Transcript
NOTE TO PROJECT ARCHITECT: LAUSD INFORMATION TECHNOLOGY DIVISION IS THE ONLY COGNIZANT AUTHORITY FOR CHANGES OR MODIFICATION OF THIS SPECIFICATION. NO CHANGES OR MODIFICATION SHALL BE MADE WITHOUT SPECIFIC WRITTEN AUTHORIZATION OF ITD. NOTE TO PROJECT ARCHITECT: DESIGN SHALL BE BASED ON ONE OF THE OPTIONS DESCRIBED UNDER SECTION 1.5. OPTION 1: RECEPTION OF OVER THE AIR ATSC DIGITAL TELEVISION SIGNALS WITH CONVERSION TO NTSC SIGNALS FOR DISTRIBUTION. THIS OPTION SHALL BE USED IN INSTANCES WHERE THERE IS A PREVIOUSLY DEPLOYED BASE OF NTSC TELEVISIONS NOT CAPABLE OF RECEIVING ATSC DTV SIGNALS. OPTION 2: RECEPTION AND DISTRIBUTION OF OTA ATSC/QAM DIGITAL TELEVISION SIGNALS IN THE ATSC QAM FORMAT. THIS OPTION IS FOR NEW SCHOOLS USING COAXIAL DISTRIBUTION. SECTION 25850 TELEVISION SYSTEM – COAXIAL DISTRIBUTION
NOTE TO PROJECT ARCHITECT: USE THIS SPECIFICATION SECTION 25852 FOR MODIFICATIONS OR ADDITIONS TO CABLE PLANT FACILITIES WITH A COAXIAL DISTRIBUTION, NEW EARLY EDUCATION CENTERS, AND FOR NEW ELEMENTARY SCHOOLS WITH A BACKBONE DISTRIBUTION LENGTH NOT EXCEEDING X FEET. USE SPECIFICATION SECTION 25852-FIBER OPTIC DISTRIBUTION FOR ADDITIONS OR MODIFICATIONS TO FACILITIES WITH A FIBER OPTIC DISTRIBUTION SYSTEM, FOR NEW ELEMENTARY SCHOOLS WITH A BACKBONE INFRASTRUCTURE EXCEEDING X FEET, AND FOR NEW MIDDLE AND HIGH SCHOOL CAMPUSES.
PART 1 1.01
GENERAL
SUMMARY A.
Provisions of Division 01 apply to this section.
B.
Principal items of Work in this Section include, but are not limited, to: 1.
C.
Provide and install a complete and operating Head-End/RF Distribution System as specified and indicated, including all required amplifiers, couplers, outlet devices, cables, connectors, and all other materials.
Related Sections:
PROJECT NAME SCHOOL NAME
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D.
1.
Section 16010: Basic Electrical Requirements
2.
Section 16050: Basic Electric Materials
3.
Section 16060: Grounding and Bonding
4.
Section 16120: Low Voltage Wiring
5.
Section 16130: Raceways and Boxes Fittings and Supports
6.
Section 16470: Panelboards and Signal Terminal Cabinets
7.
Section 25568: Premise Wiring
8.
Section 25569: Premise Wiring
9.
Section 25852: Television System - Fiber Optic Distribution
Acronyms: AGC Automatic Gain Control ANSI American National Standards Institute ASTM American Society for Testing and Materials ATSC BICSI CATV CCTV CW FEC FCC IEEE IOR ITD MATV MPEG NEMA NTSC OAR OTA RMDA QAM QTHF QTRC
PROJECT NAME SCHOOL NAME
Advanced Television Systems Committee Building Industry Consulting Services International Cable Television Closed Circuit Television Continuous Wave Forward Error Correction Federal Communications Commission Institute of Electrical and Electronics Engineers Inspector of Record Information Technology Division Master Antenna Television Moving Pictures Experts Group National Electrical Manufacturers Association National Television System Committee Owner Authorized Representative Over the Air Rack –Mount Distribution Amplifier Quadrature Amplitude Modulation QT Head-End Fan QAM Transcoder Rack Chassis 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-2
UL UHF
1.02
VHF
Underwriter’s Laboratory, Inc. Ultra High Frequency Very High Frequency
VSB
Vestigial Sideband
SYSTEM REQUIREMENTS A.
1.03
See System Description (paragraph 1.05).
SUBMITTALS A.
Provide the following submittals in accordance with Division 01: 1.
Furnish catalog cuts, technical data, and descriptive literature on components. Data shall be clearly marked and noted to identify specific ranges, model numbers, sizes, and other pertinent data.
2.
Each submittal shall be bound and shall contain an index organized vertically by assembly and item number and horizontally by columns.
3.
a.
The first submittal shall be the major head end equipment.
b.
The leftmost column shall be the item number; next shall be the description, followed by the applicable specification section number, and followed by the specified item, which is followed by the submitted item.
c.
The rightmost column shall be for notes, which shall be used to reference the reason for submitting items other than as specified.
Each submittal shall contain product data sheets or catalog cut sheets for each item listed in the Index. These shall be arranged in the same order as the Index and if more than one item is shown, the submitted items shall be highlighted or marked with an arrow. a.
4.
Provide Shop Drawings, in the same size as the Record Drawings. Shop Drawings shall be prepared in latest version of AutoCAD with 3 CD-ROM electronic copies submitted along with full sized Shop Drawings. a.
PROJECT NAME SCHOOL NAME
The product data shall be sufficiently detailed to allow the Architect to evaluate the suitability of the product and to allow other trades to provide necessary coordination.
Provide a complete set of scaled drawings of racks, consoles, and cabinets with designations, dimensions, color, operating controls, instrument wiring, and schematic diagrams of circuits, following Drawings as baseline. 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-3
b.
Shop Drawings shall provide details as to interfaces of equipment of other Work, identifying numbers of wires, termination requirements, voltages, and other pertinent details. Include front elevations, cabinet dimensions, types of mounting, doors, barriers, catalog number of locks, and finishes for terminal cabinets.
c.
Include a dimensional Shop Drawing of console nameplate. Nameplate shall contain school name, firm, address and telephone number for warrantee, maintenance, and power load.
d.
For Signal Terminal Cabinets: Include a front elevation indicating cabinet dimensions, make, location and capacity of equipment, size of gutters, type of mounting, finish, and catalog number of locks. General layout of internal devices, wiring drawings with wire numbers and device connections, cut sheets of devices in enclosure, and bill of materials listing description, manufacturer, part number, and quantity of items shall be included.
e.
