Frequency spectrum analyzer

Details Frequency spectrum analyzer Frequency spectrum analyzer

1994-02-01

1995-05-30

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 7624, 324 7638, 324 7647, 324 7628, 364576, 364577, G01R 2302, G01R 23165

Patent

active

054205018

ABSTRACT:
A frequency spectrum analyzer wherein an input signal is subjected to A/D conversion, and the converted data is multiplied by a window function; and the thus processed signal is subjected to Discrete Fourier Transform; when a user specifies a desired frequency, the square root of the sum of the squares of amplitudes of a predetermined number m of spectral lines close to the frequency is calculated; and the calculated value is outputted as a Root-Mean-Square value (RMS) of the amplitude of the spectrum of the frequency.

REFERENCES:
patent: 3243703 (1966-03-01), Wood
patent: 3439269 (1969-04-01), Fuchs
patent: 3881097 (1975-04-01), Lehmann
patent: 3984669 (1976-10-01), Lehmann
patent: 5075619 (1991-12-01), Said
patent: 5168215 (1992-12-01), Puzzo

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