The Tv Dish Network Delivers From Satellites

Broadcast TV was a new phenomenon in the late 1940s

. People watched black-and-white programs on tiny little screens which were surrounded by an enormous box filled with vacuum tubes. No one really foresaw the advent of stationary orbiting broadcast satellites, because no one had yet been to space. After the former Soviet Union launched the first Sputnik in 1957, the space race was on, and with it came satellite communications. The first Telstar signal sent TV signals from Europe to the United States in the early 1960s, a precursor of the TV dish network programming we enjoy today.

Television has been transmitted by satellite since the late 1960s in the United States and the former Soviet Union. It was not until the 1990s, however, that commercial broadcasts became widely and easily available. Prior to that time those who could not receive local channels could subscribe to orbiting broadcasts, but there was no way to hide the enormous antennas. They resembled huge tilted dishes made of unattractive metal mesh, often dwarfing the buildings they served. Users had to manually align them with the signal, often every time they switched channels.

By contrast, today's dishes are a fraction of the size, usually measuring about 18-20" in diameter. They are much smaller than the rooftop antennas of previous years, and can be installed unobtrusively on a balcony or the side of a house. They made economically practical satellite subscription television possible, and today there are over 13 million subscribers. Dish television is especially useful in remote areas lacking other TV services.

This technology is really a modern wonder that most of us take for granted. Today's geosynchronous, or fixed position satellites are operated and maintained by the Echostar Corporation, while the ground installation and subscription services are handled by other companies. They and others like them are able to cover a large portion of the world's land surface. Most nations have access to some form of orbiting broadcasts unless there are economic or political considerations prohibiting it.

This kind of service resembles cable TV in many ways. The biggest difference is that the basic signals come from the fixed location in the sky, not a central cable facility. Programming originates in a center which prepares the signal for uplink. Everything is sent digitally, and encoded so that only subscribers can watch. The orbiter intercepts the signals, and then re-transmits them to individual homes.

Those small metal discs then intercept the broadcast, and send them to a receiver. Resembling a cable box or stereo amplifier in size, those receivers decode the signals into a digital or analog format and send it to the TV set. Customers with a clear sky view no longer need to worry about constant antenna adjustments. Earlier issues with digital broadcasts sometimes required double dishes, but that is no longer the case.

Dish television offers the same premium channels and networks as most cable services. Subscribers have the option of doing their own installation, which can save money. In the past, local TV stations were sometimes not available, but that issue has been solved. The reality is that this kind of program delivery is now comparable to cable, and just as easy to use. For those wanting more choice, TV dish network subscription is a good alternative.

by: Niamh Davis

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