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Satellite tv or satellite television is television delivered through orbiting communications satellites located 37,000 km above the earth's surface.
cardsharing server - The initial satellite tv signal was relayed from Europe for your Telstar satellite over The united states in 1962. The initial domestic United states of america satellite to carry television was Canada's Anik 1, which has been launched in 1973.
Satellite TV, like other communications relayed by satellite, starts with a transmitting satellite antenna in an uplink facility. Uplink satellite dishes are targeted at the satellite what has signals will probably be transmitted to, and they are large, up to 9 to 12 meters (Thirty to forty feet) in diameter. The greater the dish, the harder accurate positioning and improved signal reception around the satellite. It signals is transmitted to devices located on-board the satellite called transponders, which retransmit the satellite signal back towards the Earth using a different frequency.
The satellite signal, quite weak after traveling through space, is collected with a parabolic receiving dish, which reflects the weak signal for that dish's center point and it is received, down-converted to some lower frequency band and amplified by way of a device known as a low-noise block down converter, or LNB.
A whole new kind of satellite antenna, that won't utilize a directed parabolic dish and can be utilized on a mobile platform say for example a vehicle, was recently announced through the University of Waterloo. On popularly known as car satellite system.
The tv signal, now amplified, travels to some satellite television receiver box through coaxial cable (RG-6 or RG-10; can't be standard RG-59) and is also converted using a local oscillator to the L-band array of frequencies (approximately). Special on-board electronics inside the receiver box help tune the signal then convert it having a frequency a standard television could use.
As you known, tv business in Usa are generally covered with two companies, Dish Network and DirecTV. If you wish to get yourself a satellite television on pc in your house, your options mostly are restricted to the disposable tv packages that made available from each one Dish Network or DirecTV.
This can be a quick take on United states tv industry: Hughes's DirecTV, the first high-powered DBS system, went online in 1994 called the first Us DBS service. In 1996, Echostar's Dish Network went online in the united states and possesses gone to similar success.
Source: http://www.proman-help.isys-informatik.ch/index.php/Benutzer%3AAdellaLozano64
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