Converter/descrambler

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When a descrambler is added to the Cable Converter Box in the same chassis, it is referred to as a Converter/Descrambler or sometimes a Combination Unit, and is a type of Set-top box, it allows : local broadcast channels, basic cable channels, authorized premium channels, "Pay-Per-View" (PPV), and “Video On Demand” (VOD) services to be viewed. A Combination Converter/Descrambler is generally called a Set-top box or STB it is a single (one-piece) system installed in a single cabinet and represents a single component that is capable of descrambling premium services, like HBO or Showtime, pay-per-view cable channels., Video on Demand, Games or other specialty pay services, and transposes the cable signal for RF output on channel 3 or 4. This unit contains a converter and a descrambler, enclosed in a common box and outputs the signal directly to your TV, VCR, DVR, PC, DVD or video projector.

[edit] References

United States Patent 6070001 Addressability system Patent
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Bartlett, Eugene (1990). Cable Television Technology & Operations -HDTV and NTSC Systems. New York, New York: McGraw-Hill, Inc., 8-9. ISBN 0-07-003957-7.