Accession Number : AD0422074

Title :   DESIGN PLAN FOR THE CONSTRUCTION OF A CONTINUOUSLY SCANNING ANALYZER,

Corporate Author : NATIONAL CO INC MALDEN MA

Personal Author(s) : Snodgrass, John E.

Report Date : OCT 1963

Pagination or Media Count : 9

Abstract : The work under this contract deals mainly with the study and investigation of the problems of high frequency spectrum activity monitoring and/or search requirements, and the development of techniques to solve these problems. This report covers a portion of the continuously scanning analyzer being constructed for the activity monitor. A future TDR will describe areas not covered in this report. This analyzer operates like a scanning receiver in conjunction with a narrow band IF amplifier to analyze a band of frequencies. However, the analyzer is not limited to the resolution of a panoramic receiver, since it uses the equivalent of a chirp filter instead of a simple narrow band IF filter. The chirp filter is simulated by a stored reference cross-correlator preceded by a digital time compressor. The reference for the cross-correlator is a local oscillator whose sweeping speed is equal to the sweeping speed of the input oscillator times the square of the time compression ratio. (Author)

Descriptors :   (*FREQUENCY ANALYZERS, RADIO SCANNING), (*RADIO RECEIVERS, PANORAMIC SCANNERS), CORRELATORS, RADIOFREQUENCY FILTERS, SAMPLERS, DIGITAL SYSTEMS, SWEEP GENERATORS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE