Spectrum analyzer
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United States of America Patent
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-
Jul 7, 1998
Grant Date -
N/A
app pub date -
Dec 31, 1996
filing date -
Jan 16, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The object of a spectrum analyzer of present invention is to increase a frequency stability and SPAN probability. A voltage control oscillator is rendered to a locked state based on a frequency as a reference frequency output from a direct digital synthesizer. Thereafter, the voltage control oscillator performs a sweep operation for a signal output therefrom, based on a frequency error to which a ramp signal is added by an adder, that is, based on the reference frequency output from the direct digital synthesizer.
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