Shop Drawings shall indicate equipment locations, wiring and schematics, details, panel configurations, sizes and a point-to-point wiring diagram of all circuits. Shop Drawings shall indicate interfaces to equipment furnished by others, identifying numbers of wires, termination requirements, and other pertinent details. Responsibility for each end of interfaces shall be noted on Shop Drawings.
f.
Submit Drawings prepared, signed, and sealed by structural engineer licensed in the State of California. Details shall be provided indicating the proposed means of support and attachment of all wall and floor mounted racks. Calculations shall be based on the maximum load rating of the cabinet by the manufacturer in a Zone 4 seismic environment, not the weight at time of occupancy.
5.
Contractor shall have completed at least 5 projects of equal scope to systems described herein and shall have been in the business of supplying and installing specified type of systems for at least 5 years.
6.
Contractor shall provide written assurance that a spare set of all major parts for the system installed is in stock at all times.
7.
Contractor shall include in the Material List Submission copies of the manufacturers’ certifications that the Contractor is an authorized distributor and service provider of the submitted manufacturers’ products and Contractor’s staff has been adequately trained and certified in the installation of those products.
8.
Contractor shall provide a letter from the Manufacturer warranting the availability of spare parts common to proposed system for a period no less than
PROJECT NAME SCHOOL NAME
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5 years on all components. The Contractor shall also provide the lead time in days and hours for receiving these spares. 9.
1.04
Samples: Contractor shall provide Samples of material and equipment as required by the Architect. If Samples are requested, they shall be submitted within 10 days from date of request.
CODES AND STANDARDS A.
1.05
Complete installation shall meet or exceed the latest edition of following standards: 1.
EIA/TIA-568: Commercial building telecommunications wiring standard.
2.
EIA/TIA-569: Commercial pathways and spaces.
3.
EIA/TIA-606: Administration standard for telecommunications infrastructure of commercial buildings.
4.
EIA/TIA-607: Commercial building grounding and bonding requirements for telecommunications.
5.
CCR Part 2 - California Building Code (CBC).
6.
CCR Part 3 - California Electrical Code (CEC).
7.
ANSI, ASTM, UL, NEMA, IEEE and FCC standards as applicable.
8.
BICSI Telecommunications Distribution Methods Manual, current edition.
9.
FCC Regulations Part 68 and 76.
building
standard
for
telecommunications
SYSTEM DESCRIPTION A.
The television head end and the cable RF distribution system shall conform to the highest present state of the art in the field of RF television transmission.
NOTE TO PROJECT ARCHITECT: THE DESIGN SHALL CONFORM TO ONE OF THE APPLICABLE OPTIONS DESCRIBED BELOW. EDIT THIS SECTION TO REFLECT ONE OPTION ONLY. 1.
Provide reception of over the air ATSC digital television signals with conversion to NTSC signals for distribution.
THE PREVIOUS OPTION SHALL BE USED IN INSTANCES WHERE THERE IS A DEPLOYED BASE OF NTSC TELEVISIONS NOT CAPABLE OF RECEIVING ATSC DTV SIGNALS. PROJECT NAME SCHOOL NAME
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-5
OR 1.
Provide reception and distribution of OTA ATSC/QAM digital television signals in ATSC/QAM format.
B.
Provide a CATV connection if OTA Antennas are unable to receive adequate signal even after the application of pre-amplifiers and RMDA amplifiers.
C.
AQD demodulators shall be QAM compatible and shall be used to convert to NTSC transmissions if cable is used.
D.
The completed systems are required to pass proof-of-performance tests as described and specified.
E.
Television reception, processing, amplification, and distribution system shall provide the following functions: 1.
Where MATV head-end is required: a.
Receive, process, convert to VHF/UHF, and amplify the ten local area UHF/VHF digital channels: 60 (43) to 2, 36 to 4, 31 to 5, 53 (7) to 7, 43 (9) to 9, 65 to 11, 66 to 13, 59 to 28, 35 to 34, and 41 to 10 per SD 4.6. Note that frequency reassignments may occur, requiring that the installation be adjusted to accept the new channel assignments. Channels shown in parenthesis are the new channel assignments tentatively planned to occur on February 19, 2009.
2.
The system shall be designed to provide amplification and distribution in the frequency range of 40 to 860 MHz in the forward direction.
3.
All passive distribution equipment, components, connectors, and cables installed after the headend amplifier shall pass all frequencies from 5 to 900 MHz.
4.
Systems shall be capable of delivering all NTSC or ATSC color and monochrome signals to NTSC/ATSC compatible digital or analog EIA television receivers.
5.
The minimum level of the video carrier signal on any channel shall be +6dBmv at the tap.
6.
The video carrier level of the weakest channel shall be greater than or equal to +10dBmv at the input to a distribution amplifier. Furnish distribution amplifiers as required to provide this result.
F.
PROJECT NAME SCHOOL NAME
Performance:
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-6
1.
1.06
All television systems shall meet or exceed the following performance parameters to insure total compatibility with CATV systems and for future developments in modes of RF transmission. a.
5-900 MHz passive devices.
b.
54-860 MHz forward direction active devices.
c.
30-54 MHz frequency spectrum reserved for couplers, filters, and networks for forward and reverse RF transmission. Isolation between the forward and reverse spectrum shall be 50 dB.
2.
Cross modulation, minimum 57 dB for CATV and 46 for MATV system for all active devices.
3.
Carrier to noise 45 dB minimum for the total in school system.
4.
Shielding, all system components must meet or exceed - 80db.
5.
There shall not be more than 10db difference between the highest and lowest channel anywhere in the system.
6.
Visual to aural carrier ratio, minus 15 dB minimum.
7.
The minimum level of the video carrier signal on any channel shall be +6dBmv and the maximum level shall be +15dBmv measured at the tap at any tap in the system.
8.
The video carrier level of the weakest channel shall be greater than or equal to +10dBmv at the input to a distribution amplifier. Furnish distribution amplifiers as required to provide this result.
9.
No amplifier shall be adjusted to a gain setting higher than +44 dB for digital signal applications.
QUALITY ASSURANCE A.
Work shall conform to California Electrical Code.
B.
