Method and apparatus for applying a scanning control signal to a

Details Method and apparatus for applying a scanning control signal to a Method and apparatus for applying a scanning control signal to a

1977-05-09

1979-04-10

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

250199, 250551, 358 86, 358188, H04N 500, H04B 900

Patent

active

041491866

ABSTRACT:
A method and apparatus is described for applying a video composite signal to the antenna input of a television receiver while at the same time electrically isolating such input from the equipment which generates the composite signal. The method includes the step of connecting to the antenna input a modulator for the composite signal having an optical sensor at its input for receiving optical radiation defining the composite signal, and converting the same into an electrical signal providing information to the modulator defining such composite signal. It further includes transmitting to the optical sensor optical radiation defining the desired composite signal. The apparatus includes the combination of an oscillator for generating a carrier signal, a modulator for modulating the carrier signal with a composite signal, and an optical sensor connected to the input of the modulator which receives optical radiation defining the composite signal and converts the same to an electrical control signal for the modulator defining the desired composite signal.

REFERENCES:
patent: 3270131 (1966-08-01), Dinter
patent: 3484548 (1969-12-01), Kowal
patent: 3497616 (1970-02-01), McCown
patent: 3634618 (1972-01-01), VON DER Ohe
patent: 3794841 (1974-02-01), Cosentino
patent: 4054794 (1977-10-01), Laughlin

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