Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-07-11
1985-12-31
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 10, H04N 702
Patent
active
045624690
ABSTRACT:
A video carrier, which is amplitude modulated with a fixed video pattern signal, and sync and blanking signals, is combined with an amplitude modulated I.F. trap frequency signal and supplied to the input of the I.F. stages of a television receiver to cause the video pattern to be displayed on the screen of the receiver, which pattern will exhibit interference until the I.F. trap corresponding to the applied I.F. frequency is set precisely at the applied I.F. frequency.
REFERENCES:
patent: 3984862 (1976-10-01), Volz
Britton Howard W.
Kostak Victor R.
Patnaude Edmond T.
Sencore Inc.
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