Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1978-01-09
1979-04-03
Buczinski, S. C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
325132, 358121, H04N 144
Patent
active
041480643
ABSTRACT:
A circuit for transmitting a jamming signal for disruption of a television signal transmitted along a cable or other guided path toward a television receiver, the circuit having a first oscillator means providing an audio frequency signal which is used to frequency modulate a second oscillator means between the signal video and audio carrier frequencies inclusively and having a third oscillator means providing square-wave horizontal-sweep-frequency signal which is used with an amplitude-modulating means for amplitude-modulating the output of the second oscillator means to produce a jamming signal for directional coupling into the guided path for the purpose disrupting both audio and video content of the television signal.
REFERENCES:
patent: 3347982 (1967-10-01), Bass et al.
patent: 3896262 (1975-07-01), Hudspeth et al.
patent: 4064536 (1977-12-01), Saeki et al.
patent: 4074311 (1978-02-01), Tanner et al.
patent: 4085422 (1978-04-01), Niwata et al.
Buczinski S. C.
GTE Sylvania Incorporated
Lindgren Theodore D.
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