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home>satellite
decoder
The satellite decoder
unscrambles satellite TV signals
The satellite decoder is used by satellite TV
companies to restore intentionally scrambled video signals from
satellites to the original unscrambled form.
The satellite decoder unscrambles the
video signals using the following method:
1. The authorization center creates
the master data stream. This data stream contains a digitally
derived key based upon the serial number of EACH authorized
decoder and a "Tier bit" for EACH channel it is authorized to
receive (determined by PAYING for the service)
2. "SEED KEYS" in the receiver itself
combine with the other half of the key (transmitted by the
authorization center) and create the master key used to decode
the audio and turn on the video descrambling circuit
Once the satellite decoder unscrambles the
signal an access card is then used as a means of providing certain
programming to certain households, depending on what package has
been paid for. The card is known as a "Conditional Access Module,"
or CAM. Each card has a unique identification number (called the
CAM ID) which is how DirecTV can add or remove programming from
each and every individual card.
For more information on the satellite
decoder and the related products and services visit the following
links:
Free Direct TV
Free Satellite Dish
Free Satellite
Receivers
Satellite TV Dealers
Satellite TV Terms
DSL Internet Access
Swap Links
Partner Sites
About The Author:
Heath Allison is a successful author and publisher of
http://www.1st-at-dish-tv.com/. With many years of experience
in the industry, Heath has written many articles on satellite
TV systems and services to educate the consumer.
03-07-03
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