ontracts Projects Division, Building 588, MS32, Naval Air Warfare Center Aircraft Division, Patuxent River, MD 206570-5304

58 -- SOURCES SOUGHT: CONTINUOUS WAVE (DOPPLER) RADAR RECEIVER POC Contract Specialist, J. Larry Mattingly, (301) 862-8119; Contracting Officer, Annette B. Steffen, (301) 342-1844, x178. The purpose of this survey is to solicit potential suppliers with an established product line of radar receivers. The Government's first preference is a commercial-off-the-shelf (COTS) receiver. The Government would also consider a receiver that is a non-developmental item (NDI) in the event that the supplier can meet accelerated delivery schedules. The receiver must be able to withstand a sheltered shipboard environment. The band width of the first IF shall be less than the second IF center frequency. The receiver must down convert a Doppler-shifted transmitter return (fo +/- fd) from X-band to an IF of 9.7 MHz for use with a narrow band signal processor. The electrical power requirements are as follows: Prime Power: 115V, 60Hz, type 1, single phase; Maximum Current: Shall not exceed 2 amperes; Leakage Current: Shall not exceed 5 milliamperes; Overcurrent Protection: fuses or circuit breakers shall be used for prime power overcurrent events exceeding maximum rated current. Receiver Characteristics: The transmit sample input for Local Oscillator Generation shall be: Power:15 dBm +/- 5dB; Frequency: X-band. Receiver 3dB bandwidth: fo -1.5 kHz through -65 kHz maximum, fo + 1.5kHz through 105 kHz maximum, where fo is the X-band transmit sample. Prior to the IF output, the transmit sample frequency (fo) shall be attenuated by 100 dB minimum. The frequencies -1.5 kHz to fo and fo to +1.5 kHz shall be attenuated by 45 dB minimum. Receiver Gain: 75 dB nominal; Sensitivity to Minimum Discernable Signal(MDS): -141 dBm minimum, measured in a 100 Hz bandwidth. Dynamic Range: 122 dB minimum; Linearity: Shall be maintained for an X-band input signal power level of up to -19dBm and shall not begin to compress (1 dB compression) until IF output is +20 dBm. Receiver gain reduction shall be applied (in 10dB steps minimum) as the IF output power approaches +20 dBm. Local Oscillator Reradiation: First and subsequent LO signals at the receiver input port antenna connection shall be less than -70 dBm. Image rejection: The image frequency response from any mixing stage shall be suppressed 35 dB minimum relative to the IF level from that mixing stage. CW EMI Degradation: Interfering signals from adjacent or displaced channels from onboard or nearby illuminators, out of the noise bandwidth, shall not cause saturation for signal levels below -58dBm; Test Signal: A constant 100kHz test signal shall be internally available and be applied at the receiver input at fo +100 kHz and at a level of 49 dB Signal-to-Noise Ratio measured in a 10 Hz bandwidth. This value equates to an IF level of approximately -40 dBm. The test signal will be present whenever the specified transmit sample (fo) is available at the transmit sample input. Interested companies shall submit a written response that describes the following additional factors: capability of its equipment; size, weight, and configuration; technology; reliability; maintainability and lead times for delivery of up to 49 systems. THIS IS NOT A REQUEST FOR PROPOSALS. All responses must be in writing and received no later than 30 days fron the date of publication of this synopsis. Responses should be addressed to: Naval Air Warfare Center Aircraft Division, Attn: J. Larry Mattingly, Contracts Projects Division, Code 2611LM, Villa Road, Building 9, Mailstop 9, St. Inigoes, MD 20684-0010. (0332)

Loren Data Corp. http://www.ld.com (SYN# 0219 19951129\58-0007.SOL)