What is satellite TV and how does satellite TV work?
Satellite TV is a television system whereby a broadcast center sends a program signal to a satellite in a stationary orbit above the earth. The satellite sends the signal back down to earth where it is picked up by a satellite dish, converted to a TV picture by a receiver, and displayed on a TV screen.
What is a TV satellite?
A satellite is a large electronic device that hovers in a stationary orbit 22,300 miles above the earth. It’s function is to capture the signals being broadcast from satellite TV centers and beam them back down to earth.
The reason satellites are necessary for large-scale broadcasts is that satellite TV providers use radio waves to broadcast programs. Radio waves can only travel in a straight line and a satellite TV signal can only be captured by an antenna that’s directly in line with that signal.
A satellite broadcasts a signal from overhead in the sky thereby avoiding buildings, trees, and other obstructions that would block the signal.
What does a satellite TV dish do?
The purpose of a satellite dish is to capture the signal sent to earth from a satellite.
The dish is curved so it can focus the signal on the feed horn that sits in front of the dish. The feed horn sends the signal to an LNB (low noise block) converter which converts the signal and sends it to a receiver.
How do satellite TV receivers work?
The satellite TV receiver is the electronic box that sits next to your TV and allows you to change the satellite TV channels. The receiver decodes the satellite signal, converts it into audio and video signals, then sends it to your TV.
In addition to regular receivers, DISH Network and DIRECTV also have DVR (digital video recorder) receivers that allow you to record your favorite programs, and HDTV receivers that allow you to watch satellite TV in high definition.
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This post was written by LGL_Assistant on February 18, 2012
