RF Modulator

Details RF Modulator RF Modulator

1982-07-01

1985-02-19

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358181, 358186, 455 67, 455226, 455300, H04N 718

Patent

active

045009201

ABSTRACT:
In furnishing an RF modulator with a reference signal generator for generating a specified test signal, and a switching circuit for switching a video signal and the test signal on occasion; the reference signal generator and the switching circuit are received in a shield case of the RF modulator, thereby to prevent radiated interferences.

REFERENCES:
patent: 2913577 (1959-11-01), Johnson
patent: 3775554 (1973-11-01), Hjortzberg
patent: 3775555 (1973-11-01), Carlson
patent: 4158857 (1979-06-01), Hiraguri
patent: 4213152 (1980-07-01), Kakinuma
patent: 4214258 (1980-07-01), van der Valk
patent: 4214360 (1980-07-01), Tuma et al.
patent: 4386377 (1983-05-01), Hunter

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