line in both directions to facilitate send / receive change-over while maintaining line hold. The A/B REVERSE Selector toggles between NORM and REV modes where: NORM: Receive on A Jack - Send on B Jack REV: Receive on B Jack - Send on A Jack 4-4 I/O CONNECTIONS - PORTABLE UNIT Bantam Jacks located on the lower left corner of the panel provide connections for measurement signals. A is the NORMAL receive jack and B is the NORMAL send jack. C is wired in parallel with A and provides a means to connect a butt set to dial/talk on the A pair. D is wired in parallel with B and provides a means to connect to the B pair. Line hold is automatic. The receive pair is put into bridge (BRDG) to release hold, the send pair is put into DIAL to release hold. ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz [ ] RCV B + 0.0 dBm 600 BRDG 1.004 kHz REV 4W SND A -10.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU 4-5 I/O CONNECTIONS - RACK MOUNT UNIT Measurement signal pairs for the 806AR are normally wired to a computer controlled Metallic Test Access Unit (MTAU) or a manual test panel. Connect the measurement signal wires to the terminal block located on the rear. The receive pair is wired to the A T/R (Tip/Ring) contacts. The send pair is wired to the B T/R contacts. Figure 4-8 NORM / REVerse Selector 4-9 I/O IMPEDANCE Use 600 (or 900) Ohms for voice frequency data or POTS. Use 100 (or 135) Ohms for ISDN, HDSL or other wideband services. The 806A automatically sets the SEND and RCV Impedances to default values when sending or receiving an auto-test tone sequence. Factory defaults are 600 Ohms for VF, 135 Ohms for ISDN / DSL, and 100 Ohms for HDSL tone sequences. To change receive impedance, move the block cursor over the "600" just to the right of "dBm" on the RCV Line. Send Impedance is controlled similarly. Be aware that impedance selection performs two functions: 1. The selected terminator is switched. 2. The corresponding impedance factor is applied. 4-6 RECEIVE BRIDGE / TERM Put the 806A into bridge mode to measure across an "external" termination such as the input of a line card. The BRDG / TERM Selector on the RCV line toggles the receiver between the selected termination impedance (100, 135, 600 or 900 ohms) and high impedance bridging. ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz [ ] RCV A + 0.0 dBm 600 BRDG 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU 4-10 RCV / SND SELECTION Receive / Send selection does not apply when operating the 806A from a PC since both receive and send settings are displayed simultaneously. 4-11 UNITS SELECTION The function of the UNITS Selection (dBm on the RCV line) is dependent on the measurement mode: MODE SELECTIONS LEVEL RCV Line dBm / => TLP OFF RCV Line dBm / TLP => TLP ON NOISE NOISE Line: Choose dBm / dBrn RCV Line dBm / => TLP OFF RCV Line dBm / TLP => TLP ON Figure 4-6 BRDG / TERM Selector Use the left / right arrow keys to move the Block Cursor over TERM and up / down arrow keys to toggle between TERM / BRDG. TERM also HOLDS a dial line (OFFHOOK). BRDG releases HOLD (ON HOOK) In bridge mode, set the receive impedance to match the external termination in order for the measuring set to apply the proper impedance factor. 4-3 Model 806A / 806AR PC OPERATION ================================d:com1== NOISE 80.0 dBrn 6-20 14:09 C MSG [ ] [ ] RCV A -10.0 dBm 600 TERM 1.004 kHz REV 4W TLP +10 dB SND B + 0.0 dBm 600 TERM 1.004 kHz 1004 40k MENU SLOPE (See 1-4 to 1-8 ). Select LEVEL for units on both ends of the circuit. Press the SWEEP/ F1 Key (or SWEEP START/STOP Control) on the SEND Unit to launch SWEEP frequencies. (See 4-13 regarding VF, DSL, HDSL sweep selection.) LOSS is the dB reduction in transmission power observed at the receive end relative to the power applied to the send end. The send end, typically, transmits 0 dBm at 1004 Hz. The receive end measures Level. Loss = SND dBm - RCV dBm Figure 4-11 UNITS SELECTION Screen Move the block cursor over the "dBm" on the RCV Line to assert the TLP offset. Figure 4-11 shows the 806A with the send connected to the receive and the TLP asserted. The actual receive level equals the generator level, 0.0 dBm. However RCV Level is displayed as -10.0 dBm and NOISE is displayed as 80.0 dBrn because both are referenced to a +10 dB TLP. (See 1-15 regarding TLP) Move the block cursor over the "dBrn" on the NOISE Line to display the noise reading in dBm. (See 15 and 1-11 ) ATTENUATION DISTORTION is the dB change in received power relative to the power of a reference frequency (normally 1004 Hz). The send end transmits a group of frequencies including the reference. The receive end records the level associated with each frequency. ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz ] Figure 4-12A Level / Freq. Measurement Screen LINE 1: Measurement Mode (LEV/FREQ) Date, Time. LINE 3: RCV Bandwidth (15 kHz), 60 Hz Reject Filter LINE 5: RCV A Receiving on Jack A - Measuring Level and Frequency, RCV (600) and Bridge / TERM LINE 6: Jack Selector: NORM = Receive on A / Send on B REV = Receive on B / Send on A LINE 7: SND B Send on Jack B - Generator Level and Frequency, dBm/OFF, and Send Impedance controls LINE 8: Current "function" of Function Keys F1 to F8 F1 - SWEEP / STOP Press to start or stop sweep. F2 to F5 Generator "quick" frequency selections F6 - CONT / SKIP generator skip of 2450-2700 Hz F7 - DATA brings up data from the last auto-test F8 -MENU steps back to MEASUREMENTS Menu In NOISE Mode, use the cursor to select between dBm and dBrn. Select dBrn for measuring per the North American / Bell Standards. Use dBm for measuring noise per ITU-T / CCITT (European) Recommendations or to assert the rms detector for level measurements. To change dBm to dBrn use the up/down keys with the block cursor over the "dBm" on the NOISE line. 4-12 LEVEL / DELAY MEASUREMENT SELECTION This section discusses LEVEL, DELAY, and REMOD which is the measurement controlled with the LEVEL / DELAY Switch on the 806A front panel. The Measurement Selection Screen defaults to Level Mode. Move the block cursor over the desired selection and press the ENTER Key. LOSS, ATTENUATION DISTORTION - AUTO-TEST To avoid manually recording data, use PC Control at the Receive End and put the 806A in LEV/FREQ mode. The 806A on the Send end can be controlled from the front panel or a PC. ================================d:com1== v2.07 806A WIDE BAND TTS v3.02 SN:625 MEASUREMENTS NOISE DELAY BATT CHK [ RCV A + 0.0 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU In LEVEL Mode, cursor over dBm on the RCV line to refer the Receive Level reading to a non-zero Transmission Level Point. (TLP appears under the RCV dBm when active.) With the TLP field active, use the cursor to adjust the TLP to a non-zero offset. To remove the TLP, use the up/down keys with the block cursor over the "dBm" on the RCV line. LEV/FREQ TRANS Section 4 REMOD DIAL 1. Receive end 806A - PC Control - LEV/FREQ Mode 2. Send end 806A - Level Mode and Select Filter as follows: 15 kHz VF Sweep / 22 Tones 204 to 3604 Hz 200 kHz DSL Sweep / 22 Tones 1 to 50 kHz 500 kHz HDSL Sweep / 22 Tones 1 to 240 kHz Then press SWEEP- START/STOP (or F1 From a PC) CURSOR OVER SELECTION & MENU Figure 4-12 Measurement Selection MENU 4-12A LEVEL Select LEV/FREQ Mode to measure LEVEL, LOSS, ATTENUATION DISTORTION, or GAIN 4-4 Model 806A / 806AR PC OPERATION 3. The Receive end 806A will automatically switch its receive impedance and filters to adapt to the incoming sequence. After about 2.5 minutes, the receive end PC will display a report. Section 4 FORWARD REFERENCE Mode is used to measure RCV path DELAY. The measuring set sends a fixed frequency (1204 Hz). The REMOD set sends the sweep frequencies (e.g. 204, 304, ... 3504, 3604 Hz) to be measured. On the REMOD set, select the appropriate sequence (normally 15 kHz) and press the START/STOP Control to send SWEEP frequencies to the measuring set. 6/26/11 08:23 AM kHz dBm uSec kHz dBm uSec 1.0 6.9 ---80.0 6.7 ---2.0 6.8 ---90.0 6.8 ---3.0 6.8 ---100.0 6.8 ---4.0 6.8 ---110.0 6.8 ---10.0 6.7 ---120.0 6.7 ---20.0 6.7 ---140.0 6.8 ---30.0 6.7 ---160.0 6.8 ---40.0 6.7 ---180.0 6.8 ---50.0 6.7 ---200.0 6.8 ---60.0 6.7 ---220.0 6.8 ---70.0 6.8 ---240.0 6.7 ---RCV Z: 135 NOISE: < 20 dBrnF CKT: SAVE PRINT GRAF MEAS RETURN REFERENCE Mode is used to measure SEND path DELAY. The measuring set sends the frequencies (e.g. 204, 304, ... 