Cable TV - Hidden Channels

Some cable systems rely on the fact that they can use frequencies over the cable which are not permitted for over-the-air broadcast use, and which cannot be received on an ordinary receiver. This a cable company might transmit premium programs on a different frequency beloew the normal television band, and provide subscribers to the service with a descrambler, which is just a frequency convertor, which will provide the proper output frequency suitable for use with a normal television receiver. The risk with this method is that viewers may be able to get ahold of multi-band receivers which could tune directly to the cable frequency, thus being able to receive the service.

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