Work shall conform to CCR, Title 24 Part 3, Basic Electrical Regulation and National Electrical Code, latest edition.
C.
Only a qualified Contractor holding licenses required by legally constituted authorities having jurisdiction over the work, shall do the work.
D.
Persons skilled in trade represented by work, and in accordance with all applicable building codes, shall install system in accordance with best trade practice.
PROJECT NAME SCHOOL NAME
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-7
E.
Work shall be performed by a Contractor that has completed at least 5 school systems of equal scope to system described herein and shall have been engaged in business of supplying and installing specified type of systems for at least 5 years. Contractor shall maintain a fully equipped service organization capable of furnishing repair service to equipment.
F.
System startup and testing shall be performed by the Contractor under the direct observation of the Engineer of Record, Owner’s Authorized Representative, Inspector of Record, or the Owner’s designated representative.
G.
The Contractor shall use adequate numbers of skilled personnel who are manufacturer certified, thoroughly trained and experienced on the necessary crafts, and completely familiar with the specified requirements and methods needed for the proper performance of the work.
H.
Contractor shall coordinate pathways, cable runs and rack equipment locations with the OAR prior to start of any work. Contractor and OAR must agree as to the final location of all devices and the cable plant design.
I.
Contractor shall provide sufficient personnel and tools required to participate in Owner’s Quality Assurance Testing as detailed in Attachment “A” of this specification. 1.
J.
Items on check list of Attachment “A” will be examined as a minimum at the System Head End, terminal cabinets, ground vaults, and classrooms. Should the examination show deficiencies related to items in the checklist, Owner’s acceptance testing will be discontinued until corrections have been made. When the Contractor has completed the corrections, a subsequent Quality Assurance test shall be initiated. This procedure is in addition to the system functionality testing required in section 3.03 below.
1.07
The specification will be supplemented by specific items in Section 25570 (Quality Assurance, Test & Acceptance Requirements) as listed below. The Contractor is required to refer to Section 25570 for complete understanding of requirements. 1.
Item 1.01.C.1: The Contractor shall follow CEC, CANSI/EIA/TIA and BICSI installation standards.
2.
Items 1.04.A, 1.04.B, 1.04.D, 1.04.E, 1.04.G, 1.04.I through 1.04.R (inclusively), and 2.04.A.
3.
Appendix A: only general items that refer to cabling in general, electrical, low voltage systems, and installation practices.
WARRANTY A.
PROJECT NAME SCHOOL NAME
Contractor shall warranty that all work executed and materials furnished shall be free from defects in materials and workmanship for a minimum period of 3 years from date of installation acceptance, excluding specific items of work that require a 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-8
warranty of a greater period that may be set forth in this Specification. In the event a manufacturer’s warranty is longer than 3 years, the manufacturer’s warranty shall be the warranty period. Immediately upon receipt of written notice from the District, the Contractor shall repair or replace at no expense to the District, any defective material or work that may be discovered before final acceptance of work or within the warranty period; any material or work damaged thereby; and adjacent material or work that may be displaced in repair or replacement. Examination of, or failure to, examine work by the District shall not relieve Contractor from these obligations.
PART 2 2.01
2.02
PRODUCTS
EQUIPMENT STANDARDS A.
Where applicable all active electronic equipment installed under the Contract shall be listed by UL or a Nationally Recognized Testing Laboratory (NRTL) before installation.
B.
All television equipment and components exclusive of cable shall be like products of a single manufacturer except otherwise reviewed by the Architect.
C.
Equipment Requirements: 1.
In order to establish a standard of quality, items of equipment indicated in the Drawings and Specifications are specified from the products manufactured by Blonder Tongue Laboratories, Inc. Other Manufacturers with equal or better products could be submitted for approval.
2.
The Architect will establish equivalency and compliance of product or components offered for installation under this Contract.
EQUIPMENT D.
Headend: 1.
Antennas: Where MATV type television headend is provided, the following antennas shall be furnished: a.
VHF Antenna: Shall be of the log periodic biconical design with a flat frequency response. Gain shall be 6.0 dB over ½ wave dipole. The antenna shall be constructed of chrome-aluminum tubing with element ends sealed against entry of moisture and weather protected with an anti-corrosion finish. The VHF antennas shall be Blonder Tongue BTY-LP-BB, or equal, and shall meet or exceed the following specifications: Gain:
PROJECT NAME SCHOOL NAME
8.2 dBi over ½ wave dipole 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-9
Impedance:
75 ohms with 1.62 VSWR
Front-To-Back Ratio:
18 dB Minimum
Load:
125 mph
Beam Width:
Low-70 degrees, High-45 degrees
Band Width:
b.
2.
UHF Antenna: Shall comprise of a slot-feed, 11-element log periodic driver. The antenna shall be constructed of heavy-duty seamless chrome-aluminum tubing with the element ends sealed against entry of moisture and protected with an anti-corrosion finish. The UHF antenna shall be Blonder Tongue BTY-UHF-BB, or equal, and shall meet or exceed the following specifications: Gain:
10.2 dBi over ½ wave dipole
Impedance:
75 ohms, VSWR less than 1.67
Front to back ratio:
18 db
Wind Load:
125 mph
Bandwidth:
470-890 MHz
Beam Width:
62 Degrees horizontal
Boosters: Optimizing antenna gain is the desired first choice. A signal output of +44 dBmV shall be minimally provided. Because of terrain or other obstructions, VHF and/or UHF boosters may be required to meet the specified input levels. If these conditions exist, provide booster, which meet or exceed the following: a.
PROJECT NAME SCHOOL NAME
54-88/174-216 MHz
VHF Booster: Frequency Range: Gain: Input Capability: Noise Figure: Input Match: Output Match:
54 - 216 MHz 26 dB +25dbmv each channel 6.5 dB Maximum 8db RL min 5db min
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The VHF boosters shall be lightning protected and housed in a rugged, mast mount aluminum casting, weather protected. VHF Boosters shall be Blonder Tongue CMA-BB with power supply 1536, or equal. A BIDA or ACA amplifier may also be required to boost this signal and/or use of a higher gain, higher directional antenna. b.
