Abstract: The invention is directed to an improved scrambler capable of self-calibrating output signals. In one embodiment, the scrambler provides an encoded signal along separate signal pulses. A portion of one signal is made to correspond to a portion of another signal to thereby self-calibrate the signals. Also, portions of the incoming video signal are forced to correspond with internally generated voltage level signals.

Abstract: Off premises cable television interdiction apparatus comprises a microprocessor actuation and control means for actuating and controlling one or more frequency agile voltage controlled oscillators. The voltage controlled oscillators selectively jam only unauthorized premium programming transmitted in the clear from a headend to a particular subscriber. Each voltage controlled oscillator is allocated a continuous band of frequencies consistent with the elimination of jamming signal frequency harmonics which may disturb authorized programming at a higher channel frequency. The microprocessor actuation and control means provides a calibration mode and a normal mode of operation. The method of interdiction comprises the steps of generating and storing voltage control words for operating the oscillators consistent with a head end selected jamming factor for a particular channel to be jammed and addressably transmitted and stored premium programming authorization data.

Abstract: Equipment for use in CATV lines and a system for distribution of CATV signals and for power to operate CATV line equipment having active devices which require power is described. The system distributes CATV signals to subscribers who have ordered different levels of service (basic service without premium channels or different groups of premium channels). Housings are located in proximity to the premises of both actual subscribers and potential subscribers, and have like covers which contain tapping electronics (a directional coupler, line equalizers and power bypassing circuit). The cover has ports at opposite ends and an additional port at one end. The tapping electronics is located on a seizure board having seizure blocks spaced from each other along one edge of the board. The seizure board is rotatable ninety degrees (90.degree.