3604 Hz) to be measured. The REMOD set sends a fixed frequency (e.g. 1204 Hz). On the measuring set, select the appropriate sequence (normally 15 kHz) and press the SWEEP (F1) Key to send SWEEP frequencies to the REMOD Unit. "LOCAL" DELAY method is used in 4 wire situations where it is desirable to connect the measuring set to both ends of the circuit or device under test (See 1-35). This mode can be used for bench checking communications equipment such as amplifiers or equalizers, or if the far end of a 4 wire circuit is looped-back. A REMOD set is not required. Select DELAY and press the SWEEP (F1)Key so that the measuring set generator sends SWEEP frequencies back to it's own receiver. Figure 4-12A1 HDSL AUTO-TEST REPORT 4. Enter the Circuit ID Number beside CKT: and press F3 to save as a computer file. The Report will ask for a file name ________.TXT and will store the data in a form convenient for a PC Spreadsheet. For checking equipment: SND is connected to equipment input RCV is connected to equipment output 5. Press F4 to print the report or F6 to view or print a graph. Press F7 to return to Measurement Mode. STRAIGHTAWAY DELAY Straightaway Delay (requires two 806A's) permits measuring delay from end to end on a 2 wire basis which avoids taking an additional circuit out of service. Select DELAY for units on both ends. On the measuring set select STRAIGHTAWAY on the DELAY Screen. The send set can be operated from the front panel controls. Select the appropriate sequence (normally 15 kHz) and press the SWEEP START / STOP to launch the SWEEP sequence. 4-12B DELAY ENVELOPE DELAY DISTORTION (EDD) Measurement is used to determine the relative time differences that various signal frequencies are delayed in transmission. DELAY Readings are derived from the phase of signal modulation that is detected at the receive end. Select DELAY Mode to measure EDD and ATTENUATION DISTORTION simultaneously. Note: An incoming EDD tone sequence will automatically switch the measurement from LEVEL to DELAY. Further, the Level / Delay Filter selection of the SENDING Unit automatically sets the bandwidth filter of the RECEIVING Unit. ================================d:com1== DELAY + 3286 uSEC 6-20 14:09 STRAIGHTAWAY 15 kHz [ ] RCV A -10.1 dBm 600 TERM 1.803 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.804 kHz SWEEP ZERO 1004 1204 1804 CONT DATA MENU FORWARD / RETURN REFERENCE With the exception of a "straightaway" or "loopback technique", delay measurements are unique in that a FORWARD or RETURN REFERENCE signal path is required: FROM or TO the RCV / Measuring set. At the far (Nonmeasuring) end, DELAY "REMODULATION" (REMOD) function is required. Forward or Return Reference methods are used for measuring DELAY on 4 wire circuits (See 1-33 and 1-34). Figure 4-12B DELAY, STRAIGHTAWAY Screen LINE 1: DELAY ( + 3286 uSEC ) Date, and Time. LINE 2: DELAY Mode: ( STRAIGHTAWAY ) LINE 3: RCV Band (15 kHz) and 60 Hz Reject Filter LINE 5: RCV A Receiving on Jack A - Measuring Level and Frequency, Receive Impedance (600) and Bridge / TERM 4-5 Model 806A / 806AR PC OPERATION LINE 6: Jack Select: NORM = Receive on A / Send on B REV = Receive on B / Send on A LINE 7: SND B Sending on Jack B - Generator Level and Frequency, dBm/OFF and Send Impedance controls LINE 8: Current "function" of Function Keys F1 to F8 F1 - SWEEP / STOP Press to start or stop sweep. F2 - ZERO Press to zero reference delay. F3 to F5 Generator "quick" frequency selections F6 - CONT / SKIP generator skip of 2450-2700 Hz F7 - DATA brings up data from the last auto-test F8 - MENU steps back to MEASUREMENTS Menu Section 4 REMOD Select REMOD when measuring Forward or Return Reference EDD. Remodulation Mode is used at the far end of a 4 wire circuit to return the Delay / EDD signal to the measuring unit. (The REMOD unit modulates its send signal with amplitude modulation detected from its receive signal.) In Forward Reference, press the SWEEP (F1) Control so that the REMOD unit sends SWEEP frequencies to the measuring unit. (See 4-13 regarding VF, DSL, HDSL sweep selection.) In Return Reference, set the REMOD unit generator to send a fixed 1204 Hz to the measuring unit. Use PC Control at the Receive End. 1. Receive 806A - PC Control - DELAY, STRAIGHTAWAY Mode 4-13 LEVEL FILTER Selection Filters used for Level are designed to reject noise that is outside of the measurement band of interest for a particular service. The Level Filter Selection determines the receive bandwidth by selecting among the 15 kHz, 200 kHz and 500 kHz Low Pass Filters. 