UHF Booster: Frequency Range: Gain: Frequency Response: Noise Figure: Input Return Loss: Output Return Loss: Input Capacity:
470 - 806 MHz 20 dB plus 1.25 dB 3.5 dB max. 4.0 dB 3.0 dB 26 dBmv
The UHF booster shall be lightning protected and housed in a weatherproof mast mounted aluminum housing and equal to Blonder Tongue CMA-UC, or equal, with power supply model 1526. A BIDA or ACA amplifier may also be required to boost this signal and/or use of a higher gain, higher directional antenna. 3.
4.
Splitting/Mixing Base and Channel Filters for VHF Off-Air Channels: a.
The unit shall be furnished to split out 3 low and 1 FM band, nonadjacent channels and 4 high band non-adjacent channels. The outputs are then fed to the band pass filters or amplifiers.
b.
Impedance of splitting base shall be 75 ohms input and output. Insertion loss of filters and base shall be 0.9 dB on channels (2-6) 1.5 dB in the FM band and 1.4 dB for channels (7-13).
c.
The skirt selectivity shall be 10 dB down, 9 MHz from center of channel.
d.
Two units can also be provided "back-to-back" for breaking out and balancing and then re-assembling channels into one coaxial line.
e.
The base and filters shall be Blonder Tongue MXF-B and MXF, or equal.
Chassis Options: Process 8VSP over-the-air (OTA) antenna signals according to one of two options as indicated on drawings: a.
PROJECT NAME SCHOOL NAME
Option A: Provide and install two QTRC chassis’s, two appropriate power supply modules, two QTHF rack fans, and ten AQD demodulator modules for conversion from 8VSB channels of 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-11
VHF/UHF frequencies to NTSC composite/L+R audio. Provide and install one MIRC-12V chassis, an appropriate power supply and ten AMM-806 agile modulators for conversion of the NTSC composite/L+R audio signals to ten NTSC VHF/UHF frequencies for analog signal distribution. Connect outputs to the OC-12D combiner. b.
5.
Option B: Provide and install two QTRC chassis’s two appropriate power supply modules, two QTHF rack fans, and ten AQT transcoder modules for conversion from 8VSB channels of VHF/UHF frequencies to ten QAM/VHF frequencies for digital signal distribution. Connect outputs to the OC-12D combiner.
Demodulator: a.
The ATSC/QAM demodulator shall be model BT- AQD or equal, and allows the reception and demodulation of an 8VSB or QAM signal for analog based delivery, with interface with an analog modulator.
b.
Input - 8VSB Mode
c.
(1.)
Tuning Range: UHF 14-69, VHF 2-13 or CATV 2-135
(2.)
Data Rate: 19.392 Mbps
(3.)
Input Level: -20 to +20 dBmV
(4.)
Modulation Type: 8VSB ATSC Compliant
(5.)
Input Connector: 75 Ohm “F” Female
Input – QAM Mode (1.)
Tuning Range: CATV 2-135
(2.)
Data Rate: QAM 64 Annex B: 26.9 Mbps, Auto Detection (a.)
d.
PROJECT NAME SCHOOL NAME
QAM 256 Annex B: 38.8 Mbps, Auto Detection
(3.)
Input Level: -20 to +20 dBmV
(4.)
Input Connector: 75 Ohm “F” Female
Output – NTSC Composite Video (1.)
Output Level: 1V p-p
(2.)
Video Aspect Ratio: 4:3, 16:9 (Pan and SCAN) 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-12
e.
6.
(3.)
Closed Captioning: EIA-608
(4.)
Video Format: 480i NTSC
Output – Analog Audio (1.)
Audio Level: 1 Vrms
(2.)
Audio Control: Adjustable
(3.)
Connectors: RCA left/right
Modulator: a.
The AMM-806 modulators shall receive composite video/ L +R audio from the demodulator and process the signal into RF freq in the VHF/UHF range.
b.
Radar Frequency (RF) : (1.)
CATV Frequency Range: 54-806 (CH’s 2-125)
(2.)
Output Level: 35-45 dBmV, Continuously Variable
(3.)
Aural/Visual Carrier Ratio: -12 to -18 dB
(4.)
Visual Carrier Frequency Tolerance: (a.)
c.
PROJECT NAME SCHOOL NAME
Standard Channels: +/- 5 kHz
(5.)
4.5 MHz Aural Inter Carrier Frequency: +/- 150 Hz (max)
(6.)
Spurious Outputs: -60 dBc
(7.)
Output Impedance: 75 Ohm
(8.)
Output Return Loss: 10 dB
Video: (1.)
Input Level : 1.0 V p-p
(2.)
Frequency Response: fv – 0.5 MHz to fv +4.2 MHz: +/- 1.0 dB
(3.)
Input Impedance: 75 Ohm
(4.)
Input Return Loss: 18 min, dB
(5.)
Differential Phase: 2.0 degrees 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-13
(6.) d.
7.
Group Delay Response: Meets FCC CATV Pre-distortion Requirements for Color Operation.
Audio: (1.)
Input Level: 0.4 to 4.0 V p-p
(2.)
Frequency Range: 30 Hz to 15 kHz, =/- 0.5 dB (Exceeds 100 kHz with Pre-emphasis Defeated)
(3.)
Input Impedance 10k Ohm, Unbalanced
(4.)
Distortion: 30 Hz to 15 KHz 0.6%
Transcoder: a.
The ATSC/QAM demodulator shall be model BT- AQT or equal, and allows the reception and demodulation of an 8VSB or QAM signal for ATSC QAM based delivery, with interface with the Channel Combiner. b.
Off Air 8VSB/QAM Input (1.)
(2.)
(3.)
PROJECT NAME SCHOOL NAME
Demod Mode: (a.)
ATSC: 8VSB or 16VSB
(b.)
ITUA: 16, 32, 64, 128, 128 QAM
(c.)
ITUB: 64, 256 QAM
QAM Input range: (a.)
54 -861 MHz
(b.)
Bandwidth: 6 MHz
(c.)
Symbol Rate: 1 to 6.9 Msps
(d.)
Level: -20 dBmV min For QAM 64
(e.)
-15 dBmV min for QAM 256
8VSB Input Range: (a.)
UHF & VHF 54-806 MHz
(b.)
Bandwidth: 6 MHz
(c.)
Symbol Rate: Up to 19.4 Mbps 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-14
c.
Level: -28 dBmV min for 8VSB
(e.)
-25 dBmV min for 16VSB
(f.)
Input Impedance: 75 ohm
QAM Output: (1.)
PROJECT NAME SCHOOL NAME
(d.)
Output Frequency Range: (a.)
Agile 54-860 MHz (CATV 2-135)
(b.)
QAM bandwidth: Variable
(c.)
Frequency Step: 6 MHz
(d.)
Output Level: +40 dBmV (average measurement)
(e.)
Display Error: +/- 2 dB
(f.)
Level Adjustment Range: 15 dB
(g.)
Modulation Mode: 16, 32, 64, 128, 256
(h.)
Symbol Rate: Variable rate QAM up to 7 Mbaud
(i.)
Spectral Inversion: Auto Recognition
(j.)
Carrier Suppression: 45 dB
(k.)
Roll-off: 12, 15, 18 %
(l.)
QAM SNR: > 40 dB
(m.)
MER: 40 – 43 dB
(n.)
RF Output Impedance: 75 Ohm
(o.)
Spurious: -60 dBc
(p.)
Broadband Noise: -75 dBc min (4Mhz BW @ 40 dBmV)
(q.)
Phase Noise: @ 10KHz: -95 dBc
(r.)
Frequency Stability: +/- 10 KHz
(s.)
QAM I/Q Phase Error: < 1 degree
(t.)
I/Q Amplitude Imbalance: < 1 dB 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-15
8.
Channel Combiners: a.
The channel combiner shall be furnished with twelve (12) input broadband ports for combining modulators and/or processors in the headend. The combiner shall use internally, -80 dB radiation proof passives. The combiner shall provide a -20 dB test point for testing of signals without interruption or service.
( 1. ) ( 2. ) ( 3. ) ( 4. ) ( 5. ) ( 6. ) b. 9.
50-450 MHz 75 ohms 26 dB 38 dB -1.5 dB ± 0.2 dB Relative to Slope
Passive combiner shall be Blonder Tongue OC-12D, or equal.
Mainline Distribution Amplifier and Extender Amplifier: a.
PROJECT NAME SCHOOL NAME
Frequency Range Impedance Input Return Loss Isolation Slope Flatness
The mainline distribution amplifiers shall be integrated push pull circuitry housed in a heavy die cast 100% shielded enclosure. The amplifiers shall be furnished with mounting tabs for securing to any flat surface. The amplifiers shall be Blonder Tongue, or equal, BIDA 86B30P, BIDA 86B-43P, or RMDA-86A-30P or RMDA-86A-43P for rack mounting as required and shall meet or exceed the following: (1.)
Passband: 50 to 860 MHz.
(2.)
Flatness: + 0.75 dB or better.
(3.)
Minimum Full Gain: 33 dB or 49 dB.
(4.)
Manual Gain Control Range: 15 dB.
(5.)
Manual Slope Control Range: 10 dB.
(6.)
Minimum Return Loss: 14 dB input and output.
(7.)
Terminal Impedance: 75 ohms.
(8.)
Noise Figure: 7.0 dB maximum.
(9.)
Hum Modulation: -65 dB.
(10.)
Number of Channels: 77.
(11.)
Output Level: 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-16
(a.)
Lowest Channel: 44 dBmv.
(b.)
Highest Channel: 44 dBmv.
(12.)
Composite Triple Beat Distortion -58 dB.
(13.)
Cross Modulation: -61 dB.
(14.)
AC input: 120 volt, 60HZ.
(15.)
RF Shielding: 90 dB.
(16.)
Operating Temperature: -20° C. to 60° C.
(17.)
Unit shall be two-way capable with the addition of passive return filters, Blonder Tongue BIDA-RF and Active Return Amplifiers, Blonder Tongue BIDA-RA.
B.
Isolation Directional Couplers Outlets and Tapoffs: All taps and/or tap-outlets shall be of the directional coupler design for installation in specified outlet boxes or junction boxes. The specified directional couplers and directional coupler tapoffs shall be selected by the electrical engineer for installation at the outlets, junctionboxes, and terminal cabinets in accordance with physical size requirements and to provide the highest tap isolation values permissible in each system design to meet performance requirements. They shall be Blonder Tongue V-3889, or equal.
C.
Digital Ready Splitters: (For use in the head-end only) The VHF/UHF splitter/combiners shall consist of a 75 ohm hybrid network mounted in a zinc alloy die-cast housing with F series fittings. The network shall be Blonder Tongue, or equal, # DGS-2, DGS-3, DGS-4, or DGS-8 and shall meet or exceed the following: 1.
Bandwidth: 5 to 1000 MHz
2.
Loss (typical): 3.5 dB 5-550 MHz DGS-2, DGS-3, 6-11.2 dB DGS-4, DGS-8 a.
3.7 dB nominal 551-1000 MHz DGS-2, DGS-3
b.
7.5 dB nominal 551-1000 MHz DGS-4
3.
Impedance: 75 ohms at all terminals
4.
-120 dB RFI, solder back design.
5.
Compliant with SCTE Splitter Guidelines
D.
Digital Ready Taps: 1.
PROJECT NAME SCHOOL NAME
One, two, four and eight port models shall be Blonder Tongue DGT, DGT-2, DGT-4, DGT-8 or equal with -120 dB RFI, solder back design. 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-17
E.
2.03
a.
Bandwidth: 5-1000 MHz+
b.
Isolation Values (dB) = 6, 8, 10, 12, 14, 16, 18, 20, 24, and 30.
TV/Video Receiver/Monitor installed in the Media Rack shall ATSC/QAM/NTSC compatible TV, or equal, with the following features:
be
an
1.
13-inch screen with 420 lines of horizontal resolution.
2.
BNC composite video and RCA audio input and output jacks.
3.
RF input with 181-channel cable compatible tuner.
4.
Precision notch filter and comb filter for chrominance and luminance to improve horizontal resolution.
5.
Built-in speaker.
6.
Furnish monitor rack mounting kit.
ACCESSORIES F.
Terminal outlets in system from remote directional coupler tap shall be designed to mount in a single gang box. Terminal outlets shall be furnished with an integral 75ohm resistor and a cable connector actuated switch, which automatically terminates the tap line when the push-on cable connector is withdrawn. Terminal outlets shall be Blonder Tongue V-ST, or equal.
G.
Coaxial Connectors: 1.
Furnish coaxial connectors to be installed with 412 type cables to provide continuous maximum radiation security and which exceeds FCC requirements for radiation suppression. All connectors for cable-to housing, seized center conductor, termination adapters, and splice connectors shall exhibit the same radiation suppression characteristics.
2.
Coaxial connectors for installed 412 type cables shall be F type fittings with separate crimp rings.
3.
Coaxial connectors for RG-6, RG-11 shall be F-Type compression fittings. FType fittings with crimp rings shall not be accepted for use on RG6 or RG11 coaxial cables.
H.
Terminators provided shall be precision 75 ohm types, 1/4 watt F type terminator designed for installation in the 54 to 300 MHz and 470 to 890 MHz frequency range. Terminators shall be Blonder Tongue BTF-TP, or equal.
I.
Equipment Racks and Cabinets:
PROJECT NAME SCHOOL NAME
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-18
1.
The headend equipment shall be furnished and installed in a floor standing rack at the approximate location indicated on the Drawings.
2.
The rack shall be constructed of at least 16-gauge steel, heavily reinforced for maximum strength and durability. It shall be furnished with a hinged and keylocking access to the equipment and be finished in ebony black, baked enamel. The rack shall be furnished with adjustable mounting rails, which will allow a second, or rear set of rails to be installed. The rack shall be furnished with full height, drilled, tapped front mounting rails and with rear mounting rails as required and shall be provided with zone 4 earthquake reinforcing kits. The rack shall be listed by UL reexamination service. The rack shall provide at least 61 inches total of panel mounting space. The rack shall be no more than 84 inches high, 22-3/8 inches wide and 18 ½ inches deep.
3.
Racks shall be provided with blanks to cover unused rack spaces.
4.
Racks and cabinets shall be furnished with the required 120-volt power outlets for the active system components.
J.
2.04
Audio-Video Input Panels: Provide custom audio-video input panels as indicated on Drawings. Input panels shall consist of an engraved stainless steel cover plate with a UHF type BNC video receptacle and a Canon type XLR-3-31 audio receptacle. The cover plate shall be engraved "VIDEO-IN" and "AUDIO-IN.”
CABLES A.
Coaxial cables furnished shall consist of three basic types and shall meet or exceed the following specifications: 1.
Coaxial cables shall be Series 6 (RG-6 type), Series 11 (RG-11 type), or 412 type.
2.
All RG-6, and RG-11 types installed in the system shall be constructed as follows: a.
Center conductor, RG-6: 18 gauge copper-clad steel (CCS) with 21% minimum conductivity. (1)
PROJECT NAME SCHOOL NAME
Center conductor, RG-11: 14-gauge copper-clad steel with 21% minimum conductivity (backbone).
b.
Dielectric: Foamed polyethylene.
c.
First Shield: 2 mil laminate of aluminum and polyester with a 1/8-inch overlap.
d.
Second Shield: 40% density aluminum braid.
e.
Jacket: Low temperature polyvinyl chloride. 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-19
3.
4.
5.
Required RG-6 type cables shall be furnished for feeders, antenna down leads, internal rack wiring, and trunks as designed on the Drawings. The main usage shall be for feeder lines and tap drops. Where conduit space limitations dictate installation for trunk lines other than as noted on the Drawings, obtain review of the Architect before installation. The RG-6 type cables shall meet the following: a.
Impedance:
b.
Return loss match:
c.
Attenuation, dB/100 feet:
Better than 20 dB to 890 MHz
(1)
1.5 dB at 55 MHz
(2)
3.43 dB at 300 MHz
(3)
4.51 dB at 500 MHz
d.
Sweep tested and certified from: 5 to 1000 MHz
e.
Radiation shielding: 80 dB minimum.
Approved RG-11 type cables shall be furnished for trunk lines as noted on the Drawings and shall be flooded when installed underground (RG-11/UG). Cables shall meet the following: a.
Impedance: 75 ohms
b.
Return loss match: Better than 21 dB to 890 MHz
c.
Attenuation, dB/100 FT. at 70 °F. (1)
0.95 dB at 55 MHz
(2)
2.17 dB at 300 MHz
(3)
2.85 dB at 500 MHz
(4)
3.58 dB at 750 MHz
d.
Sweep tested and certified from: 5 to 1000 MHz
e.
Radiation shielding: 80 dB minimum.
Jacketed 412 type cable shall be furnished for trunk lines where noted on the Drawings, shall be flooded when installed underground, and shall meet the following: a.
PROJECT NAME SCHOOL NAME
75 ohms
Impedance: 75 ohms 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-20
b.
6.
B.
PART 3 3.01
Attenuation dB/100 feet at 70° F: (1)
0.68 dB at 55 MHz
(2)
1.35 dB at 211 MHz
(3)
2.03 dB at 450 MHz
(4)
2.68 dB at 750 MHz
c.
Center Conductor: Copper-clad aluminum, 14 gauge, diameter .092 inches.
d.
Dielectric: Foamed Polyethylene.
e.
Seamless Aluminum Sheath Jacket: Outside diameter: .412 inch
f.
Outer Jacket: Black polyethylene
g.
Sweep tested and certified: 5 to 1000 MHz
All provided cables shall be new and of recent manufacture. Cables with abrasions, kinks, or other damage shall not be installed in the system. Cables shall be as manufactured by Times Fiber Communications, Inc., Belden, or CommScope.
Other Cables 1.
Audio cables furnished for the CCTV input to the modulators shall be miniature type standard 2-conductor, shielded with Mylar and integral drain wire with an overall vinyl jacket with a nominal outside diameter of .135 inch.
2.
Cable entries to junction boxes shall be furnished with waterproof grip connectors T & B series 2000 service entrance cable sheathed connectors. Connectors furnished with aluminum-sheathed cables shall be designed to prevent corrosion caused by joining of dissimilar metals.
EXECUTION AND INSTALLATION
TELEVISION SYSTEM INSTALLATION A.
PROJECT NAME SCHOOL NAME
Coaxial cable runs shall be continuous between devices. No connectors, fittings, terminations, splices, or passive devices shall be installed in any inaccessible location. Connections shall only be provided at outlets, junction boxes, or terminal cabinets or as noted on Drawings.
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-21
B.
Rigid galvanized plumbing pipe, cut to length as required size 1-1/2 inches in diameter, shall be furnished for all antenna masts, installed as detailed on the Drawings. 1.
All antennas and antenna supporting structures shall withstand 125-mile winds from any direction.
2.
Minimum clearance for antennas above roof or other structures shall be 12 feet.
3.
No exposed coaxial cable down leads are permitted. Install antenna down lead through antenna mast or conduits as detailed on the Drawings. All antennas shall be grounded.
4.
Antenna supporting guy wires are not permitted.
C.
Exposed conduit clamps, mast brackets, mounting frames, and accessory hardware shall be heavy gauge steel and be hot-dip galvanized.
D.
Where splitters and couplers are mounted in terminal cabinets they shall be installed by L-brackets with cable connections provided in a vertical plane, and be 18” minimum in length.
E.
Headend cabinets shall be furnished with full height plugmold strips installed in each side of the equipment cabinet. Plugmold strips shall be Wiremold 20GB306 for 42-inch and taller cabinets and 20GB206 for 28 inch cabinets.Plugmold strips shall be complete with Wiremold 2110A entrance fitting, insulated bushings, and accessory hardware.
F.
Exterior junction boxes for conduit and coaxial cable runs shall be 6 inch x 6 inch x 4 inch weatherproof enclosures and shall be Federal Model A6R44, or equal. Conduit entries to junction boxes shall be furnished with compression waterproof connectors.
G.
Coaxial cable connectors shall be solderless, compression F type, and 75 ohms nominal impedance.
H.
Coaxial cables entering and exiting terminal cabinets and junction boxes shall be tagged with plastic coated cable markers wrapped around cable.
I.
Coaxial cables furnished for interconnection in terminal cabinets shall be tagged and neatly dressed to facilitate servicing and identification.
J.
Coaxial connectors shall be installed with factory recommended tools designed for the connectors being installed.
K.
Equipment shall be mounted to rack rails or to panels, which are mounted to rack rails. Cables to all equipment shall be routed vertically at the inside wall of the rack and shall be neatly bundled and secured to the rack or the rail. Cables shall be
PROJECT NAME SCHOOL NAME
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-22
broken out for each item of equipment and routed horizontally. Cables shall not be run horizontally for more than nine inches without being secured.Cables and cords to panel mounted equipment shall all enter from the same side to allow the panel to be swung out for access and service.
3.02
L.
Active and passive devices and all coaxial cables and connectors installed from the headend mainline amplifier through the most remote tap or termination in the system shall exceed FCC regulations Part 76, Sub-Part “k”. Radiation requirements for connectors, cables, and passive devices must exceed 80 dB.
M.
Re-tune entire CATV system after the expansion, modernization or installation of a new coaxial distribution system. Reset level and tilt on all distribution amplifiers.
RELATED SYSTEMS INSTALLATION A.
ADJACENT CHANNEL INTERFERENCE 1.
B.
In reception areas where adjacent channels such as 3, 6, 8, or 10 are received on the antenna arrays, provide high-Q-traps or bandpass filters for attenuating the unwanted signals a minimum of 40 dB on both aural and visual carriers. Installed systems shall not contain any visible evidence, when viewed on a standard school receiver, of interference caused by antenna pickup of adjacent channels. MATV HEADEND
1.
All visual carrier levels shall be balanced to a plus or minus 1 dB before insertion to the mainline amplifier.
2.
Aural carriers on adjacent channels shall be reduced a minimum of 15 dB below their associated visual carrier.
3.
A minimum of 1 dB of isolation shall be required between any two tuned circuit devices in the headend.
4.
Any received non-adjacent channels, which have aural carriers equal to or greater than the received visual carrier shall be reduced a minimum of 12 dB.
5.
Minimum acceptable input signal to the amplifier on any VHF channel shall be 10 dBmv.
6.
Mainline amplifiers utilized in the MATV headends shall provide a minimum output of plus 44 dBmv with a 10 dB block tilt.
C.
GROUNDING 1.
PROJECT NAME SCHOOL NAME
All equipment in the headend cabinets shall be bonded together with a common braided grounding wire, which shall be grounded to the nearest earth ground. 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-23
3.03
2.
Provide a weatherproof surge protector for all antennas, PolyPhaser Model 096-0617P-A, or equal with # 6 AWG grounding conductor to a grounding electrode. The grounding conductor shall be bonded to the mast and surge protector.
3.
Furnish, install, and bond a #6 AWG, green grounding wire from the main terminal cabinet to head end equipment rack main terminal. Frame of rack and all circuit wiring requiring grounding shall be grounded to ground system at equipment rack main terminal.
OWNER’S QUALITY ASSURANCE CERTIFICATION AND TESTING A.
Before Substantial Completion, test and demonstrate the performance of the system in the presence of the Owner.
B.
The Owner may require any changes, adjustments, or further tests deemed necessary to assure that the systems are complete and operational in accordance with the Specifications.
C.
Provide all test and reception gear required to demonstrate the performance as specified.
D.
Provide the following equipment for testing and performance demonstration: 1.
A solid state video signal generator capable of providing color bars and test patterns, Extron model VTG 200 or and an Agile audio-video modulator with audio and video inputs and sub band through 550 MHz output, broadcast and CATV, including HRC and IRC assignments, Blonder Tongue AM 40-550 with Opt. H.
2.
A field strength meter capable of displaying the video and audio carrier levels for all channels provided manufactured by Blonder Tongue (BTPDA-2, -4), Pico Macom (Pico-Pro), Sadelco (DisplayMax 800, 800CLI, Jr), or approved equal.
E.
The Contractor shall provide a standard EIA/ATSC color television receiver for system checkout. Verify the convergence of the receiver supplied for testing of ringing and color fidelity.
F.
Perform and record the following tests: 1.
Aural and visual signal level measurements on every received channel.
2.
Aural and visual signal level measurements on every received and distributed channel at the end tap of each branch, and at random taps of each branch in each system.
PROJECT NAME SCHOOL NAME
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-24
3.
Signal-to-noise ratio at the output of the last active device in the system.
4.
Using the received and processed television signals, visual checks shall be conducted on all received and originated signals at the source and compared to the outlets in the distribution system. System performance to be checked with the test receiver are as follows:
5.
No evidence of ringing, ghosting, noise, and changes in hue or color fidelity at all test points.
b.
No evidence of cross-channel intermodulation components.
c.
No evidence of any RF beats in any received or distributed channel.
d.
No visual evidence of hum modulation in installed system observed on a blank screen.
Visual checks of the return signals shall be viewed for noise cross-modulation components and interference in the presence of color picture and without modulation.
