System
While satellite TV may seem like a complicated technology, the system is quite easy to understand when you break it down into its components. Satellite providers transmit their broadcast signal containing all your programming that you love to watch so much. It is received by a satellite in orbit, then broadcast back down to Earth where your satellite dish receives the signal. The signal is converted to a lower frequency and sent to the satellite TV receiver (satellite box) and then on to your TV.
Encryption/Decoding
The satellite TV receiver is responsible for decoding the encrypted satellite signal, processing it and forwarding the video and audio information to the TV. When you subscribe for satellite service, your satellite TV receiver is activated and the decoder chip in the box allows you to receive the package of programming you've subscribed for. The satellite signal is encrypted so that only paying subscribers can receive programming.
Signal Conversion
The satellite receiver also converts the programming signal from the digital format that it is broadcast in to an analog form that the TV is able to pick up and process.
Further Functions
As you know, you use the satellite TV receiver to change channels. In addition to decoding and converting the signal, the satellite receiver also segments the large broadcast signal into the individual channels and then sends just the signal for the channel you've selected to the TV, allowing you to watch the program that you want to see. If you have signed up for a High Definition package your receiver will send an HD signal to your HDTV.
Other Options
If you've ordered a package that includes a Digital Video Recorder, the satellite receiver will contain a built-in DVR allowing you to record programs and pause live programming. If you choose to order on-demand or pay-per-view packages, the satellite TV receiver communicates with the provider's office via telephone line sending information about the programming you've ordered for billing purposes.
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