2. Send 806A - DELAY Mode and Select Filter as follows: 15 kHz VF Sweep / 22 Tones 204 to 3604 Hz 200 kHz DSL Sweep / 22 Tones 1 to 50 kHz 500 kHz HDSL Sweep / 22 Tones 1 to 240 kHz Then press SWEEP- START/STOP (or F1 ) Also, use the cursor on the filter line to assert the 60 Hz REJECT Filter when needed. Note: An incoming autotest sequence will automatically select the appropriate filter. 3. The Receive end 806A will automatically switch its receive impedance and filters to adapt to the incoming sequence. After about 2.5 minutes, the receive end PC will display a report. ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz [ ] RCV A + 0.0 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU 6/26/11 09:23 AM kHz dBm uSec 2.004 -10.1 -1 2.204 -10.1 -1 2.404 -10.1 -1 2.604 -10.1 -1 2.804 -10.1 -1 3.004 -10.1 -1 3.204 -10.1 0 3.304 -10.2 -1 3.404 -10.1 -1 3.504 -10.1 0 3.604 -10.1 0 kHz dBm uSec .204 -10.1 -1 .304 -10.1 0 .404 -10.1 1 .504 -10.1 0 .604 -10.1 1 .804 -10.2 -1 1.004 -10.1 -1 1.204 -10.1 0 1.404 -10.1 -1 1.604 -10.1 0 1.804 -10.1 0 RCV Z: 600 NOISE: << 10 dBrnD CKT: "Circuit ID / 27 characters" SAVE PRINT GRAF MEAS Figure 4-13 LEVEL FILTER Selection LINE 3: RCV Bandwidth (15 kHz) and 60 Hz Reject Filter VF - Select 15 kHz for measuring Level, Loss, Attenuation Distortion, and Noise on VF Facilities - or - to cause the generator to launch the VF test tone sequence. DSL - Select 200 kHz for measuring Level, Loss, Attenuation Distortion, and Noise on ISDN/DSL, DDS Facilities - or - to cause the generator to launch the DSL test tone sequence. Figure 4-12B1 VF DELAY AUTO-TEST REPORT 4. Enter the Circuit ID Number beside CKT: and press F3 to save as a computer file. The Report will ask for a file name ________.TXT and will store the data so that it can be brought into a PC Spreadsheet. HDSL - Select 500 kHz for measuring Level, Loss, Attenuation Distortion, and Noise on HDSL Facilities - or - to cause the generator to launch the HDSL test tone sequence. 5. Press F4 to print the report or F6 to view or print a graph. Press F7 to return to Measurement (real-time) Mode. 60 Hz REJECT Filter Assert this (highpass) filter to reject low frequency interference such as ringing or AC mains noise when performing LEVEL measurements. It can be asserted or taken out when using the 15 kHz, 200 kHz, or 500 kHz Filters. The 60 Hz Reject Filter is asserted by using the block cursor on line 3 to change [ ] to "60 Hz NP". 4-6 Model 806A / 806AR PC OPERATION Section 4 ================================d:com1== NOISE 28.1 dBrn 6-20 14:09 S/N RATIO |+ 50.0 dB C MSG NOTCH [ ] RCV A -10.1 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.004 kHz 1004 40k MENU 4-14 NOISE MEASUREMENT SELECTION This section discusses NOISE measurements which are controlled with the NOISE Switch on the 806A front panel. NOISE, like Level is also a power measurement. The difference is that NOISE is interfering power. Countries following ITU-T recommendations express noise in dBm (dB relative to 1 milliwatt), same as level. Countries following the BELL practice use a different power scale for noise vs. level. NOISE is expressed in dBrn (dB relative to 1 picowatt). Figure 4-14 NOISE w TONE - S/N Screen LINE 1: NOISE w TONE ( 28.1 dBrn) Date, and Time. LINE 2: S/N RATIO (|+50.0 dB) greater than 50 dB LINE 3: NOISE FILTER (C MSG), Notch ON (NOTCH) LINE 5: RCV A Receiving on Jack A - Measuring Level and Frequency, RCV Z (600) and Bridge / Term LINE 6: Jack Selector: NORM = Receive on A / Send on B REV = Receive on B / Send on A LINE 7: SND B Send on Jack B - Generator Level and Frequency, dBm/OFF, and Send Impedance controls LINE 8: Current "function" of Function Keys F1 to F8 F3 and F5 Generator "quick" frequency selections F8 - MENU steps back to MEASUREMENTS Menu NOISE power has to be taken in the context of the bandwidth of interest. Consequently NOISE power is "viewed" through "WEIGHTING" Filters that reject power that is not in the spectrum of interest. NOISE is measured at the receive end. Select NOISE (only) to measure background or idle channel noise in dBm or dBrn on the receive pair. The send end provides a quiet termination (generator