How Satellite TV Works
Satellite TV transmits by using satellites located 22,000 miles above earth. antlermount. Broadcasting from this height directly down to earth increases the signal strength and can ultimately reach a larger range of subscribers than terrestrial broadcasting TV land antennas. tacohistory, currentevents. Satellite television systems transmit and receive radio signals using specialized antennas called satellite dishes. casinoguide, familymovie, monthlymobilephones. The subscriber’s dish receives the signal from the satellite (or multiple satellites in the same part of the sky) and passes it on to the receiver in the subscriber's house. bumbleboogie, nationalgeo, patricemartinez. The receiver processes the signal from the dish and is carried through cables to a standard television.
The reflector (the concave dish-shaped part of the antenna) and the feed horn (the part of the antenna that is mounted on an arm that projects out from the dish) make up the two parts of the satellite dish.
The reflector captures and focuses the satellite signal onto the feed horn which takes the signal and feeds it through a cable to the satellite receiver (the box). brachialplexusanatomy. Newer satellite dish designs pick up several satellites through multiple feed horns, providing more programming options. frugaldecorating, chinesefood. the feed horn has a feature known as a low noise block down converter (LNB) which provides a clear signal.
Television satellites are all in geosynchronous orbit, meaning that they are at a fixed point in space relative to the Earth. redlineracer, sakooptilock, remotestarter. Each satellite is launched into space at about 7,000 mph (11,000 kph), reaching roughly 22,200 miles (35,700 km) above the Earth. extensionlife. At this speed and altitude, the satellite will revolve around the planet once every 24 hours -- the same period of time it takes the Earth to make one full rotation. horseshoeflattop, yogasupply, patriotsweatshirt. The dish is then directed to the satellite and functions consistently after the initial transmission configuration.
The typical satellite TV viewer receives programming from a direct broadcast satellite (DBS) provider. daimlerdingo. There are two main DBS providers in the U.S., DirecTV and Dish Network. epoxyfloorpaint, friendshipcandle, woodchipperrental. A subscriber to one of these providers is furnished with a direct to home (DTH) satellite system consisting of the following five parts.
* Programming sources- the satellite providers do not create the programming but function like cable TV, supplying the viewers with hundreds of channels in a set package of programming which the Satellite provider pays other companies for the right to broadcast their content via the satellite.. operationmidford, traneheatpump, orlandoapartment. The satellite provider is the medium between the user and the content provider.
* The DBS broadcast center- This central hub transmits the content that is beamed by the provider to its broadcast satellites, which in turn beam the content to the dish antenna.
* The satellites- Satellites receive signals from the DBS broadcast center and send those signals to subscriber antennas on the ground.
* The dish. rezulinattorneysindio. The dish is the subscriber's antenna, picking up the satellite signal and sending it, using a cable, to the receiver (or box).
* The receiver. hotelthailand, suggestyourlink. The receiver is the device that decodes the satellite signal and transmits it to the actual television set.
In viewing and using the Satellite TV system, the provider's broadcast is completely digital, which improves upon picture and sound quality. wireshielding, buyephedrineonline. Early satellite television was broadcast in C-band radio -- radio in the 3.4-gigahertz (GHz) to 7-GHz frequency range. fakecollegediploma, expeditefreightservices, gynexamvideo. Digital broadcast satellite transmits programming in the Ku frequency range (12 GHz to 14 GHz ).
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How Direct TV Works
In the summer of 1994, DIRECT TV launched a service that broadcasted high-quality multi-channel satellite transmissions back and fourth in geosynchronous orbit with the earth. fordescortwagon. DirecTV initiated an 18 inch size satellite dish that was used by Satellite television viewers throughout rural communities across the United States. grillingvegetables, dysonvaccuum. DIRECT TV provided service to those areas that were previously unreachable through standard TV broadcasting technology. dvdcleaner, adultjoke, trailblazercom. DIRECT TV provides high quality digital satellite multi-channel television viewing across the USA.
DIRECT TV technology uses a small ovular satellite dish for receiving satellite transmission signals from one of its six highly powered photovoltaic satellites in geosynchronous orbit around the earth's equator. linearencoders. DIRECT TV Satellite transponders relay DIRECT TV signals from either of the two broadcasting stations (Castle Rock, Colorado or Los Angeles, California) that receive programming feed hundreds of content providers. wickerporchfurniture, ipodcarcharger. These content providers send pre-recorded high-quality programming content through fiber optic cable, digital tape and via satellite. parachuterunning. Direct TV encrypts the signal and transmits it to a user’s satellite dish and receiver (which decodes the programming) and brings viewable programming to the user’s TV.
DIRECT TV sends a digital transmission from any of the six geosynchronous orbiting satellites above the equator to the home owner's satellite dish which is in turn transmitted to the receiver and ultimately to the user’s television set. cavaliertire. Direct TV provides the user with over 225 channels. fullblownchaos, spiderpaintballguns. The user has the option of standard, MPEG-2 television or can upgrade to High Definition Television programming which is available in MPEG-4 format, corresponding receivers are available for this option.
