Method and apparatus for jamming cable television channels

Details Method and apparatus for jamming cable television channels Method and apparatus for jamming cable television channels

H - Electricity

04

N

350/20, 331/34

H04N 7/167 (2006.01) H04N 7/16 (2006.01)

Patent

CA 1324652

ABSTRACT Frequency control of multiple oscillators using a single frequency locked loop is accomplished by a single frequency-control device that is time- shared with a plurality of voltage-controlled oscillators and selectively establishes a "desired" frequency for each oscillator. The output of each oscillator is, in turn, selectively routed to a frequency counter which measures the "actual" frequency of the oscillator. A comparison between the desired frequency and the actual measured frequency for each oscillator is made, and an error voltage developed. This error voltage is routed to the appropriate capacitor, which stores the voltage required to keep the selected oscillator on frequency until the next time it is measured.

609997

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