OFF). NOISE with TONE is measured at the receive end using a NOTCH Filter in addition to the WEIGHTING Filter. The send end provides a 1004 Hz tone which is removed by the Notch Filter at the receive end. Noise with Tone measurement is normally used on PCM facilities to exercise the process (compandors) over a large dynamic range. NOISE TO GND Turn the NOTCH to [ ] (off) and cursor over RCV on Line 5. Use the up/down arrow keys to change RCV A to "TG A" to configure the 806A for "TO GROUND" Measurements. Noise to Ground (longitudinal noise) in dBm600 (or dBrn600) is the power common to the receive pair with respect to facilities ground. SIGNAL/NOISE RATIO is the dB difference between signal and noise power. It is measured the same as NOISE with TONE, the difference is the reading is expressed in dB (Signal dBm - Noise dBm). On the measuring unit, connect the RCV pair to A and connect the B / SEND Ring (Red alligator clip lead) to facilities ground. The send end provides a quiet termination. (See 1-14) NOISE to GROUND measures (longitudinal) noise common to both conductors of the receive pair with respect to facilities ground. The Measurement Selection Screen defaults to Level Mode. Move the block cursor over the desired selection and press the ENTER Key. ================================d:com1== NOISE | 30.0 dBrn 6-20 14:09 E [ ] [ ] TG A | dBm 600 TERM . kHz NORM 4W SND B -10.0 OFF 600 TERM 1.020 kHz 1004 40k MENU The NOISE Screen provides a means to further select "with Tone" or "to Ground" options. (Also select an appropriate noise filter per 4-15 ) Select NOISE + NOTCH to measure Noise with Tone in dBm (or dBrn) and Signal to Noise (Signal to Total Distortion) Ratio in dB on the receive pair The send end provides a 1004 Hz holding tone. Figure 4-14A NOISE to GROUND Screen LINE 1: NOISE (| 30.0 dBrn) Date, and Time. LINE 3: NOISE FILTER (E), [ ] (Notch OFF) LINE 5: TG A Common to Jack A - Measuring Level and Frequency, Receive Impedance forced to 600 LINE 6: Jack Selector: NORM = RCV on A / GND B - Ring REV = RCV on B / GND A - Ring LINE 7: SND B GND ref on Jack B - Generator Level and Frequency is forced OFF since B is used for GND LINE 8: Current "function" of Function Keys F1 to F8 F3 and F5 Generator "quick" frequency selections F8 - MENU steps back to MEASUREMENTS Menu 4-7 Model 806A / 806AR PC OPERATION 4-15 NOISE FILTER Selection Filters are an integral part of Noise Measurements. They have specific spectral weightings that pass only that energy which falls in the transmission band of interest for a particular service. Use the NOISE FILTER Selector to select among the C MSG, 3.4 kHz, D, E and F Filters. The E and F filters are not available for notched-noise measurements: S/N, NOISE W TONE. Section 4 4-18 SEND LEVEL (dBm) SETUP. From any measurement screen send level setting is displayed on line 7 to the right of SND B. Use the LEFT / RIGHT CONTROL CURSOR to select a digit and the UP and DOWN CURSOR to adjust the selected digit. Note: Send Level can be set when the generator is turned on (dBm) or quiet (OFF). ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz [ ] RCV A + 0.0 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 OFF 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU Select the C MSG FILTER (C Message) for VOICE service. The C MSG Filter is used to weight Noise or Impulse Noise as it relates to voice telephone service. C MSG weighting corresponds to listener perceived annoyance when using a telephone set. Select the 3.4 kHz FLAT FILTER for VF DATA / FAX service to detect low frequency interference. The 3.4 kHz Flat Filter replaced the 3 kHz Flat Filter and weights Noise as it relates to VF data or fax transmission. The 3.4 kHz Flat Filter passes frequencies below 300 Hz so as to be useful in detecting low frequency interference such as 20 and 60 Hz. Figure 4-18 GENERATOR QUIET Screen 4-19 QUIET Generator OFF Mode Put the generator in OFF Mode (generator off) to measure background or idle channel NOISE or IMPULSE NOISE. Use the cursor on line 7 to toggle between dBm and OFF (QUIET). Select the D FILTER for VF DATA / FAX service. The D Filter, also known as the "CCITT O.41 Channel Bank Filter", weights Noise as it relates to VF data or fax transmission. The 3 dB bandwidth extends from 300 Hz to 3,400 Hz so as to approximate the transmission spectrum of a 28.8 / V.34 Modem. 