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Direct Broadcast Satellite ABC

Direct Broadcast Satellite (DBS) TV service is a high-powered broadcast service to homes using satellites as the primary form of signal transmission. Its high transmission power makes possible use of relatively small dish antennas for efficient signal reception and utilization. Commercial satellite TV, as we know it, is a DBS service.

Satellite TV works as a simple triangular scheme. The uplink station collects signals from various content providers (HBO, ESPN, Discovery, local providers, etc.), transforms it into high-frequency signal and emits to TV satellites orbiting the Earth. The satellites then send downlink signal back to Earth through electronic devices at the satellite called transponders. Single satellite can have up to four dozen transponders, each capable of transmitting up to a dozen TV channels. It adds up to a few hundreds of channels transmission capacity per single satellite possible.

Due to the very high altitude - 22.236  miles - TV satellite can cover much larger ground area - so called footprint -than a ground based antenna. Signal from the satellite is picked up by a small satellite dish antenna mounted at the subscriber's residence. Filtered and amplified, the signal is then sent to the satellite TV receiver, where it gets decoded, transformed radio-wave to a "usable" electrical form, and fed to the TV set, becoming a video/audio stream.

Originally, DBS frequency of choice was the high-powered Ku-band. However, the need for expanded programming resulted in use of other frequencies: the lower-power Ku-band's FSS frequencies, as well as lower-power C-band FSS frequency, and higher-frequency Ka-band. Use of lower-powered emissions resulted in the increase of the minimum dish size needed for efficient reception.

Good signal reception requires no obstruction between the satellite and dish receptor: the dish must have clear "view" of the satellite. Quality of reception also depends on the receiver position within the "footprint" (the signal is strongest in the center and weakens toward the periphery), position of the satellite (the higher it is in the sky, the better) and weather conditions (heavy rains or snow can affect signal quality).

    Of course, for good signal reception, satellite dish has to be accurately pointed, with all the wiring and connections properly installed and in good order.

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Home  Remember those happy days with no cable television, no satellite TV? Only a single analog TV service available, and everything about getting and using it was as simple as: get it, click, go...

Cable or satellite TV?  Which one is better: satellite TV or cable? In most any comparison, the answer seems to depend on whom you ask...

Cable TV  Cable TV is how the television entered American homes. In its early stages, cable TV service was quite different from the modern cable TV we know now...

Direct Broadcast Satellite  Direct Broadcast Satellite (DBS) TV service is a high-powered broadcast service to homes using satellites as the primary form of signal transmission. Its high transmission power makes possible use of relatively small dish antennas for efficient signal reception and utilization. Commercial satellite TV, as we know it, is a DBS service...

Dish Network  Dish Network is the second largest direct broadcast satellite (DBS) service provider in the US. Together with DirecTV, it shares the US home satellite TV market. Dish Network started commercial DBS broadcasting  in 1996, after its first TV satellite - EchoStar I - has been launched in 1995...

DirecTV  DirecTV is a direct broadcast satellite (DBS) service provider, based in Las Vegas, Nevada. Launched in 1994 by Hughes Electronics Corporation, it was the very first high-powered (mini-dish) DBS service in the world...

High-speed INTERNET  Whether you spend many hours browsing the Internet on daily basis, or use it less frequently, high-speed Internet connection appears to be irresistibly convenient. While it comes at added cost, most people find its benefits worth added expense, which can be quite low...

High-definition TV  Are you too mystified and intrigued by this new kid on the TV block: high-definition television. Expectations run high, but so is the uncertainty - what is really different about it, when compared with standard-definition television (SDTV)?...

Satellite Radio  If you like listening to radio programming, satellite radio has some goodies to offer. Great variety of channels, most of them commercial-free, high quality sound when it is needed, possibility to listen to your favored programming wherever you are...

 News Wire  The latest in the satellite/cable industry...
 

 

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