Spectrum analyzer

Details Spectrum analyzer Spectrum analyzer

1998-01-26

2000-05-09

Ballato, Josie

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 7623, 324617, 342 20, 73659, H04N 1700

Patent

active

060608781

ABSTRACT:
A spectrum analyzer measures a time difference between two or more signals with different carrier frequencies or a time delay between two or more signals with the same carrier frequency. The spectrum analyzer includes at least two measurement channels, each of the measurement channels has a frequency mixer, a local oscillator and an IF (intermediate frequency) filter for mixing an input signal to be measured with a local signal of the local oscillator to produce an IF signal which passes through the IF filter, and a demodulator provided in one of the measurement channels to demodulate the IF signal produced from the input signal to generate a trigger signal to start an operation of the other measurement channel.

REFERENCES:
patent: 2915897 (1959-12-01), Hoffman
patent: 3110861 (1963-11-01), Hurvitz
patent: 5493209 (1996-02-01), Gumm

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