The Amazing Technology Of Consumer Satellite TV
Wednesday, December 21st, 2011There is a long, very scientific answer to the question, how does satellite TV work. There is also a shorter version that is way more interesting. We’re going to go with the shorter version and apologize in advance to the scientific types who will cringe when they read this. As far as most people thinking that dishes are new, well they are not. The first satellite for TV was shot into space in’62.
When it all started there were not a lot of satellites up and most people who wanted to get satellite television had huge gray satellite dishes planted in their back yards. There are still some of these around. They are usually about nine feet in diameter and when somebody wants to move the dish to get a different country’s programs it is a group effort. They originally came with remote controls, but those were lost several years ago so the dish gets turned manually.
At that time, and for several years after, no one who owned the dishes really knew which satellites were plugged into which countries. So, you would move the dish until you picked up a country that looked good and watch it for a few days or months until you moved the dish again. Sometimes you landed on your own country, most times you didn’t. But, it was fun and all countries have unique television programs that aren’t seen in other countries.
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.
Cities had a problem with the little dishes because hardly anybody has an unblocked south view. That’s when they came up with “spot beams.” So, the satellites shoot a signal to the spot beam, that shoots a signal to the dish, that shoots a signal to a television. Okay, it’s way more scientific than that, but this is the short version, and you get the picture.
Because the whole satellite system runs on radio signals, the satellite guys found that it saved a lot of space if they encoded the signals digitally and shot all the channels across the same bandwidth. They now have signals available in both standard and HDTV format going out twenty four hours a day.
So, for unscientific types that were wondering how does satellite TV work, there you have it. A really complex system that works really well.