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Articles & Information about
Satellite tv
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The Satellite TV Solution
Satellite television solves the problems of range and distortion by transmitting broadcast signals from satellites orbiting the Earth. Since satellites are high in the sky, there are a lot more customers in the line of site. Satellite television systems transmit and receive radio signals using specialized antennas called satellite dishes.
Satellites are higher in the sky than TV antennas, so they have a much larger "line of sight" range.
The television satellites are all in geosynchronous orbit, meaning that they stay in one place in the sky relative to the Earth, each satellite is launched into space at about 7,000 mph (11,000 kph), reaching approximately 22,200 miles (35,700 km) above the Earth. At this speed and altitude, the satellite will revolve around the planet once every 24 hours -- the same period of time it takes the Earth to make one full rotation. In other words, the satellite keeps pace with our moving planet exactly. This way, you only have to direct the dish at the satellite once, and from then on it picks up the signal without adjustment, at least when everything works right.
At the core, this is all there is to satellite television, but as we'll see in the next section, there are several important steps between the original programming source and your television.
More interesting information:
The Broadcast TV Problem
How Satellite TV Works
The Components
The Dish
The Receiver
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Satellite TV