Spectrum analyzer capable of displaying signals obtained during a specified period by means of continuous sweep
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United States of America Patent
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Nov 10, 1992
Grant Date -
N/A
app pub date -
Sep 21, 1989
filing date -
Sep 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spectrum analyzer comprising various components. In the analyzer, a high-frequency signal processing circuit frequency-converts an object signal including waves recurring for a short period of time, into an intermediate-frequency signal, by using a local oscillation signal swept continuously over a desired range of frequencies, and thereby outputs a frequency spectrum of the object signal. A demodulator demodulates the frequency spectrum output by the high-frequency signal processing circuit. A selection signal supplying section supplies a selection signal for selecting that portion of the spectrum output by the demodulator, which lies waves to be analyzed. A control section outputs said portion of the spectrum output by the demodulator, in accordance with the selection signal output from the selection signal supplying section. A display displays the frequency spectrum output by the control section. A sweep control section causes the high-frequency signal processing circuit to sweep the local oscillation signal repeatedly, each time for a period which is not an integral multiple of the cycle period of the selection signal.
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