Telecommunications – Transmitter – Measuring – testing – or monitoring of transmitter
Patent
1979-12-06
1981-05-12
Griffin, Robert L.
Telecommunications
Transmitter
Measuring, testing, or monitoring of transmitter
455 67, 324 77B, 329122, H04B 102
Patent
active
042676002
ABSTRACT:
An apparatus is described for converting the carrier frequency of a moduld signal sampled from the output of an RF transmitter. The conversion provides a replica of the modulated signal at a predetermined center frequency without regard to the selection of a transmitter channel or to the modulation technique used. The replica is presented to a demodulator which provides an information signal suitable for monitoring the quality of modulation of the transmitted signal.
REFERENCES:
patent: 3105193 (1963-09-01), Denton
patent: 3537009 (1970-10-01), Brooks
patent: 3649909 (1972-03-01), Ort
patent: 3736510 (1973-05-01), Wu
patent: 3992670 (1976-11-01), Gittins
Chin Tommy P.
Griffin Robert L.
Johnston Ervin F.
Phillips Thomas M.
Sciascia Richard S.
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