Friday, September 4, 2009

Satellite TV and its future

Satellite TV and its future Satellite television is television delivered by way of communications satellites in orbit 37,000 kilometers above the earth's surface. The first signal of satellite television has been transmitted to Europe by the Telstar satellite in North America in 1962. The first domestic satellite to North America Canada TV Anik 1, which began in 1973.Satellite television and other communications by satellite, starts with a transmitting antenna located in a facility uplink. Uplink antennas are directed toward the satellite that their signals are transmitted, and are very large, as from 9 to 12 meters (30 to 40 feet) in diameter. The increased diameter results in more accurate positioning and improved signal reception from the satellite. The signal is transmitted to devices located on board the satellite called transponders, which retransmit the satellite signal to Earth to a satellite signal frequency.The different, quite weak after traveling through space, is collected by a parabolic receiving antenna, which reflects the weak signal to the antenna and the focal point receives, down-converted to a lower frequency band and amplified by a device called a low-noise block converter or LNB (Direct broadcast satellite dishes use an LNBF, which integrates with the power ho LNB). A new type of satellite antenna, which does not use a directed parabolic dish and can be used in a mobile platform as a vehicle, was recently announced by the University of Waterloo.   The signal, amplified now travels to a satellite receiver via coaxial cable (RG-6 or RG-10, can not be standard RG-59) and becomes a local oscillator in L-Band frequency range (approx.). Special on-board electronics in harmony to help the receiver of the signal and then converts it to a frequency that a rule can use.Types satellite TelevisionThere are two main types of satellite TV distribution: 1. Direct transmission via satellite (DBS) 2. Television receive only (Tvro). Tvro? Receive OnlyTVRO television via satellite was the first system available for home viewing of satellite TV. We need a big dish of 3 to 6 meters in diameter and has worked on C-Band. Frequencies of around 4 G Hertz are called C-band and require more food because the wavelength of these frequencies is longer than in Ku band, which requires a small dish of about 18 inches. Ku band is 12 to 14 G Hertz.TVRO mobile systems also need a dish, because it needs to have all the channels of many satellites. C-band satellites far fewer channels available for Ku-band satellites and more satellites are needed to provide adequate channels. With the possibility of systems Tvro can also receive free channels and news channels, these companies. It could, for example, to receive the unpublished material that is sent by a press conference somewhere in the crew of the satellite coverage area. That transmit their materials to their headquarters through a satellite band C. Many of these types of channels are encrypted and not available to everyone with the proper equipment.TVRO systems are often called the Big Dish TV, TV and C Band BUD (Big Ugly Dish). DBS - Direct Broadcast TV via DBS SatelliteSatellite is Ku-band. These satellites work at higher frequencies and can transmit signals of higher power. This means that much smaller dishes can be used to receive the signal. A small dish of 18 inches is sufficient to receive all the satellite TV satellite TV. This allows you to have satellite TV in an apartment on the 10th floor, if you have a clear line of sight to south.DBS is for everyone. The antenna is so small that it is not an obstacle, such as with the dishes Tvro 3 to 6 feet. Once installed the dish needs no maintenance since it is directed to a single satellite. Some dishes were 2 or more channels that can receive signals from more than 1 satellite.There no free channels available on DBS satellites, which are often owned and used by the provider of satellite TV is free, while Tvro satellites are often used by those who rent space on the satellite for a limited time. Tvro systems are designed, for example, transport of new material between continents but also within continent.DBS half the world with a simple, low cost of installation of the system. Often the installation is free, because it is really easy to do. All you need is some 'knowledge of where to find the satellite and the instruments that make this even easier. The installer is the satellite and the peak for the reception of satellite TV in minutes.When first hit the market in which the dishes were expensive metal units that took a lot of space on the patio. In these early years, only the detention of supporters of the TV to go through all the expense and trouble of bringing their own dish. Satellite TV is much more difficult than broadcast and cable TV.Today, you see compact satellite dishes perched on rooftops all over the United States. Drive through rural areas beyond the reach of cable and businesses are located in almost all the dishes at home. The major satellite TV companies in what are always more customers with the charm of the film, sports and news from around the world.   TV SolutionSatellite television solves the problems of range and distortion by transmitting broadcast signals from satellites orbiting the Earth. Since satellites are high in the sky, there are many more customers online site. Satellite television systems transmit and receive radio signals using specialized antennas called satellite dishes.The all satellites in Geosynchronous orbit, which means that your stay in one place in the sky relative to Earth. Each satellite was launched into space for about 7,000 km / h, reaching about 22,200 miles above the Earth. At this speed and altitude, the satellite will revolve around the planet every 24 hours - the same length of time necessary to complete a land full of rotation. In other words, the satellite keeps pace with our moving planet exactly. In this way, is simply the antenna via satellite once, and then takes the signal without adjustment, at least when everything works right.At heart, this is all that is on TV via satellite. However, as we shall see in the next paragraph, there are many important steps between the source of original programming and its television.Future satellite TVThis article can be considered science fiction as Arthur C. Clark, who once had a vision about 3 scientific satellites in orbit around the Earth in geostationary orbit for global communications. Everything in this article is nothing more than a science and an extrapolation of current technologies in future.What would be the future of TV? This may seem like a difficult question, but extrapolating what we know the past to the future and some guesswork, which can end up with a picture of what the future of satellite TV is like. The future of satellite television will be guided by these properties: receive and transmit   Size and cost of equipment   Satellite capacity and coverage   Antenna Size   New TechnologiesABOUT LA AUTHORHi! I am Mirza Mohd Ali Baig a Seo Professional India. Writing articles for the sake of fun and you can see my article on my website and the quality here

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