Band discriminating method in a receiver

Details Band discriminating method in a receiver Band discriminating method in a receiver

1985-10-01

1987-11-24

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455228, 455315, 342 20, H04B 1700, H04B 126

Patent

active

047094079

ABSTRACT:
A band determining method in which radar signals of first and second frequency bands are received in the upper- and lower-heterodyne reception modes, using a local oscillation signal modulated with a low frequency signal, thus causing the phase relationship between the detected signal and the modulating signal to indicate which band signals are received.

REFERENCES:
patent: 2977465 (1961-03-01), Sanders et al.
patent: 3154741 (1964-10-01), Attwood
patent: 4313216 (1982-01-01), Jaeger et al.
patent: 4581769 (1986-04-01), Grimsley et al.
patent: 4626857 (1986-12-01), Imazeki

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