CATV subscriber disconnect switch

Details CATV subscriber disconnect switch CATV subscriber disconnect switch

1992-11-12

1994-06-21

Buczinski, Stephen C.

Cryptography

Cryptanalysis

380 10, 380 15, 380 20, 455 1, H04N 7167, H04K 300

Patent

active

053234626

ABSTRACT:
Television service denial apparatus comprises a microprocessor controller for controlling the generation of a control signal waveform. The control signal toggles a program denial device between first and second conditions. The program denial device, responsive to the control signal waveform, only periodically outputs a television signal spectrum to which a sophisticated television receiver be a device having only 20 dB of signal isolation. In one embodiment, the program denial device comprises a signal modulator for modulating an incoming television signal spectrum including one continuous wave carrier channel having no superimposed video. A character generator, responsive to the microprocessor, generates a control signal waveform for controlling the operation of the signal modulator. Consequently, while all television channels are obfuscated by the signal modulator during a period of service denial, the continuous wave carrier is modulated with a message signal for delivering a message to the subscriber on the continuous wave carrier channel indicating why service is disconnected.

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