Accession Number : AD0751263

Title :   Non-Blocking UHF Communications System (BASECOM).

Descriptive Note : Final technical rept. Mar 71-Mar 72,

Corporate Author : LITTON SYSTEMS INC MELVILLE N Y LITCOM DIV

Personal Author(s) : Anderson,Tore N. ; Sheets,William

Report Date : OCT 1972

Pagination or Media Count : 64

Abstract : S, MULTIPLE OPERATIONINTERMODULATIONThe report describes the design, construction, and test of a non-blocking UHF communications terminal. The terminal consists of four transmitters and four receivers contained in a single 19-inch rack enclosure. The unique design of the terminal allows operation of the transmitters and receivers on adjacent 50-kilohertz channels anywhere in the 406-megahertz (MHz) to 420 MHz frequency band without mutual interference. This is accomplished through the use of spectrally pure transmitters and extremely low intermodulation receivers in a four-channel concept using a common receiver front end. A manually adjustable interference cancellation network is used to optimize system performance. The system uses a single high gain, omi-directional antenna for both transmit and receive. (Author)

Descriptors :   (*COMMUNICATION AND RADIO SYSTEMS, ULTRAHIGH FREQUENCY), RADIOFREQUENCY INTERFERENCE, MODULATION, RADIO EQUIPMENT, OMNIDIRECTIONAL ANTENNAS, MULTIPLE OPERATION

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE