ITEM 0 8 6 8 0 .8 4 5 3 0 5 M - V IDEO/DA TA M ICROW A V E TRA NSM ITTER ITEM 0 8 6 8 0 .8 4 5 4 0 5 M - V IDEO/DATA M ICROW AV E RECEIVER
DESCRIPTION:
Under these items, the Contractor shall furnish and install a video/data microwave link consisting of a Video Microwave Transmitter with two bidirectional RS-232 data channels and a Video Microwave Receiver with two bidirectional RS-232 data channels as shown on the Plans and as directed by the Engineer.
The video/data microwave link is a simplex (unidirectional) link for video which modulates one analog baseband National Television System Committee (NTSC) video signal onto an appropriate carrier at the transmit end and then demodulates this signal to recover the baseband video signal at the receiver end. Both ends of the link shall also be able to support two full duplex RS-232 data channels operating at a minimum of 9600 bits per second.
The microwave transmitter/receiver assemblies shall consist of an integral parabolic antenna and microwave transmitter, receiver, and modulation equipment which shall be designed for mounting on CCTV camera poles or sign bridge structures. All microwave equipment shall be from the same manufacturer. All Microwave transmitter/receiver units shall be of solid state design consisting of an integral package containing the antenna and transmitter or receiver.
The Contractor shall select a carrier frequency which does not require frequency coordination.
MATERIALS:
All materials furnished, assembled, fabricated or installed under this item shall be new, corrosion resistant and in strict accordance with the details shown on the plans and in the Special Specifications.
The Contractor shall file the necessary application and obtain a License if required from the Federal Communications Commission (FCC). The Contractor shall verify that there is no frequency conflict with other equipment at the sites shown on the plans.
Functional Requirements
The Contractor shall furnish and install the video microwave equipment and all necessary components required to form a completely functional full motion video communications link with two data channels.
The video microwave equipment shall be capable of transmitting a baseband video signal between two locations with reasonable line of sight over distances not to exceed 2 kilometers.
Electrical Requirements
Channel Capacity
The microwave equipment shall provide a single simplex full motion analog video channel and two full duplex data channels.
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The Video Microwave Transmitter station shall accept a standard analog NTSC color or monochrome video signal (1 volt p-p, 75 ohm). The data channels shall conform to the RS-232C/D standard.
Power Requirements
The microwave equipment shall meet all of its specified requirements when the input power is 115 + 20 VAC, 60 + 3 Hz.
The power supply shall be integral to the microwave units.
Transient Suppression
The video input of the Microwave Transmitter and output of the Microwave Receiver equipment shall terminate in a pole mounted surge protection enclosure or field equipment cabinet as shown in the plans.
Mechanical Requirements
Enclosure
The equipment shall be packaged in a sturdy, durably finished metal housing suitable for Microwave radio equipment and for mounting on a pole exposed to the weather.
Microwave Video Transmitter
The video transmitter shall have the following features:
RF source: Oscillator/multiplier Power output 250 mV/m @ 3 meters from transmit antenna (minimum) Frequency stability: plus or minus 0.0005 percent at -30 Deg C. to +60 Deg C. System gain: 137 dB
The video transmitter shall be packaged with an integral antenna. The antenna mounting hardware for the transmitter shall be designed to allow for at least 90 degrees of azimuth and elevation adjustment and shall provide for a positive position lock once optimum alignment has been achieved. All external screws, nuts and locking washers shall be stainless steel. No self-tapping screws shall be supplied unless specifically approved by the engineer. The antenna shall comply with the following specifications:
Type: parabolic Diameter: 31.8 cm (12.5 inches) Polarization: linear Gain: 35 dB Front to back ratio: 40 dB Beam-width @ 3dB points: 3.5 Deg.
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Microwave Video Receiver
The video receiver shall have the following features:
Type: Superheterodyne System noise figure: 6.2 dB Threshold: -80 dBm Maximum receiver input: -10 dBm Signal level monitor for antenna alignment
The video receiver shall be packaged with an integral antenna. The antenna mounting hardware for the receiver shall be designed to allow for at least 90 degrees of azimuth and elevation adjustment and shall provide for a positive position lock once optimum alignment has been achieved. All external screws, nuts and locking washers shall be stainless steel. No self-tapping screws shall be supplied unless specifically approved by the engineer. The antenna shall comply with the following specifications:
Type: parabolic Diameter: 31.8 cm (12.5 inches) Polarization: linear Gain: 35 dB Front to back ratio: 40 dB Beamwidth @ 3dB points: 3.5 Deg.
Environmental Design Requirements
The equipment shall meet all its specified requirements during and after being subjected to any combination of the following conditions:
Ambient temperature range of -37° to 74° C.
Relative humidity range of 5 to 95%, non-condensing.
Operation in rain, fog and snow over the installed link distance (not to exceed 2 kilometers) provided that attenuation caused by these environmental conditions is within the manufacturer’s design guidelines for the Microwave equipment provided.
CONSTRUCTION DETAILS:
The Video Microwave Transmitter/Data Transceiver and Video Microwave Receiver/Data Transceiver and all other components required for the operation of a wireless video/data link shall be installed under this Contract item. The Contractor shall verify that the microwave path is free of obstructions that could interfere with the operation of the link.
Documentation Requirements
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Three (3) complete sets of operation and maintenance manuals shall be provided. The manuals shall, as a minimum, include the following:
Complete description of equipment operation Complete installation procedures Complete performance specifications (functional, electrical, mechanical and environmental) on the unit or the link as applicable Complete and accurate troubleshooting, diagnostic and maintenance procedures Complete and accurate schematic diagrams Complete parts list including names of vendors for parts not identified by universal part numbers such as JEDEC, RETMA, or EIA Pictorial of components layout on circuit board Complete stage-by-stage explanation of circuit theory and operation
Testing Requirements
The microwave equipment shall be subjected to the levels of testing described in the ITS General Provisions for this Contract.
Training Requirements
Prior to the installation of any specified equipment, the Contractor's personnel shall have received training from the supplier on installation, operations, testing, maintenance, and repair procedures of all equipment. No equipment will be accepted without this proof.
In addition, training shall be provided to the individuals designated by the Engineer. The training shall include all material and manuals required for each individual. The training shall be as follows:
Engineering Training
A minimum of 6 hours of training for up to five (5) engineering and operations personnel shall be provided. The training shall include both classroom and hands on demonstration of the Video Microwave equipment installation and operation. It shall include any calibration or adjustments of the equipment required at installation as well as those required to maintain peak performance over its expected life. It shall focus on installation, alignment, operation, fault isolation to the module and/or transceiver unit level and procedures for operation of the microwave links and any electronic equipment required for installation and maintenance.
Maintenance Training
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A minimum of 12 hours of training for up to five (5) maintenance personnel with an electrical/electronic background shall be provided. The training shall include both classroom and hands on equipment operation and maintenance. It shall include theory of operation, installation, alignment, operation instructions, circuit description, troubleshooting, preventative maintenance, field diagnostics, and field adjustments. It shall focus on installation, alignment, operation, fault isolation to the module and/or transceiver unit level and procedures for operation of the microwave links and any electronic equipment required for maintenance.
METHOD OF MEASUREMENT:
This work will be measured as the number of Video Microwave Transmitter/Data Transceiver and Video Microwave Receiver/Data Transceiver units furnished, installed, made fully operational and tested.
BASIS OF PAYMENT:
The unit price bid for each Video Microwave Transmitter/Data Transceiver and Video Microwave Receiver/Data Transceiver shall include the cost of furnishing all labor, training, materials, tools and equipment necessary to complete the work. Payment for all miscellaneous hardware, cabling, connectors, necessary documentation and testing shall be included under this item.
Progress payments will be made as described in the section on Measurement and Payment in the ITS General Provisions for this Contract.
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