1993 Specifications CSJ 0500-01-117 SPECIAL SPECIFICATION 1291 Fiber Optic Video Data Transmission Equipment 1. Description. This Item shall govern for the furnishing and installation of Fiber Optic Video Data Transmission Equipment in designated equipment cabinets in the field and in the Satellite Control Center as shown on the plans, as detailed in the Special Specifications and as directed by the Engineer. 2. Submittal Components. As a minimum, the submittal for this item shall completely address the following: Transmitting device Simplex data link signal Optical detector compatibility Operating wavelength Optical fiber compatibility Transmitter video/data input parameters Power requirements Transmitter optical output power Surge suppression Receiver optical sensitivity Wiring Receiver automatic gain control Receiver video/data output parameters Connectors a. Optical b. Video c. Data d. Power e. Gold Plating Modulation method Signal to noise ratio Linearity Tilt Differential phase Modular design Differential gain Housing Baseband frequency response Environmental parameters Standards Compliance Power Supply Simplex data link frequency response 3. Material. 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 Specifications. (1) Functional Requirements. The Fiber Optic Video Data Transmission Equipment (transmitter and receiver system) shall transmit video from the field video camera and receive simplex pan, tilt and zoom (PTZ simplex data communications link) data simultaneously for video camera controls (in the reverse direction). This unit shall operate with one fiber and utilize FC fiber optic connectors. The video fiber optic transmitter shall generate optical signals modulated by the baseband video signal from the video camera output in the form of pulse frequency modulation. The video fiber optic receiver shall detect the optical signal and shall convert it to baseband video signal. The operating optical wavelength shall be 1300 nm. Each fiber optic link shall meet RS-250B medium haul video requirements. Both the video fiber optic transmitter and receiver shall be from the same manufacturer. 1-5 1291
(2) Electrical/Optical Requirements. (a) Transmitter Video Input. Transmitter Video Input shall be 75 Ohms nominal, 1.0 Volt peak to peak RS-170 NTSC standard between sync tip to 100% white level (- 40 IRE to + 100 IRE). (b) Transmitting Device. The transmitting device shall be a light emitting diode (LED) or LASER diode which shall have an MTBF of 100,000 hours at 160 F ambient. (c) Transmitter Optical Output. Output power to 8/125 singlemode glass fiber at a wavelength of 1300 nm shall be sufficient to accommodate a link loss budget of 20 db or more. No optical spacers or optical doughnuts will be allowed for compensation of optical link operational dynamic range. (d) Optical Detector. The optical detector of the receiver shall be an APD diode, a PIN or a device approved by the Engineer. (e) Receiver Optical Input. Receiver input shall have a minimum sensitivity of 20 db below the transmitter output level and operate within the parameters of this Specification. No optical spacers or optical doughnuts will be allowed for compensation of optical link operation dynamic range. (f) Receiver Automatic Gain Control. The receiver shall have automatic gain control (AGC) circuitry to provide the receiver with the required dynamic range from transmitter receiver spacing of 1 to 20 db. (g) Receiver Video Output. Receiver Video Output shall be 75 Ohms nominal, 1.0 Volt peak to peak between sync tip and 100% white level. (h) Modulation. Modulation shall be pulse frequency modulation. (i) Signal to Noise Ratio. The system signal to noise ratio (SNR), measured as peak to peak white to blanking, to rms noise (ppwb/rms) in a 10 khz to 5 MHz bandwidth, shall be better than 60 db. (j) Linearity. Linearity shall be better than 1%. (k) Tilt. Tilt shall be less than 2%. (l) Differential Phase. Differential Phase shall be less than 0.5 degrees at 10% to 90% average picture level (APL). (m) Differential Gain. Differential Gain shall be less than 2% at 10 to 90% average picture level (APL). (n) Frequency Response. The video signal frequency response shall be ± 0.1 db, 10 Hz to 0.5 MHz; ± 0.2 db, 0.5 MHz to 4.2 MHz. The 3 db bandwidth shall be 10 MHz. (o) Simplex Data link Frequency Response. The data link frequency response shall be DC-100 khz. 2-5 1291
(p) Simplex Data link Communications Compatibility. The data communications link shall be field programmable by shorting straps or dip switch settings of the video fiber optic transmission equipment. The data link shall be compatible with RS-232, RS-422, RS485, 2 wire manchester, BI-Phase, NRZ and NRZI digital encoding with better than 10 to the minus ninth Bit Error Rate with more than a 20 db link loss. The data link shall be compatible with a DB 9, a DB 25 connector or a terminal block connector. (q) Optical Fiber Compatibility. Optical Fiber Compatibility shall be 8/125 micron singlemode glass fiber. (r) Power Requirements. Transmitters and receivers shall operate on standard 115 VAC electrical service. The equipment shall operate over a voltage range of 115 VAC, plus or minus 20 VAC at 60 HZ. Modular units (stand alone) shall be supplied with an internal or low voltage external wall mounted power supply with a minimum of a 6 ft. power cord terminating in a standard 2 or 3 prong line plug. Maximum power requirements shall not exceed 5 Watts for each transmitter or receiver. The equipment operation shall not be affected by transient voltages, surges and sags normally experienced on commercial power lines. It is the Contractor's responsibility to check the local power service to determine if any special design is needed for the equipment. The extra cost, if required, shall be included in the bid of this Item. (s) Surge Protection. Surge protectors as specified in the Special Specification, Cabinets shall be installed in the equipment cabinet for the coaxial cable connection to the video camera. (t) Power Service Transients. The equipment shall meet the requirements of Sec. 2. 