Measuring adjacent channel power
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United States of America Patent
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-
Mar 7, 1989
Grant Date -
N/A
app pub date -
Jun 11, 1987
filing date -
Jun 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A signal source from a transmitter is down-converted by being mixed with a locally generated signal so that a desired adjacent channel band is converted to base band and the adjacent channel power measured after filtering by a low pass filter. To eliminate the notch in the filter characteristics that occurs when the power is measured by a.c coupled means, the locally generated signal is modulated or swept around the center of the adjacent channel band.
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