Accession Number : ADA019899

Title :   Radio Set AN/URC-78 ()/(V).

Descriptive Note : Quarterly rept. 27 Jan-27 Apr 75,


Personal Author(s) : Shelton,Charles T. ; Whitman,Craig L.

Report Date : AUG 1975

Pagination or Media Count : 129

Abstract : Optimization of the Phase I design of Radio Set AN/URC-78()/(V) was initiated. Emphasis is placed on the design of an RT unit having rapid channel change and receive-transmit turn-around, so that an affordable ECOM capability of moderate sophistication can be provided. A single IF bandwidth of 16 kHz using 16 kHz premodulation filtering and 8 kHz post demodulation filtering is shown to be near optimum. A design of the 30-88 MHz frequency range using a receiver IF of 11 MHz is presented. The system configuration have been selected for detailed evaluation of cost and performance trade-offs: (1) optimized Phase I (ADM) approach and (2) common module approach. A synthesizer with fast settling time is described which will provide slow frequency hopping capability. An ECCM system is presented which will provide a signficant degree of ECM protection with a moderate increase in complexity. Implementation of a narrow band filter to reduce transmitter 40-watt amplifier output noise has been analyzed and a tentative design is described.

Descriptors :   *Transmitter receivers, Very high frequency, Frequency modulation, Lightweight, Reliability(Electronics), Manportable equipment, Mobile, Vehicle equipment, Airborne, Secure communications, Data transmission systems, Electronic counter countermeasures, Trade off analyses, Noise(Radio), Radiofrequency filters, Frequency shift keyers

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE