Accession Number : AD0460579
Title : SPECTRUM ANALYZER MYTHS.
Descriptive Note : Technical note,
Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AERONAUTICAL ELECTRONIC AND ELECTR ICAL LAB
Personal Author(s) : Cushman, R. W.
Report Date : 15 FEB 1965
Pagination or Media Count : 38
Abstract : Conventional explanations of spectrum analyzer operation, which are based on mathematical concepts, have led to misconceptions of the physical time domain phenomena involved. This technical note, using a physical approach, describes the transients that pulsed signals produce in spectrum analyzer circuits, and interprets the resulting 'spectrum displays.: By using a narrow-band communications receiver, it is shown that 'spectral lines,' as generally conceived, do not exist physically. The displays are shown to be a measure of transient responses of the spectrum analyzer I-F amplifier, rather than indicators of the frequency distribution of a radar transmitter output. Proper interpretation of spectrum analyzer displays as time domain action provides useful information concerning pulsed radar transmitter performance. (Author)
Descriptors : (*SPECTRUM ANALYZERS, LINE SPECTRA), (*RADAR EQUIPMENT, TEST SETS), PULSE ANALYZERS, NARROWBAND, TRANSIENTS, INTERMEDIATE FREQUENCY AMPLIFIERS.
Distribution Statement : APPROVED FOR PUBLIC RELEASE