Turkey the Republic of Turkey, is a transcontinental country located in Western Asia, with a smaller portion on the Balkan Peninsula in Southeast Europe. East Thrace, located in Europe, is separated from Anatolia by the Sea of Marmara, the Bosphorous strait and the Dardanelles. Turkey is bordered by Bulgaria to its northwest. Istanbul is the largest city. 70 to 80 per cent of the country's citizens identify as Turkish. Kurds are the largest minority. At various points in its history, the region has been inhabited by diverse civilizations including the Assyrians, Thracians, Phrygians and Armenians. Hellenization continued into the Byzantine era; the Seljuk Turks began migrating into the area in the 11th century, their victory over the Byzantines at the Battle of Manzikert in 1071 symbolizes the start and foundation of Turkey. The Seljuk Sultanate of Rûm ruled Anatolia until the Mongol invasion in 1243, when it disintegrated into small Turkish principalities. Beginning in the late 13th-century, the Ottomans started uniting these Turkish principalities.
After Mehmed II conquered Constantinople in 1453, Ottoman expansion continued under Selim I. During the reign of Suleiman the Magnificent the Ottoman Empire encompassed much of Southeast Europe, West Asia and North Africa and became a world power. In the following centuries the state entered a period of decline with a gradual loss of territories and wars. In an effort to consolidate the weakening social and political foundations of the empire, Mahmut II started a period of modernisation in the early 19th century, bringing reforms in all areas of the state including the military and bureaucracy along with the emancipation of all citizens. In 1913, a coup d'état put the country under the control of the Three Pashas. During World War I, the Ottoman government committed genocides against its Armenian and Pontic Greek subjects. Following the war, the conglomeration of territories and peoples that comprised the Ottoman Empire was partitioned into several new states; the Turkish War of Independence, initiated by Mustafa Kemal Atatürk and his colleagues against occupying Allied Powers, resulted in the abolition of monarchy in 1922 and the establishment of the Republic of Turkey in 1923, with Atatürk as its first president.
Atatürk enacted numerous reforms, many of which incorporated various aspects of Western thought and customs into the new form of Turkish government. The Kurdish–Turkish conflict, an armed conflict between the Republic of Turkey and Kurdish insurgents, has been active since 1984 in the southeast of the country. Various Kurdish groups demand separation from Turkey to create an independent Kurdistan or to have autonomy and greater political and cultural rights for Kurds in Turkey. Turkey is a charter member of the UN, an early member of NATO, the IMF and the World Bank, a founding member of the OECD, OSCE, BSEC, OIC and G-20. After becoming one of the first members of the Council of Europe in 1949, Turkey became an associate member of the EEC in 1963, joined the EU Customs Union in 1995 and started accession negotiations with the European Union in 2005 which have been stopped by the EU in 2017 due to "Turkey's path toward autocratic rule". Turkey's economy and diplomatic initiatives led to its recognition as a regional power while its location has given it geopolitical and strategic importance throughout history.
Turkey is a secular, unitary parliamentary republic which adopted a presidential system with a referendum in 2017. Turkey's current administration headed by president Recep Tayyip Erdoğan of the AKP has enacted measures to increase the influence of Islam, undermine Kemalist policies and freedom of the press; the English name of Turkey means "land of the Turks". Middle English usage of Turkye is evidenced in an early work by Chaucer called The Book of the Duchess; the phrase land of Torke is used in the 15th-century Digby Mysteries. Usages can be found in the Dunbar poems, the 16th century Manipulus Vocabulorum and Francis Bacon's Sylva Sylvarum; the modern spelling "Turkey" dates back to at least 1719. The Turkish name Türkiye was adopted in 1923 under the influence of European usage; the Anatolian peninsula, comprising most of modern Turkey, is one of the oldest permanently settled regions in the world. Various ancient Anatolian populations have lived in Anatolia, from at least the Neolithic period until the Hellenistic period.
Many of these peoples spoke the Anatolian languages, a branch of the larger Indo-European language family. In fact, given the antiquity of the Indo-European Hittite and Luwian languages, some scholars have proposed Anatolia as the hypothetical centre from which the Indo-European languages radiated; the European part of Turkey, called Eastern Thrace, has been inhabited since at least forty thousand years ago, is known to have been in the Neolithic era by about 6000 BC. Göbekli Tepe is the site of the oldest known man-made religious structure, a temple dating to circa 10,000 BC, while Çatalhöyük is a large Neolithic and Chalcolithic settlement in southern Anatolia, which existed from approximately
Cable television is a system of delivering television programming to consumers via radio frequency signals transmitted through coaxial cables, or in more recent systems, light pulses through fiber-optic cables. This contrasts with broadcast television, in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television. FM radio programming, high-speed Internet, telephone services, similar non-television services may be provided through these cables. Analog television was standard in the 20th century, but since the 2000s, cable systems have been upgraded to digital cable operation. A "cable channel" is a television network available via cable television; when available through satellite television, including direct broadcast satellite providers such as DirecTV, Dish Network and Sky, as well as via IPTV providers such as Verizon FIOS and AT&T U-verse is referred to as a "satellite channel". Alternative terms include "non-broadcast channel" or "programming service", the latter being used in legal contexts.
Examples of cable/satellite channels/cable networks available in many countries are HBO, Cinemax, MTV, Cartoon Network, AXN, E!, FX, Discovery Channel, Canal+, Fox Sports, Disney Channel, Nickelodeon, CNN International, ESPN. The abbreviation CATV is used for cable television, it stood for Community Access Television or Community Antenna Television, from cable television's origins in 1948. In areas where over-the-air TV reception was limited by distance from transmitters or mountainous terrain, large "community antennas" were constructed, cable was run from them to individual homes; the origins of cable broadcasting for radio are older as radio programming was distributed by cable in some European cities as far back as 1924. To receive cable television at a given location, cable distribution lines must be available on the local utility poles or underground utility lines. Coaxial cable brings the signal to the customer's building through a service drop, an overhead or underground cable. If the subscriber's building does not have a cable service drop, the cable company will install one.
The standard cable used in the U. S. is RG-6, which has a 75 ohm impedance, connects with a type F connector. The cable company's portion of the wiring ends at a distribution box on the building exterior, built-in cable wiring in the walls distributes the signal to jacks in different rooms to which televisions are connected. Multiple cables to different rooms are split off the incoming cable with a small device called a splitter. There are two standards for cable television. All cable companies in the United States have switched to or are in the course of switching to digital cable television since it was first introduced in the late 1990s. Most cable companies require a set-top box or a slot on one's TV set for conditional access module cards to view their cable channels on newer televisions with digital cable QAM tuners, because most digital cable channels are now encrypted, or "scrambled", to reduce cable service theft. A cable from the jack in the wall is attached to the input of the box, an output cable from the box is attached to the television the RF-IN or composite input on older TVs.
Since the set-top box only decodes the single channel, being watched, each television in the house requires a separate box. Some unencrypted channels traditional over-the-air broadcast networks, can be displayed without a receiver box; the cable company will provide set top boxes based on the level of service a customer purchases, from basic set top boxes with a standard definition picture connected through the standard coaxial connection on the TV, to high-definition wireless DVR receivers connected via HDMI or component. Older analog television sets are "cable ready" and can receive the old analog cable without a set-top box. To receive digital cable channels on an analog television set unencrypted ones, requires a different type of box, a digital television adapter supplied by the cable company. A new distribution method that takes advantage of the low cost high quality DVB distribution to residential areas, uses TV gateways to convert the DVB-C, DVB-C2 stream to IP for distribution of TV over IP network in the home.
In the most common system, multiple television channels are distributed to subscriber residences through a coaxial cable, which comes from a trunkline supported on utility poles originating at the cable company's local distribution facility, called the "headend". Many channels can be transmitted through one coaxial cable by a technique called frequency division multiplexing. At the headend, each television channel is translated to a different frequency. By giving each channel a different frequency "slot" on the cable, the separate television signals do not interfere with each other. At an outdoor cable box on the subscriber's residence the company's service drop cable is connected to cables distributing the signal to different rooms in the building. At each television, the subscriber's television or a set-top box provided by the cable company translates the desired channel back to its original frequency, it is displayed onscreen. Due to widespread cable theft in earlier analog systems, the signals are encrypted on m
Europe is a continent located in the Northern Hemisphere and in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west and the Mediterranean Sea to the south, it comprises the westernmost part of Eurasia. Since around 1850, Europe is most considered to be separated from Asia by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas and the waterways of the Turkish Straits. Although the term "continent" implies physical geography, the land border is somewhat arbitrary and has been redefined several times since its first conception in classical antiquity; the division of Eurasia into two continents reflects East-West cultural and ethnic differences which vary on a spectrum rather than with a sharp dividing line. The geographic border does not follow political boundaries, with Turkey and Kazakhstan being transcontinental countries. A strict application of the Caucasus Mountains boundary places two comparatively small countries and Georgia, in both continents.
Europe covers 2 % of the Earth's surface. Politically, Europe is divided into about fifty sovereign states of which the Russian Federation is the largest and most populous, spanning 39% of the continent and comprising 15% of its population. Europe had a total population of about 741 million as of 2016; the European climate is affected by warm Atlantic currents that temper winters and summers on much of the continent at latitudes along which the climate in Asia and North America is severe. Further from the sea, seasonal differences are more noticeable than close to the coast. Europe, in particular ancient Greece, was the birthplace of Western civilization; the fall of the Western Roman Empire in 476 AD and the subsequent Migration Period marked the end of ancient history and the beginning of the Middle Ages. Renaissance humanism, exploration and science led to the modern era. Since the Age of Discovery started by Portugal and Spain, Europe played a predominant role in global affairs. Between the 16th and 20th centuries, European powers controlled at various times the Americas all of Africa and Oceania and the majority of Asia.
The Age of Enlightenment, the subsequent French Revolution and the Napoleonic Wars shaped the continent culturally and economically from the end of the 17th century until the first half of the 19th century. The Industrial Revolution, which began in Great Britain at the end of the 18th century, gave rise to radical economic and social change in Western Europe and the wider world. Both world wars took place for the most part in Europe, contributing to a decline in Western European dominance in world affairs by the mid-20th century as the Soviet Union and the United States took prominence. During the Cold War, Europe was divided along the Iron Curtain between NATO in the West and the Warsaw Pact in the East, until the revolutions of 1989 and fall of the Berlin Wall. In 1949 the Council of Europe was founded, following a speech by Sir Winston Churchill, with the idea of unifying Europe to achieve common goals, it includes all European states except for Belarus and Vatican City. Further European integration by some states led to the formation of the European Union, a separate political entity that lies between a confederation and a federation.
The EU originated in Western Europe but has been expanding eastward since the fall of the Soviet Union in 1991. The currency of most countries of the European Union, the euro, is the most used among Europeans. In classical Greek mythology, Europa was a Phoenician princess; the word Europe is derived from her name. The name contains the elements εὐρύς, "wide, broad" and ὤψ "eye, countenance", hence their composite Eurṓpē would mean "wide-gazing" or "broad of aspect". Broad has been an epithet of Earth herself in the reconstructed Proto-Indo-European religion and the poetry devoted to it. There have been attempts to connect Eurṓpē to a Semitic term for "west", this being either Akkadian erebu meaning "to go down, set" or Phoenician'ereb "evening, west", at the origin of Arabic Maghreb and Hebrew ma'arav. Michael A. Barry, professor in Princeton University's Near Eastern Studies Department, finds the mention of the word Ereb on an Assyrian stele with the meaning of "night, sunset", in opposition to Asu " sunrise", i.e. Asia.
The same naming motive according to "cartographic convention" appears in Greek Ἀνατολή. Martin Litchfield West stated that "phonologically, the match between Europa's name and any form of the Semitic word is poor." Next to these hypotheses there is a Proto-Indo-European root *h1regʷos, meaning "darkness", which produced Greek Erebus. Most major world languages use words derived from Europa to refer to the continent. Chinese, for example, uses the word Ōuzhōu. In some Turkic languages the Persian name Frangistan is used casually in referring to much of Europe, besides official names such as Avrupa or Evropa; the prevalent definition of Europe as a geographical term has been in use since the mid-19th century. Europe is taken to be bounded by large bodies of water
Eircom Limited, trading as eir, is a fixed and broadband telecommunications company in Ireland, a former state-owned monopoly, incorporated in Jersey. It is the largest telecommunications operator in the Republic, with a division to service the business and corporate telecom markets in Northern Ireland and Britain; as Bord Telecom Éireann, the company was state-owned until 1999, when it was floated on the Irish and New York Stock Exchanges. Eir operates the fixed-line telephone network, an LTE, HSDPA and GSM/EDGE mobile telephone network eir Mobile and acts as an internet service provider eircom.net. As of Q1 2013, Eircom had 54% market share of fixed voice lines. By late 2007 Eircom added their 500,000th DSL subscriber but broadband share may have fallen to 44% due to growth of fixed wireless and fibre services, its main competitors are Virgin Media Ireland, Vodafone Ireland, Imagine Communications and Magnet Networks and Smart Telecom, with a mix of LLU/GLUMP from Eircom and fibre. Eir operates the largest fixed-line telecommunications network in the Republic of Ireland, under licence from the Commission for Communications Regulation.
