AnswerID: 351669 Submitted: Sunday, Mar 01, 2009 at 14:16
timglobal
replied:
Hi Phil,
The Receiver unit is, on most mobile sat systems, simply that. Some pay-per-view systems require a return path, but most mobile sat systems can't do this.
To answer your question how it knows to activate, it works on an encrypted hotlist.
Receiver knows "who" it is and can read what card is in it. It receives a list of cards and their activation status via carrier signal from the sat transmitter.
The receiver reads this list on power-up and activates (or deactivates) the card and related channel access. So no transmission is required.
The system isn't foolproof against fraud, but works pretty well.
Cheers,
Tim
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