4-20 DIAL Send Mode Put the generator in DIAL Mode to control line hold on the B / SND Jack and to dial on the SEND pair. Select DIAL from the MEASUREMENTS MENU. ================================d:com1== DIAL 6-20 14:09 15 kHz [ ] RCV B |-60.0 dBm 600 BRDG . kHz NORM 2W SND B <--- 703 318 8991 PULSE DIAL ON HOOK MENU Select the E FILTER for DSL (IDSN Basic Rate) or DDS (Digital Data System) Service. The E Filter (which replaces the 50 Kilobit Filter) is used to measure Level, or Noise on 2 or 4 Wire circuits used for DSL or DDS Transmission. The 3 dB bandwidth extends from 1 kHz to 50 kHz and approximates filters used in DSL Terminators. Figure 4-20 DIAL Screen Select the F FILTER for HDSL Service. The F Filter is used to measure Level, Noise or Impulse Noise on 2 Wire circuits used for HDSL Transmission. The 3 dB bandwidth extends from 5 kHz to 245 kHz and approximates filters used in HDSL (HTU) Terminal Units. Enter the phone number on line 7 and press the F3 Key (DIAL) to dial on the B pair. Use F2 to select between PULSE and TONE (touch-tone). Use the F4 as the HOOK Switch - OFF HOOK Holds the line - ON HOOK Bridges the line. Go ON HOOK to use a Butt Set. For Portable units, connect the butt set to the D Jack to talk. For Rack Mounted units, connect the butt set to the B Jack. In either case the receive channel is connected to provide Level, Frequency, and audio monitoring. 4-16 START/STOP - GENERATOR SWEEP Use the F1 Key (SWEEP/STOP) to start or stop the generator test tone sequence used in LEVEL Mode: Select the 15 kHz Filter to launch the VF test sequence. Select the 200 kHz Filter to launch the DSL sequence. Select the 500 kHz Filter to launch the HDSL sequence. 4-17 ZERO - IMPULSE COUNT Use the F2 Key (ZERO) to reset the IMPULSE NOISE Counters and TIMER in TRANS Mode. Use the F2 Key (ZERO) to set a zero Delay reference at a particular frequency - normally 1804 Hz - in Delay Mode. 4-8 Model 806A / 806AR PC OPERATION Section 4 4-24 IMPULSE NOISE COUNT RATE SETUP A maximum impulse count rate of 8 or 100 events per second is imposed to avoid registering multiple counts due to ringing associated with an individual event. 8 is for VF services and 100 is for high speed services. In TRANS Mode, use the F5 Key to select between 8 or 100. 4-21 TLP SETUP Transmission Level Point is the design gain in dB at a particular point in the facilities compared to a reference point (0 TLP). When asserted the test set offsets level or noise readings so that power is referred to a 0 TLP. (See 1-15) ================================d:com1== NOISE 80.0 dBrn 6-20 14:09 C MSG [ ] [ ] RCV A -10.0 dBm 600 TERM 1.004 kHz REV 4W TLP +10.0 dB SND B + 0.0 dBm 600 TERM 1.004 kHz 1004 40k MENU 4-25 SEND FREQUENCY SETUP - SND/RCV Mode From any measurement screen send frequency setting is on the far right of line 7. Use the LEFT / RIGHT CONTROL CURSOR to select the digit and the UP and DOWN CURSOR to adjust the selected digit. Send Frequency can be set when the generator is OFF. ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz [ ] RCV A + 0.0 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU Figure 4-21 TLP SELECTION Screen Move the block cursor over the "dBm" on the RCV Line to assert the TLP offset. Figure 4-21 shows the 806A with the send connected to the receive and the TLP asserted. The actual receive level equals the generator level - 0.0 dBm. However RCV Level is displayed as 10.0 dBm and NOISE is displayed as 80.0 dBrn because both are referenced to a +10 dB TLP. Figure 4-25 GENERATOR FREQUENCY Screen 4-22 IMPULSE NOISE THRESHOLD SETUP Impulse threshold is stated in dBrn (or dBm) and calibrated to equal the peaks of a sinewave with steady state power that is 3 dB lower. (The peaks of a -3 dBm sinewave correspond to a 90 dBrn threshold.) Select dBrn or dBm at the far right end of line 2. ================================d:com1== TRANS 0:00:00 IMPULSE 6-20 14:09 0/ 70 0/ 74 0/ 78 dBrn D NOTCH [ ] RCV A -10.1 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.004 kHz ZERO STRT 15 M 8 MENU 4-26 SEND FREQUENCY SETUP - RCV Mode For PC operation this section is covered above in 4-25. 