1.6, Transients, Power Service of the NEMA Standard TS-1-1989, latest revision. (u) Wiring. Line wiring shall meet the requirements of the National Electric Code. All wires shall be cut to proper length. Cable slacks shall be provided to facilitate removal and replacement of assemblies, panels, and modules. No wire shall be doubled back to take up slack. Wires shall be neatly laced into cable with nylon lacing or plastic straps. Cables shall be secured with clamps. (v) Power Service Protection. The equipment shall contain readily accessible, manually resettable or replaceable circuit protection devices (such as circuit breakers or fuses) for equipment and power source protection. (w) Fail Safe Provision. The equipment shall be designed such that the failure of the equipment shall not cause the failure of any other unit of equipment. 3-5 1291
(3) Mechanical Requirements. (a) Modular Design. The equipment shall be modular in design such that major portions may be readily replaced in the field. Modules of unlike functions shall be mechanically keyed to prevent insertion into the wrong socket or connector. All modules and assemblies shall be clearly identified with name, model number, serial number, and any other pertinent information required to facilitate equipment maintenance. (b) Connectors and Harness. All external connections shall be made by means of connectors. The connectors shall be keyed to preclude improper hookups. All wires to and from the connectors shall be color coded and/or appropriately marked. Video input and output connectors shall be BNC type. Each and every conductive contact surface or pin shall be plated with a minimum of 50 microns of gold. Optical input and output connectors shall be the FC type with stainless steel housing and ceramic ferrule. Connecting harness of appropriate length and terminated with matching connectors shall be provided for interconnection with the video cameras, video switcher, video multiplexor and the fiber optic network. (c) Housing. The receiver and transmitter packages shall be suitable for rack mounting, shelf mounting or stand alone packages. Card cages for rack mounting of equipment shall be equipped with a power supply capable of supplying power to a fully loaded card cage. The card cage shall be rack mounted on a standard EIA 19-in. rack. (4) Environmental Design Requirements. The equipment shall meet all its specified requirements during and after subjecting to any combination of the following requirements. Ambient operational temperature range of 0 F to 160 F Relative humidity from 0% to 95%. 4. Construction Methods. The equipment design and construction shall utilize the latest available techniques with a minimum number of parts, subassemblies, circuits, cards, and modules to maximize standardization and commonality. The equipment shall be designed for ease of maintenance. All component parts shall be readily accessible for inspection and maintenance. Test points shall be provided for checking essential voltages and waveforms. 4-5 1291
(1) Electronic Components. All electronic components shall comply with Special Specification, Electronic Components. (2) Mechanical Components. All external screws, nuts, and locking washers shall be stainless steel; no self-tapping screws shall be used unless approved by the Engineer. All parts shall be made of corrosion resistant material, such as plastic, stainless steel, anodized aluminum, or brass. All materials used in construction shall be protected from fungus growth and moisture deterioration. Dissimilar metals shall be separated by an inert dielectric material. (3) Testing, Documentation and Warranty. Testing of the Fiber Optic Video Data Transmission Equipment shall be in compliance with Section 2. of Special Specification, Testing, Training, Documentation and Warranty. Documentation for the Fiber Optic Video Data Transmission Equipment shall be in compliance with Section 4. of Special Specification, Testing, Training, Documentation and Warranty. Warranty for the Fiber Optic Video Data Transmission Equipment shall be in compliance with Section 5. of Special Specification, Testing, Training, Documentation and Warranty. 5. Measurement. This Item will be measured as each unit furnished, installed, made fully operational and tested in accordance with these Special Specifications or as directed by the Engineer. 6. Payment. The work performed and materials furnished in accordance with this Item and measured as provided under Measurement will be paid for at the unit price bid for Fiber Optic Video Data Transmitter or Fiber Optic Video Data Receiver. These prices shall be full compensation for all equipment described under this Item with all cables and connectors; for all documentation and testing; and for furnishing all labor, materials, training and equipment necessary to complete the work. 5-5 1291