Modulation monitoring apparatus

Details Modulation monitoring apparatus Modulation monitoring apparatus

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

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