4-27 SWEEP CONTROL / INDICATORS - In LEVEL Mode Press the F1 Key (SWEEP) to start a sweep tone sequence. The F1 Key changes to STOP while the sweep is in process. Also, the send frequency display tracks the current frequency. Press STOP to halt a sweep that is in progress. Select the 15 kHz Filter to launch the VF test sequence. Select the 200 kHz Filter to launch the DSL sequence. Select the 500 kHz Filter to launch the HDSL sequence. Sweep also automatically sets the send level and impedance. See 4-34. "RCV SWEEP" notice appears just below the receive frequency to advise that a sweep tone sequence has been detected by the receive section. The particular sequence will automatically select the associated Filter and Impedance. See 4-34. Figure 4-22 IMPULSE NOISE THRESHOLD Screen The THRESHOLD above which IMPULSE events are tallied is stated in dBrn. In TRANS (Impulse Noise) Mode, move the cursor over the LOW Threshold setting (70 on line 2). Select a digit, then use the up/down arrow key to change the digit. 4-28 SKIP (SF SKIP) Single Frequency Skip is deployed to prevent sending tones near 2600 Hz when testing switched facilities that use in band signaling. In LEVEL Measurement Mode, press the F6 Key (CONT/SKIP) to assert SF SKIP or return to CONT (continuous) sweep. AMPLITUDE DISTRIBUTION of IMPULSE events is measured by providing, three THRESHOLDS above which events are separately tallied. The MID and HIGH Thresholds will track the LOW Threshold by +4 and +8 dB. 4-29 FUNCTION / FREQUENCY KEYS Function / Frequency Keys vary with measurement mode. Level Mode is shown as an example below. 4-23 IMPULSE NOISE TIMER SETUP Impulse Noise is measured by counting the number of peaks that exceed a threshold during a counting interval. The count interval is determined by an adjustable TIMER which may be set for: 5, 15, 30, and 60 minutes or CONT(continuous). In TRANS Mode, use the F4 Key to select among 5 M, 15 M, 30 M, 60 M, or CONT. Impulse events will stop counting after the selected interval has expired. F1 (SWEEP) is used to send a sweep tone sequence determined by the receive filter setting. See 4-27. F2, F3, F4, and F5 are quick frequency keys to set frequencies commonly used in Level Mode. 4-9 Model 806A / 806AR PC OPERATION F3 (1004 Hz) is a common reference frequency for measuring LOSS and serves as a reference for attenuation distortion measurement. F6 (CONT/SKIP) Skip is deployed to prevent sending tones near 2600 Hz when testing switched facilities that use in band signaling. F7 (DATA) is discussed in 4-32 DISPLAYING AUTOTEST RESULTS - F7 F8 (MENU) return to the MEASUREMENT Menu. 4-33 POWER-UP DEFAULTS - LEVEL MODE F10 Power-up defaults are provided to enable the operator to tailor initial control settings for best productivity. Factory power-up defaults settings are: SND IMPEDANCE = 600 SND dBm/OFF = dBm SND LEVEL = 0.0 dBm SND FREQ = 1.004 kHz To change the power-up defaults, go to LEVEL Measurement Mode and adjust the controls to the new defaults. Then press the F10 Function Key. Figure 4-29 FUNCTION / FREQ. KEYS Screen 4-30 CHANGING A FREQUENCY KEY In PC operation frequency keys are changed automatically as a function of the measurement mode. Note that when a quick frequency key is pressed "LAST" appears in place of the quick frequency. LAST refers to the last generator setting before the frequency key was pressed. This arrangement makes it convenient for the operator to check a quick frequency - then return to the "last" used frequency by pressing a quick key. 4-31 PRINTING A REPORT OR GRAPH - F4 From the Level Measurement Screen Press F7 (DATA) to view the latest report. Press F4 (PRINT) to print a report or graph on a printer connected to the PC. Select F6 (GRAF) to view or print graphs. Select F7 (MEAS) to return to measurement mode. 6/26/11 09:23 AM kHz dBm uSec kHz dBm uSec .204 -10.1 ---2.004 -10.1 ---.304 -10.1 ---2.204 -10.1 ---.404 -10.1 ---2.404 -10.1 ---.504 -10.1 ---2.604 -10.1 ---.604 -10.1 ---2.804 -10.1 ---.804 -10.2 ---3.004 -10.1 ---1.004 -10.1 ---3.204 -10.1 ---1.204 -10.1 ---3.304 -10.2 ---1.404 -10.1 ---3.404 -10.1 ---1.604 -10.1 ---3.504 -10.1 ---1.804 -10.1 0 3.604 -10.1 ---RCV Z: 600 NOISE: < 10 dBrnD CKT: "Circuit ID / 27 characters" SAVE PRINT GRAF MEAS Figure 4-31 VF LEVEL AUTO-TEST REPORT 4-32 DISPLAYING AUTO-TEST RESULTS - F7 From the Level