Television signal distribution equipment for a cable network and

Details Television signal distribution equipment for a cable network and Television signal distribution equipment for a cable network and

1980-09-23

1983-08-23

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

331 11, 455 3, 455 6, H04N 710

Patent

active

044007264

ABSTRACT:
A TV distribution equipment includes at least one stabilizer (1) associated with a signal processing circuit (2A) suitable for transmitting TV signals to one channel of a cable TV network. The synchronizing signals in said one channel are subject to interference which may be external (e.g. received on the air from a nearly TV transmitter) or internal (e.g. intermodulation from other signal processing equipments 2B, 2C, 2D). The stabilizer (1) includes a frequency comparator (10) and a phase comparator (28) connected in parallel with their inputs arranged to receive a first signal from the associated signal processing circuit (2A) and a second signal representative of the interfering synchronizing signal. The outputs of the comparators are combined to control the frequency of a local oscillator that governs the synchronizing signals produced by the one processing circuit (2A).

REFERENCES:
patent: 3458823 (1969-07-01), Nordahl
patent: 3639840 (1972-02-01), Shekel et al.

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