The Amazing Technology Of Consumer Satellite TV

Scientific types may want to turn away. This is a very short, yet interesting, explanation of how does satellite TV work. Even though it has become very popular in the last few years, satellite TV has been around for a long time. The first satellite for TV was put into orbit in’62.

Back then people who wanted satellite for their televisions had to use a nine foot dish that they put in their back yards. They were really big, ugly, and gave an incredible variety of channels from other countries that made them totally worth the effort. Some people still have those dishes in their back yards. When somebody wants to get channels from a different country they call the neighbors to help them move the dish a tad. There were remotes included with the dishes but those were lost years ago.

Besides that a person who had one of these dishes was not required to mow about half of the lawn, you had unlimited television channels. Most of the channels came from other countries. This was because no one who owned a dish actually knew where to point it to get specific channels. So, a person in one region could get channels from a country thousands of miles away.

So, as the popularity of satellite televisions grew they started shooting more satellites up that had transponders on them. They called these geostationary satellites because they are orbiting at the same speed as the earth so they aren’t really moving anymore than we are. This made reception easier to achieve and if you knew where a satellite was you could point the nine foot dish at the satellite and watch a different countries stuff. It was still pretty cool.

Cities had a problem because of the size of the satellites. Most city dwellers do not have an area over nine feet in diameter that they can put a big, grey, satellite dish. So, providers came up with an’” dish. These little dishes do everything that the big dishes did. They can be attached to anything and, as long as they are pointing south and are not obstructed, the picture that is received is great.

In cities however, obstruction was a problem and that is how “spot beams” were born. The satellites beam a signal to the spot beam, that beams a signal to the dish, that beams a signal to the receiver. This solved the problem of getting a signal just about anywhere in a metropolitan area easily.

The satellite guys made other advancements too. They learned that by encoding the signals digitally they could cram more channels into the same bandwidth. So there are over 500 channels being shot across the same bandwidth twenty-four hours a day in both HDTV and standard formats.

If you’d like to learn more about how does satellite TV work there are many websites that have all of the scientific information about each part of the system. However, sometimes a short version followed by a satellite broadcast movie is better.

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