Department of Transportation, Federal Aviation Administration, Fort Worth, TX 76193-0055

58 -- COMMUNICATIONS EQUIPMENT SOL DTFA07-95-R-00054. DUE 053195. Contact: Rose Marie S. Mendoza, (817) 222-4338. Communications Equipment - Potential Sources Sought: Radio Communication Equipment for an indefinite quantity for various locations, consisting of the following states: Arkansas, Louisiana, New Mexico, Oklahoma, and Texas. The Federal Aviation Administration, Southwest Region, is seeking interested firms in providing this equipment on an as needed basis. This is a total set-aside for small business concerns. No telephone requests. Mail request to DOT/Federal Aviation Administration, Attn: Rose Marie Mendoza, Fort Worth, Texas 76193-0055. Specification Requirements: (1) Shelf Assembly with Backplane and Alarm. High density 4-channel card shelf. Able to accommodate four radio channels and channel controllers. Equipped with a Fuse/Alarm module. Each radio channel must have an independent fuse. Upon fuse failure, fuse alarm must be signalled on fuse/alarm module. Backplane must contain terminal block connections and provide distribution fusing for modules plugged into shelf. Specifications: Height: able to accommodate plug-in modules described in items # 2, 3, and 4 below; Width: 19 inches; Depth: 10 inches; Weight: not more than 15 lbs; Temperature: 32-122 degrees F; Humidity: 0 to 95%, no condensation. (2) Data Above Voice Module. Able to transmit and receive eight independent data channels plus voice over a single 4-wire voice-grade transmission link. Must be able to operate with either an analog or digital 4-wire transmission facility having a bandwidth of at least 300 to 3000 Hz. Must be able to control transmit keying and main/standby changeover for a single radio channel. All necessary commands and status conditions must be sent and received over the single 4-wire transmission link. Module must have adjustment for VF levels of at least -16 dBm to +7 dBm, center tapped transformers with 600 ohm balanced inputs and outputs, a safety circuit which prevents data from going to an active state during error conditions, an FSK enable/disable switch, active filtering, visual indicators to display the status of transmit and receive data channels, error and carrier visual indicators, and front panel jacks and potentiometers. Specifications: Input voltage: -21 to -28 Vdc; Input current: not more than 110mA; XMT/RCV line drop impedance: 600 ohm nominal, balanced; Voice levels: XMT drop/line, RCV drop/line: -16 dBm to +7 dBm (but no more than 6 dB above XMT drop level); Receive equalization: up to 10 dB from 300 Hz to 3400 Hz; VF frequency response: 300 to 2400 Hz +/- 2 dB; FSK signaling tones: 2800, 3000 Hz - 20 dBmO; Receive VF signaling tone rejection: not less than 50 dB; VF noise: not more than 20 dBrnC; VF distortion: not more than 1%; Data propagation delay: not more than 55 ms average; Data inputs: ground active, open idle; Current drain: not more than 145 mA for -24 Vdc; Size: standard US telecommunications ``400'' size; Weight: not more than 0.75 lb; Temperature: 32-122 degrees F; Humidity: 0 to 95%, no condensation. (3) Local Channel Controller. Able to control Main/Standby selection of both UHF and VHF transmitters and receivers. These transmitters and receivers are FAA owned Grim Air/Ground radios model # GRT-21, 22, GRR-23, 24. This module will be located at the controlling site, not at the remote radio site. Must contain a voice operated switch circuit to reduce the level of idle channel background noise when there is no receive activity. This circuit must have an average holdover of 2 seconds, an audio response of 100 - 400 Hz +/-0.1 dB, and a maximum level of +20 dBm. Must operate from a -24 Vdc supply and must slide into card shelf listed in item #1 above. Must have monitoring and alarm indications for both the out-bound and in-bound channel links. Specifications: Input voltage: -24 Vdc +/- 20%; Current consumption: not more than 200 mA; Push to talk inputs: contact closure required, 30 mA max.; Size: standard US telecommunications ``400'' size; Weight: not more than 1 lb; Temperature: 32-122 degrees F; Humidity: 0 - 95%, no condensation. (4) Remote Channel Controller. Able to provide the interface between signals transmitted from the controlling site (the control module listed in item 3 above) and the Main and Standby transmitters and receivers for both VHF and UHF of a single Air/Ground radio (existing FAA equipment manufactured by Grim model #GRT 21, 22, GRR 23, 24). This module is co-located at the remote site with the remote radios. Must also permit control of Main/Standby selections to be taken locally, at this module. Must be able to feed back to the controlling site the selections in use, error conditions and Push-To-Talk confirmation signal, via the channel link. Specifications: Input voltage: -24 Vdc +/- 20%; Current consumption: min. 35 mA, max. 160 mA with all relays active; Transmit attenuation: 0 to 6 dB; Receive attenuation: 0 to 6 dB; Frequency response: 300-4,000 Hz +/-0.5 dB; Max signal out: +7 dB; Audio inputs/outputs: 600 ohm; PTT and coax control relay contacts: 1A max at 110 Vac; Size: standard US telecommunications ``400'' size; Weight: less than 1 lb; Temperature: 32-122 degrees F; Humidity: 0 - 95%, no condensation. (5) Power Supply/Alarm Monitor. Able to provide -24 Vdc power from an input of 115 Vac, 60 Hz. Must have two power supply modules internally connected to form a dual redundant configuration. Each module must be separately alarmed and capable of powering an eight channel radio system. Must include two separate ON/OFF switches with indicators, status LED's for each -24 Vdc supply, an audible alarm signaling device with cut-off switch and visual indicators for power supply alarm, fuse alarm and channel alarm. Specifications: Power input: 105-127 Vac, 60 Hz, 1 A; Power output: -24 Vdc; Height: not more than 8 inches; Width: 19 inches; Depth: 7.5 inches; Temperature: 32-122 degrees F; Humidity: 0 to 95%, no condensation. (6) Extender Card. Passive test device to allow the module under test to be fully accessible. Must slide into the card cage listed in item #1 above and connect the module under test to the backplane of the card cage. Specifications: Height: able to fit into card cage listed in item #1 above; Width: not more than 2 inches; Depth: not more than 10 inches, not less than 7 inches; Weight: not more than 0.5 lb; Temperature: 32-122 degrees F; Humidity: 0 to 95%, no condensation. The Standard Industrial Classification Code for this procurement is 3663. For Minority, Women-Owned and Disadvantaged Business Enterprises: The Department of Transportation (DOT) Office of Small and Disadvantaged Business Utilization (OSDBU), has programs to assist minority, women-owned and disadvantaged business enterprises to acquire short-term working capital and bonding assistance for transportation-related contracts. This is applicable to any eligible prime or subcontract at any tier. The DOT Bonding Assistance Program enables firms to apply for bid, performance and payment bonds up to $1.0 million per contract. The DOT provides an 80 percent guaranty on the bond amount to a surety against losses. Loans are also available under the DOT Short Term Lending Program (STLP) at prime interest rates to provide accounts receivable financing. The maximum line of credit is $500,000. For further information and applicable forms concerning Bonding Assistance Program and/or the STLP, please call the OSDBU at (800) 532-1169. (121)

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