Automatic tracking signal analyzer

Details Automatic tracking signal analyzer Automatic tracking signal analyzer

1974-05-06

1976-08-31

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 79R, 324 77B, 331 25, G01R 2316, H03B 308

Patent

active

039784037

ABSTRACT:
Method and apparatus for analyzing the harmonic distortion present in an input signal wherein first and second reference signals are generated differing by a small offset frequency. The first reference signal is mixed with the input signal to provide an intermediate carrier signal which is modulated with the second reference signal to provide a measurement carrier signal which in turn is modulated with the input signal to produce an output signal which is filtered to isolate a specific signal. By isolating a specific signal for each harmonic of the input signal to be analyzed, the proportion of each such harmonic is revealed as a percentage of the fundamental harmonic of the input signal.
By adding a tunable oscillator to the apparatus, it may function as a wave analyzer, in which case the specific output signal represents the magnitude of any selected component of the signal to be analyzed.

REFERENCES:
patent: 3310744 (1967-03-01), Miller
patent: 3588730 (1971-06-01), Schreuer
patent: 3611175 (1971-10-01), Boelke
patent: 3621388 (1971-11-01), Davis
patent: 3716785 (1973-02-01), Masters
patent: 3805192 (1974-04-01), Ocnaschek

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