How does satellite television work?

BelperJon

The TV company transmits the coded signal up to their satellite which then sends it back down, covering a certain area known as a footprint. The customer's dish picks up this signal, routes it to a decoder which in turn feeds it to the TV set. It's basically the same as terrestrial TV except a separate decoded is needed for the satellite system. Sep 18 03, 5:50 AM

_princess_007

Satellite TV works by broadcasting video and audio signals from geostationary satellites to satellite dishes on the Earth's surface. These geostationary satellites orbit the earth in a region of space known as the Clarke Belt, which is approximately 22,300 miles above the equator. Each of these satellites carries a number of transponders. These transponders each carry a signal back to the Earth. These signals are typically on C Band, Ku Band, or Ka Band. The band of a signal describes, in broad terms, the frequency of the signal. After travelling over twenty thousand miles, these signals are received by a satellite dish. This dish can be as small as 18" across, or it can be 9' or larger across. The purpose of the dish is to act as a collector and a reflector. The dish collects the signal and reflects it towards the feedhorn. The feedhorn receives the reflected signal and sends it to the LNB. The LNB amplifies the signal and converts it to a frequency more suitable for transmission over a cable. In satellite terminology, that cable is known as the IFL. The LNB transmits the signal over the IFL to the satellite receiver. The satellite receiver then sends the signal to your television set. http://www.tech-faq.com/satellite-tv.shtml Nov 24 06, 11:29 PM

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