G.
3.04
a.
Correction of Defects: If the system, or parts thereof, does not meet specified performance, conduct further tests including complete sweep analysis to locate defective components or workmanship. Replace defective Work before further tests are performed.
PROJECT RECORD DOCUMENTS A.
As-Built Drawings: 1.
Provide one complete Mylar transparency and 3 Blue line copies size E (30” X 42”) of Project site and building plans, indicating location of equipment, conduit, cable routing, ground vaults, terminal cabinets, pull boxes, and other installation information.
2.
Provide two copies of the record Drawings in .DWG format, prepared using the most recent version of AutoCAD on a labeled CD-ROM for use on a Windows platform. a.
PROJECT NAME SCHOOL NAME
LAUSD utilizes layers as a key tool in controlling visibility of drawing elements and to provide consistent information between Drawings, yet provide control over what is seen on each sheet. Television System wiring shall be shown on a separate layer, labeled as “Television System” that uses both building floor plans and conduit supporting structure layers below. The use of any version control blocks or company logos shall be on a layer separate from the premise wiring asbuilt Drawings. 11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-25
b.
All AutoCAD files (software copies) supplied shall be multi-layer drawings with the following layers as a minimum: (1)
Layer 1 shall contain title blocks only.
(2)
Layer 2 shall contain building or site plan backgrounds only.
(3)
Layer 3 shall contain devices, cabling, and other system components.
3.
Provide floor plans indicating all devices, terminal cabinets and cross connect locations, conduit runs, ground vaults, wire types, cable routing of all cables both underground and in each building with conduit fill and count, and as-built coding used on each cable.
4.
Drawings shall include block diagrams indicating all items and their point-topoint connections in a manner following floor and site plan layout. Drawings shall also include as-built single line diagram, cable site plot plan and floor plans indicating all cables both underground and in each building with conduit, and as-built coding used on each cable Record Drawings shall be presented in both hard copy and electronic form.
B.
Operating and Servicing Manuals, Record Drawings: 1.
Deliver three copies of operating and servicing manual. Each complete manual shall be bound in three ring binders and all data shall be typewritten or drafted.
2.
Each manual shall include a page with Project site and Project name, date of Substantial Completion, Contractor’s name, address, telephone, and fax numbers.
3.
Each manual shall contain a letter, signed by an officer of the company, indicating the beginning and ending date of any warranties described in subsection 1.07 of this specification and shall describe the companies’ commitment to service the warranty during the terms specified.
4.
Each manual shall contain all instructions necessary for proper operation and servicing of system and shall include: a.
All measurements and readings obtained during system checkout shall be recorded and included with the manuals and as-built Drawings. (1)
b.
PROJECT NAME SCHOOL NAME
A copy of all measurements and readings shall also be installed in the headend and all line extender cabinets.
A single line diagram of the system indicating all items and their pointto-point connections in a manner following floor and site plan layout.
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-26
5.
3.05
d.
A wiring destination schedule for each circuit leaving console and each rack.
e.
Manufacturer’s service manuals equipment schematics.
f.
All custom fabricated circuits, components, and connections not detailed in the manufacturer’s manuals shall have wiring diagrams detailing to component level, the manner in which the circuits are connected.
g.
A schematic diagram of each amplifier and other components, transistor complements, and replacement part numbers.
Each manual shall also include as-built single line diagram, cable site plot plan, and floor plans indicating all cables both underground and in each building with conduit, and as-built coding used on each cable. Drawings Size A (8-1/2 inches x 11 inches) and size B (11 inches x 17 inches) shall be bound into the manual. Larger drawings shall be folded and inserted into transparent envelopes bound into the manual. Programming forms of each system shall be submitted with complete information.
Protect the Work of this section until Substantial Completion.
CLEANUP A.
3.07
A complete 2 wire diagram of all connections made between components inside the system head end console.
PROTECTION A.
3.06
c.
Remove rubbish, debris, and waste materials and legally dispose of off the Project site.
OWNER ORIENTATION A.
Before Substantial Completion, provide an eight (8) hour Owner instruction period to designated Owner personnel. Coordinate through the OAR for all scheduling and attendee determination.
B.
Instruction shall be based on manufacturer’s written operating instructions covering those features of interest to the Owner and applicable to the Work. Location of any available web-based instructional materials shall also be communicated.
PROJECT NAME SCHOOL NAME
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-27
C.
PROJECT NAME SCHOOL NAME
After Substantial Completion, but before contract completion, provide two (2) additional one (1) hour “refresher” instruction sessions at times agreed upon by the Owner. Coordinate through the OAR.
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-28
ATTACHMENT A TELEVISION SYSTEM OWNERS QUALITY ASSURANCE Site Location Code/Name Network Engineer
IOR
PM Recommendation Electrical Owner is to examine the following items based on the criteria defined in section 25850. Owner is to examine 100% of rack contents. Other items not included in main rack will be tested at 10% rate. If deficiencies are noted, the system will be failed. As a courtesy, Owner will consider continuing testing to a 20% rate to determine the integrity of the system.
Cable TV Distribution Check List
Pass
Fail
General Are all active components and connections located in secure interior locations?
Is a signal source (antenna or cable feed) present? Have all system and cable labels been properly placed? Have cable destination indexes been placed in Headend and field amplifier cabinets? Is all Headend equipment bonded and grounded to supplied ground point through a common ground strap? Are all coaxial jumpers a minimum of 18” in length? Are all remote (field) amplifiers amp chassis grounded? Has the rack been bolted to the floor and seismically braced at the top?
Classrooms Using a field strength meter and locating TV tap furthest from the distribution amplifier in an given building, ascertain that all channels have a minimum of +6dB at tap. Determine that as a minimum, Channels 2,4,5,7,9,10, 11, & 13 are available in the VHF spectrum. Determine that as a minimum, Channels 28 and 34, are available in the UHF spectrum.
Are all channels free from: Ringing, ghosting, noise, and changes in hue or color fidelity at each test point. Evidence of cross-channel intermodulation components. Evidence of any RF beats in any received or distributed channel. Visual evidence of hum modulation in installed system observed on a blank screen.
Important Note: Failure on any category, constitutes failure of the entire system END OF SECTION
PROJECT NAME SCHOOL NAME
11/30/2007 TELEVISION SYSTEM-COAXIAL DISTRIBUTION 25850-29
