Wired program distribution system tamper detector

Details Wired program distribution system tamper detector Wired program distribution system tamper detector

1981-06-25

1984-04-17

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 86, 358115, 361194, 455 4, H04N 716, H01H 900

Patent

active

044438150

ABSTRACT:
A wired program distribution tamper detection circuit useful in CATV including pay T.V. systems which is connected in the subscriber drop cable between the trunk and a subscriber's pay T.V. security device, e.g. descrambler, filter, or converter, or T.V. set and cuts off the program signal in the event the cable is momentarily disconnected as would occur during tampering. The circuit detects an abnormal impedance, in its general form, or the interruption of a d.c. path through the cable, in its preferred embodiment, and inhibits the application of the signal upon such detection. A complaint by the subscriber thus effects an announcement of the tampering.

REFERENCES:
patent: 3244809 (1966-04-01), Fuller et al.
patent: 4002956 (1977-01-01), Minor et al.
patent: 4286288 (1981-08-01), Waldo
patent: 4313132 (1982-01-01), Doles et al.

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