7. The apparatus of claim 6, further comprising means for descrambling a video signal produced when said tuner is tuned to a frequency identified by said stored number.
7. The apparatus of claim 6, further comprising means for descrambling a video signal produced when said tuner is tuned to a frequency identified by said stored number. 8. The apparatus of claim 7, further comprising means for inhibiting descrambling of video signals in the absence of a correspondence between said stored identification number and a received identification number.