Accession Number : AD0698083

Title :   DEVICE FOR THE SPECTRAL ANALYSIS OF A SUBSONIC PROCESS,

Corporate Author : ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER WASHINGTON D C

Personal Author(s) : Kaduk,V. G. ; Skripnik,Yu. A. ; Krukovskii-Sinevich,K. B.

Report Date : 19 NOV 1969

Pagination or Media Count : 6

Abstract : The invention concerns a measuring technique and in particular a filterless analyzer of electrical oscillations with an absolutely constant transmission band. The purposed device for the spectral analysis of a subsonic process is distinguished from known devices by the fact that in it the frequency-converted voltage to be studied and the reference voltage are fed alternately with the low frequency to the input of the orthogonal converter supplied by the reference sinusoidal voltage using commutators. This is achieved by the corresponding switching of the commutator. Measurement is made by compensation method with high accuracy. Returning the frequency of the pulse modulator in the measuring process makes it possible to apply quadrature splitting of the reference voltage or the orthogonal converters and thus avoid the effect of phase shifts of the harmonic components on the measurement accuracy. The advantage of this device is the small measuring time, the simplicity and ease of measurement, and the high measurement accuracy, determined basically by the error in the attenuator and the stability of the voltage level of the heterodyne. (Author)

Descriptors :   (*AUDIO FREQUENCY, *SPECTRUM ANALYZERS), OSCILLATION, ELECTRONIC COMMUTATORS, USSR, PATENTS

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE