AFFTC/PKAB, Attn: D. Connally, Directorate of Contracting, 5 S. Wolfe Avenue, Edwards AFB CA 93524-1185

58 -- HIGH FREQUENCY AIRBORNE RADIOS SOL F04611-96-R-0011 DUE 020596 POC Debra Connally, Contract Negotiator, (805) 277-3900 Ext. 2227; or John Adair, Contracting Officer, (805) 277-3900 Ext. 2230. The Air Force Flight Test Center (AFFTC) has a requirement for airworthy High Frequency (HF) Radio Systems for the Advanced Range Instrumentation Aircraft (ARIA). The ARIA fleet consists of three EC-18B and two EC-135E model aircraft. The AFFTC anticipates buying a maximum of 20 systems, with the first four (4) systems ordered in 1996. These systems shall be commercially available with minor development being allowed in the area of interface with existing ARIA systems. The required HF Radio Systems will serve to provide voice communications aboard the ARIA to ground, sea, or other airborne stations during worldwide operations. The normal operating mode will be single sideband. Each aircraft will be configured with various combinations of hardware to provide options for redundancy, frequency diversity, and simultaneous use of multiple worldwide communication networks. Experience with the existing ARIA HF Radio Systems has indicated that as a minimum the following characteristics are necessary to meet AFFTC requirements: 1) 1000 Watt Peak Envelope Power transmitter, Continuous Commercial Service, 2) Solid state technology, 3) Independent transmitter/receiver pairs to provide full duplex or half duplex operations, 4) Input audio level for full power output shall be 0 dBm referenced at 600 ohms, 5) Bandwidth of the audio channel of 300 Hz to 3 kHz, 6) Frequency range of 2 Mhz to 29.9999 MHz in 0.1 kHz steps, 7) Operating modes of upper sideband, lower sideband, independent sideband and amplitude modulation and 8) Receiver audio outputs of +10 dBm in all operating modes . Provisions for depot level maintenance support and training are highly desirable. Maintenance support concepts will include detailed troubleshooting, repair and retest of failed units at the contractor's facility. Training technicians at various levels will be considered to include areas of preventive maintenance, system and module removal/replacement, and component removal/replacement. Each HF Radio System shall include a receiver/exciter pair, power amplifier and power supply, required filters, requied mounting fixtures and/or brackets to install all equipment into standard 19 inch equipment racks. Each system shall also interface with existing antenna couplers and coupler controls and will be required to interface with the aircraft interphone system through an audio patch panel. Operator controls shall be remotely monitored and controlled, and shall include but not be limited to: selection of operating frequency, RF power output, variable receiver RF gain, operating mode, audio gain, receiver and transmitter power on/off, squelch control and squelch bypass. Operator indicators may include but not be limited to: forward and reflected power output of the HF power amplifiers, and system status and health indicators. The HF Radio system and all of its component units shall operate in an airborne environment over a temperature range of at least 0 to 50C without special heaters, cooling, or installation/handling procedures and shall have a non-operating outside air temperature range from -40C to +85C. The system shall operate in humidity up to 95 percent relative, and at pressure altitudes of at least 15,000 feet. The system will have to meet certain airworthiness requirements and shall be designed and tested for functional and crash hazards of flight test equipment. The system shall operate with the available three phase ''Y'' aircraft power with an input voltage of 120 volts AC plus or minus 10 volts AC, and a frequency of 400 Hz plus or minus 20 Hz. Also, the aircraft power provides a low current DC voltage that ranges from 26 to 29 volts DC for system operation. Numbered Note 12 applies to this acquisition. All responsible sources will be considered. Submit a written request for the solicitation to Debra Connally at the address provided above. No telephone requests will be accepted. (0346)

Loren Data Corp. http://www.ld.com (SYN# 0199 19951213\58-0001.SOL)