Control signal apparatus for CATV system

Details Control signal apparatus for CATV system Control signal apparatus for CATV system

1976-12-23

1979-02-27

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

325 31, 328 73, 358 84, H04H 102, H04N 710

Patent

active

041421566

ABSTRACT:
In a cable or CATV system consisting of a central station with a television transmitter connected via a television transmission cable to a plurality of remote stations each with a television receiver, there is provided apparatus for signalling between the central and remote stations. The apparatus includes at the central station pulse generating means for transmitting via the cable variable sets of packets of first frequency signals followed by a packet of second frequency signal. Each of the remote stations is assigned a specific set of the first frequency signals. In each remote station the packets of first frequency signals are converted to a set of first pulses and the packet of second frequency signal to a second pulse. Counting means count the first pulses of the set and if the count at the time the second pulse is received agrees with a count assigned to the remote station an indication is given.

REFERENCES:
patent: 3130265 (1964-04-01), Leonard
patent: 3614619 (1971-10-01), Huntsinger
patent: 3757035 (1973-09-01), Sullivan
patent: 3803491 (1974-04-01), Osborn
patent: 3836858 (1974-09-01), Kitano
patent: 3859596 (1975-01-01), Jannery et al.
patent: 3866175 (1975-02-01), Seifert, Jr. et al.
patent: 4012734 (1977-03-01), Jagoda et al.

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