Accession Number : ADA019900

Title :   Radio Set AN/URC-78 ()/(V).

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


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

Report Date : NOV 1975

Pagination or Media Count : 119

Abstract : Optimization of the Phase I design of Radio Set AN/URC-78()/(V) was continued. A 11 MHz monolithic IF system, a premodulation filter, and a post-demodulation filter was constructed as part of an Operational Data System. Experimental models of the receiver r f amplifier, receiver VCO, transmitter VCO, harmonic filters and broadband antenna matching network have been constructed for the 44 MHz to 66 MHz band to support the frequency extension task. Interface systems were designed to provide compatibility with VINSON and the necessary corrections for a TOP-HAT secure transmission device containing VANDAL. A two-way demonstration breadboard for a slow frequency hopping system is approximately 25% completed. A higher power VCO and a pin diode tuned 50 watt filter are circuits under development to reduce transmitter noise.

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

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE