Omni-frequency pilot system

Details Omni-frequency pilot system Omni-frequency pilot system

1975-12-29

1977-07-05

Pitts, Harold I.

179 15BP, 325 49, 325 50, 325 63, 325329, H04B 162

Patent

active

040342964

ABSTRACT:
A mixer connected to receive a pilot signal from a suppressed carrier communications system and further connected to receive a signal from a crystal controlled oscillator with a plug-in crystal is disclosed. The output of the mixer is coupled through a very narrow bandpass filter tuned to pass only the converted pilot frequency. The output of the mixer develops a control signal which is coupled to a regulating input of variable gain amplifier means for regulating the gain of the amplifier means in direct proportion to changes in level of the pilot.

REFERENCES:
patent: 2699494 (1955-01-01), Albricht
patent: 3003036 (1961-10-01), Greefkes
patent: 3084328 (1963-04-01), Groeneveld
patent: 3300720 (1967-01-01), Kowols

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