Measurement Screen Press F7 (DATA) to view the latest report. Select F6 (GRAF) to view or print graphs. Select F7 (MEAS) to return to measurement mode. RCV IMPEDANCE = 600 RCV TERM/BRDG =TERM RCV FILTER = 15 kHz ================================d:com1== LEV/FREQ 6-20 14:09 15 kHz [ ] RCV A + 0.0 dBm 600 TERM 1.004 kHz NORM 4W SND B -10.0 dBm 600 TERM 1.000 kHz SWEEP 404 1004 2804 40k CONT DATA MENU Section 4 4-34 AUTO-TEST DEFAULTS The 806A Auto-Test capability goes beyond performing a sequence of tests automatically. Auto-Test control setting defaults eliminate the burden of setting up controls so as to produce consistent results. Receive control defaults are deployed when an auto-test sweep sequence is detected. Also the receive will automatically switch from LEVEL to DELAY when an EDD sequence is detected. Send control defaults are deployed when a sweep is started. A different set of parameters are deployed for each of the LEVEL FILTERS (15 kHz, 200 kHz, 500 kHz). The defaults are field programmable and come from the factory programmed (=) as follows: RECEIVE VF SWEEP RCV FILTER -> 15 kHz RCV IMPEDANCE = 600 RCV FILTER 15 kHz VF SWEEP / 204-3604 Hz SND IMPEDANCE = 600 SND LEVEL = 0.0 dBm RECEIVE DSL SWEEP RCV FILTER -> 200 kHz RCV IMPEDANCE = 135 RCV FILTER 200 kHz DSL SWEEP / 1-50 kHz SND IMPEDANCE = 135 SND LEVEL = +7.0 dBm RECEIVE HDSL SWEEP RCV FILTER-> 500 kHz RCV IMPEDANCE = 100 RCV FILTER 500 kHz HDSL SWEEP / 1-240 kHz SND IMPEDANCE = 100 SND LEVEL = +7.0 dBm 4-35 VF AUTO-TEST DEFAULTS - F9 Go to DELAY Mode / 15 kHz Filter and press F9 to set the current RCV/SND Impedance and SND Level to the auto-test defaults. 4-36 DSL AUTO-TEST DEFAULTS - F9 Go to DELAY Mode / 200 kHz Filter and press F9 to set the current RCV/SND Impedance and SND Level to the auto-test defaults. 4-37 HDSL AUTO-TEST DEFAULTS - F9 Go to DELAY Mode / 500 kHz Filter and press F9 to set the current RCV/SND Impedance and SND Level to the auto-test defaults. 4 - 10 Model 806A / 806AR PC OPERATION Section 4 4-38 RUNNING AUTO-TEST - SENDING 806A The sending test set may be operated from the front panel or from a PC. 1. Power ON and connect the line to the B / SEND Jack. 2. Set measurement to LEVEL and select the FILTER: 15 kHz - to send the VF Sequence 200 kHz - to send the DSL Sequence 500 kHz - to send the HDSL Sequence 3. Press the Sweep START Control. (Press F1 (SWEEP) if operating the send unit from a PC.) The process will take about 2.5 Minutes. 4-39 RUNNING AUTO-TEST - RECEIVING 806A The receiving set is operated using a PC. Figure 39A GRAPH Attenuation Distortion Screen 1. Power ON and connect the line to the A / RCV Jack. 2. Have the sending set start the SWEEP. Observe the RCV Frequency and note that the RCV SWEEP indicator appears just below the receive frequency display. 3. Test results are available in about 2.5 minutes, after the RCV SWEEP indication has disappeared. Results will be display automatically when the auto-test is complete. 4-40 COMMUNICATION PARAMETERS: a. Serial Asynchronous b. Full Duplex c. 7 bit ASCII d. Even Parity e. Baud Rates 1200, 2400, 4800, 9600, 19200 bps f. Interface: (9 pin) RS-232C 4-41 COMMUNICATIONS PROTOCOL: a. Host computer will transmit a Command Request Block. 6/26/96 09:23 AM kHz dBm uSec 2.004 -10.1 ---2.204 -10.1 ---2.404 -10.1 ---2.604 -10.1 ---2.804 -10.1 ---3.004 -10.1 ---3.204 -10.1 ---3.304 -10.2 ---3.404 -10.1 ---3.504 -10.1 ---3.604 -10.1 ---- kHz dBm uSec .204 -10.1 ---.304 -10.1 ---.404 -10.1 ---.504 -10.1 ---.604 -10.1 ---.804 -10.2 ---1.004 -10.1 ---1.204 -10.1 ---1.404 -10.1 ---1.604 -10.1 ---1.804 -10.1 0 RCV Z: 600 NOISE: < 10 dBrnD CKT: "Circuit ID / 27 characters" SAVE PRINT GRAF MEAS b. Test set will answer by sending a Response Block, an Acknowledgment Block, or a Non-acknowledgment Block. c. Test set must respond to Host within a set time period (e.g. 1 sec) after which the Host will retransmit two more times before suspending communications and logging an error. d. No auto echo on test set. 806ACMD Document provides a complete list of commands, responses, examples. Figure 4-39 VF AUTO-TEST REPORT 4. Select F4 (PRINT) to print a report or graph on a printer connected to the PC. Select F6 (GRAF) to view or print graphs, or select F7 (MEAS) to return to measurement mode. 4 - 11