Subscriber control system

Details Subscriber control system Subscriber control system

H - Electricity

03

H

350/24

H03H 7/07 (2006.01) H03H 7/12 (2006.01) H04N 7/16 (2006.01)

Patent

CA 1228152

ABSTRACT OF THE DISCLOSURE An addressable control system which includes an address generator at a head end, generating address control signals fox each of a plurality of remote subscribers, a modulator for modulating a carrier with the address and control sig- nal and coupling it onto cables, circuits at receiving ter- minals for receiving and demodulating the modulated carrier to recover the address signals, address decoding means for each subscriber to decode the address and control signals and circuits responsive to the decoding means to select the channels which each subscriber will receive, and may in- clude a filter including one pole which is fixed at the center frequency to be tuned out and a second variable pole responsive to an input voltage, the second pole adapted to vary in frequency about the first pole. The system also has an encoder for encoding the status of the received sig- nals and a modulator for modulating a return carrier with the encoded states and putting this on the cable so that the signals may be demodulated at the head end. To carry out the demodulating and also to modulate the return sig- nals, a local oscillator and mixer is used which generates both an intermediate frequency for the mixer and a carrier frequency for the return signal.

504433

Affiliated with

Also associated with

Rating

Subscriber control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Subscriber control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subscriber control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1326648