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How does a satellite tv system work?
Satellite TV System
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There are five links in the digital satellite television chain. At the
beginning, there is the satellite providers, who buy the rights to
broadcast other channels and programs through their equipment. A signal
is compressed, usually into an MPEG-2 format (the same as DVD’s), and
transmitted to a satellite orbiting the Earth in geo synchronous orbit,
which in turns transmits the signal to your satellite dish. Due to the
geo synchronous orbit, your satellite dish needs only do be positioned
once, and must face the southern sky in order to pick up a signal. Once
received, the signal is passed to your receiver. This is essentially
security equipment for the satellite channels and providers – as the
signal is digitally encrypted it is very hard to be intercepted by
unauthorized users. The receiver reads the encryption and unpacks the
information. The result is what you see on the screen. Recently a new
wave of satellite TV has been developed, known as HDTV. To receive HDTV,
you will need an HDTV receiver, and ideally an HD television set. HDTV
has far superior sound and vision, and broadcasts in DVD quality
pictures with Dolby Digital 5.1 Surround Sound, bringing the cinema to
your home without a DVD player.
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