Cable TV

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Cable TV Cable television is a system of providing television programs to consumers via radio frequency (RF) signals transmitted to televisions through coaxial cablesor digital light pulses through fixed optical fibers located on the subscriber's property, much like the over-the-air method used in traditional broadcast television(via radio waves) in which a television antenna is required. FM radio programming, high-speed Internet, telephony, and similar non-television services may also be provided. The major difference is the change of radio frequency signals used and optical connections to the subscriber property. Most American television sets are cable-ready and have a cable television tuner capable of receiving cable TV already built-in that is delivered as an analog signal (UK televisions are set up to receive Freeview digital terrestrial broadcasting). To obtain premium television most televisions require a set top box called a cable converter that processes digital signals. The majority of basic cable channels can be received without a converter or digital television adapter that the cable companies usually charge for, by connecting the copper wire with the F connector to the Ant In that is located on the back of the television set. The abbreviation CATV is often used to mean "Cable TV". It originally stood for Community Antenna Television, from cable television's origins in 1948: in areas where Over-theair reception was limited by distance from transmitters or mountainous terrain, large "community antennas" were constructed, and cable was run from them to individual homes. The origins of cable broadcasting are even older as radio programming was distributed by cable in some European cities as far back as 1924.

Philippines ³NUVUE´, the first cable television system, was set up in Baguio City spearheaded by American expatriate Russel Swartley in 1969. Popularity of CATV started in the 1980s after the Marcos administration. Cable giant SkyCable started in 1992. Cable providers have grown, and these some examples are Global Destiny, Cablelink, and some regional cable providers. In 2007, SkyCable introduced the DigiBox, a cable TV set top box that provides a digital television (Digital television) (DTV) signal for higher video quality and prevents illegal cable TV connections. In 2008, SkyCable also broadcast the 37th Ryder Cup in High-definition television (HDTV). In 2009, SkyCable became the first cable TV service provider in the Philippines to broadcast the UAAP Games in HDTV via the new SkyHD Cable TV service. Digital cable In 1989, General Instrument (which was later acquired by Motorola) demonstrated that it was possible to convert an analog cable signal to digital and transmit it in a standard 6-MHz television channel. In the 1990s cable providers began to invest heavily in new digital based distribution systems. Increased competition and programming choices from Direct-broadcast satellite services such as DirecTV,Dish Network, and PrimeStar caused cable providers to seek new ways to provide more programming. Customers were increasingly interested in more channels, pay-per-view programming, digital music services, and high speed internet services. By 2000, most cable providers in the US were offering some form of digital services to their customers.

Digital cable technology has allowed cable providers to compress video channels so that they take up less frequency space and to offer various two-way communication capabilities. This has enabled digital cable providers to offer more channels, video on demand services (without use of a telephone line), telephone services, high speed internet services, and interactive television services. In addition, digital cable technology allows for error correction to ensure the quality of the received signal and uses a secure digital distribution system (i.e. a secure encrypted signal to prevent eavesdropping and theft of service) Most digital cable providers use QAM for video services and DOCSIS standards for data services. Some providers have also begun to roll out video services using IPTV or Switched video. How Cable works In the 1950s, there were four television networks in the United States. Because of the frequencies allotted to television, the signals could only be received in a "line of sight" from the transmitting antenna. People living in remote areas, especially remote mountainous areas, couldn't see the programs that were already becoming an important part of U.S. culture. In 1948, people living in remote valleys in Pennsylvania solved their reception problems by putting antennas on hills and running cables to their houses. These days, the same technology once used by remote hamlets and select cities allows viewers all over the country to access a wide variety of programs and channels that meet their individual needs and desires. By the early 1990s, cable television had reached nearly half the homes in the United States. Today, U.S. cable systems deliver hundreds of channels to some 60 million homes, while also providing a growing number of people with high-speed Internet access. Some cable systems even let you make telephone calls and receive new programming technologies! In this article, we'll show you how cable television brings you so much information and such a wide range of programs, from educational to inspirational to just plain odd. The earliest cable systems were, in effect, strategically placed antennas with very long cables connecting them to subscribers' television sets. Because the signal from the antenna became weaker as it traveled through the length of cable, cable providers had to insert amplifiers at regular intervals to boost the strength of the signal and make it acceptable for viewing. According to Bill Wall, technical director for subscriber networks at ScientificAtlanta, a leading maker of equipment for cable television systems, limitations in these amplifiers were a significant issue for cable system designers in the next three decades. "In a cable system, the signal might have gone through 30 or 40 amplifiers before reaching your house, one every 1,000 feet or so," Wall says. "With each amplifier, you would get noise and distortion. Plus, if one of the amplifiers failed, you lost the picture. Cable got a reputation for not having the best quality picture and for not being reliable." In the late 1970s, cable television would find a solution to the amplifier problem. By then, they had also developed technology that allowed them to add more programming to cable service.

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