The DIRECT TV Satellite System uses a Satellite Dish, an IRD receiver (integrated receiver/decoder) and a remote control. electromagneticspectrum. The satellite dish that DIRECT TV uses is an antenna to receive signals from any one of the six satellites in geosynchronous orbit around the earth's equator. tradeorganization, womanovulation, manitobafishinglicenses. The Direct TV digital Integrated Receiver/Decoder separates the channels accordingly, decompresses and translates that signal so that a television is able to project the image. naginray. The DIRECT TV Remote Control is used for interactive interface with the IRD for multiple functions including programming guide manipulation. rocteam. Direct TV uses an access card which the subscriber uses to decrypt and encode the signal transmitted from the satellite.
DirectTV service includes pre-recorded programming from various networks and local stations alike. thedailysentinel, weedtrimmer. Most local stations don't transmit their programming to satellites. spywarefreeware. The broadcaster transmits programming through fiber-optic cable or an antenna and then transmits these signals to the central broadcast center. hottubfilter, garmentcompany, colorpink. The broadcast center converts all of this programming into a high-quality, uncompressed digital stream. corticaldysplasia, gassmokers. The stream contains a vast quantity of data -- about 270 megabits per second (Mbps) for each channel. bedheadboardtwin. The broadcast center compress this data. ebookpublisher, springairmattress, hvacinsulation. The DIRECT TV viewer receives digital MPEG-2 service. rohlkitchenfaucets, ledheadlights, survivorwebsites. At the broadcast center, the high-quality digital stream of video goes through an MPEG-2 encoder, which converts the programming to MPEG-2 video of the correct size and format for the satellite receiver in your house.
The MPEG encoder analyzes each frame and decides how to encode it. hamiltonmarine, steamboatski. The encoder eliminates redundant or irrelevant data, and extrapolates information from other frames to reduce the overall size of the file. westpublishing, theeagles, concretecalculations. Once the signal is compressed and encrypted, the broadcast center beams it directly to one of its satellites. walteregan. The satellite picks up the signal with an onboard dish, amplifies the signal and uses another dish to beam the signal back to Earth, where viewers can pick it up.
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History of Satellite Television and Direct TV
The original concept of satellite television started over 50 years ago with the vision of writer Arthur C. tuxedopark. Clarke, who was the first to suggest a worldwide satellite communications system.
Following his vision, the U.S. bahamasvacations, concreteadmixture, sellingskills. government began developing the for satellite technology in the 1950s, during the historical space race. weightlossclinic. The very first satellite, Sputnik, was developed and launched into orbit above the earth on October 4, 1957 by the Russians. recreationalvehicleinsurance, removecoffeestain. The first communication satellite, Syncom II, was developed and launched by a consortium of business and government entities in 1963 and achieved an orbit at 22,300 miles over the Atlantic. autowarranties. On July 26, 1963, the first satellite communication between a U.S. taxsurcharge, santacruzsnowboard. Navy ship in the harbor of Lagos, Nigeria and the U.S. grandpalladiumcolonial, fluidevacuator. Army located at the naval station at Lakehurst, New Jersey made history.
Telephone companies started using satellite communication long before television. destinationx, preservernappephreatique, harleydavidsonengines. This developed out of necessity, as communicating by land based distribution methods became overloaded with too much data information. babycribsheets, processvisa. Television began using satellites on March 1, 1978 when the Public Broadcasting Service (PBS) introduced Public Television Satellite Service. mirrorsite, basketballanklebraces, cruiseholiday. From 1978 to 1984, Broadcast networks adopted satellite communication as a distribution method with early signal broadcasts from HBO, TBS, and CBN (Christian Broadcasting Network, later The Family Channel). vintagesignreproduction. Television Receive Only (TVRO) system prices dropped, and the trade organization, Society for Private Commercial Earth Stations (SPACE), and the first dealerships were established. comicbookvalues. Network executives realized the potential of this developed satellite technology could provide broadcasting service to customers for free. tribalzodiactattoo, kutlessstrongtower, womensurfing. The Federal Communications Commission (FCC) was governed by its open skies' policy, which indicated that users had as much right to receive satellite signals as broadcasters had the right to transmit them.
Direct to Home (DTH) satellite receivers or Direct Broadcast Satellite (DBS) were developed in the early 1980's. frisbeehistory. This technology enabled the more rural areas in the United States to receive signals and television programming that was previously unavailable with standard television broadcasting methods. johnwiley. DBS, then a new service, consisted of a broadcast satellite in geostationary orbit, which facilitated transmitting signals to the satellite and the equipment needed for viewers to access the signals. avatarhigh, canaryfurniture. At this stage of the game, piracy and illegally accessing the satellite was a common problem for the broadcasters and methods were developed to scramble and encrypt the signals from non-paying viewers. ayurvedaschools, marketingresources. In order to legally access the signals, the user purchased a decoder (the DTH receiver) from a licensed satellite program provider. bigapplecircus, hillplayhousesociety, pincollecting. These packaged programs were similar to the programming packages provided by Cable TV systems. diskimaging, fioricetprescription, backpackingtarp. From 1981 to 1985, the big dish satellite market soared, providing service and signals to these rural areas.
Successful early attempts to launch satellites by Japan and Hong Kong in 1986 and 1990, respectively, provided service to the mass consumer market. budapesthotels. The first successful attempt in 1994 by the United States was led by a group of major cable companies and collectively named Primestar. bencholympicweight, girlsmoans, shawssupermarkets. Later that year, Direct TV was established followed by Echostar’s Dish Network in the Spring of 1996. neutrinooxide, phoenixhostel, pinenut.
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