Most homes and businesses in the state are dependent on their network. A range of telecommunications services is provided on the network including Business IP, its MPLS platform. Eir have completed a wholly owned fibre network ring around Northern Ireland and another around Belfast, their ISP division, eir Net, provides dial-up services, as well as broadband services. Any alarm-monitoring products using SMS are "hardcoded" to work with eir's SMSC, so will not work on Digiweb, BT, Smart, UPC or Magnet phone networks. DECT SMS handsets are preprogrammed for eir's SMSC. Any competing phone service, not just carrier pre-selection of eir must provide their own SMSC, but when they do, consumers may be unable to migrate from eir due to SMSC numbers in equipment that cannot be reprogrammed.eir's mobile arm, EirMobile, provides a full range of HSPA and GSM-based mobile communication services throughout the Republic of Ireland. Its GSM network operates at 1800 MHz and 900 MHz ranges, as the earlier GSM licences utilised the 900 MHz band.
GPRS and EDGE data services are available. EirMobile provide both bill-pay and pre-pay plans and has 19% of the Irish mobile market, with 1,032,000 cellular subscribers on the EirMobile network; the company has used EDGE technology on its network and has received a 3G license, formally removed from eir's competitor, Smart Telecom. As an operator with significant market power, eir is required to provide a number of wholesale products to other operators and to switch calls onto other phone networks. Many broadband products offered by other operators are resales of the eir product. A series of telephone directories is distributed annually to all households in the Republic of Ireland. An online version is available; the six annual directories list numbers in the local dialling area, regardless of whether the telephone service to the number is provided by eir or by one of its competitors. Mobile numbers are not listed. ComReg has designated eir as the organisation that has the obligation to provide a National Directory Database and a Universal White Pages directory.
The company was formed in 1984 as Bord Telecom Éireann, under the Posts and Telecommunications Act 1983. From 1991 to 2013, eir's subsidiaries included Phonewatch known as Eircom Phonewatch, which provides home monitoring services, monitored burglar-alarms, fire alarms, CCTV systems, medical alert devices. In May 2013, it announced that Phonewatch had been sold to Oslo-based company, Sector Alarm Corporation. From 1999 to 2006 sponsored RTE Weather and from 2000 to 2008, Eircom sponsored the League of Ireland. Although EU laws required the opening of the Irish telecommunications market, Ireland had a derogation from competition until 2003. Telecom Éireann was privatised, this was controversial and subject to much debate; the process began in 1995, by July 1999 the government had disposed of all of its shareholding. Eircom plc was floated on the Irish and New York Stock Exchanges on 8 July 1999, small/first-time investors were encouraged by the Irish Government to buy shares; the share price was set at €3.90 reaching a high of €4.80, a 23% increase.
Those initial investors who held onto their shares, until July 2000, received a 4% bonus-share allocation. The Eircom flotation is considered to have been an example of a stock market bubble — after the initial hype of the flotation died down, the stock price fell rapidly. Many of the 500,000 small investors were angered by the significant financial loss they incurred, blaming the government for not sufficiently warning them of the risks inherent in stock-market investment. Since privatisation, eir's penetration of landlines has fallen from 82% to 69%. During this period, there has been a large increase in mobile phone ownership and a significant rise in line rental to the highest in Europe. In 2001, Eircom sold its mobile subsidiary Eircell to Vodafone; the company was transferred to a separate ent
BeIN Sports is a global network of sports channels owned and operated by beIN Media Group. Its Chairman is Nasser Al-Khelaifi, its CEO is Yousef Al-Obaidly. BeIN operates channels in the Middle East & North Africa, Spain, United States, Australia, New Zealand, Hong Kong, Malaysia, Indonesia and Thailand. In France, where beIN Sports was launched for the first time, it holds the rights to broadcast major football tournaments, including Ligue 1, La Liga, Serie A, Bundesliga and the European Football Championship. In Spain operated by Mediapro, holds the rights to La Liga, Ligue 1 and Serie A, from July 2015. In the United States and Canada, beIN Sports holds the rights to broadcast La Liga, Ligue 1, Copa del Rey, CONMEBOL World Cup Qualifiers, Copa Libertadores and Football League Championship matches and Real Madrid TV, in addition to the major motorcycle road racing championships, it launched two channels in the United States, in August 2012, followed by a full channel in Canada, on 31 January 2014.
In Indonesia, beIN Sports holds the rights to broadcast La Liga, Ligue 1, Serie A, Football League Championship, Football League Cup, Süper Lig, A-League, FFA Cup, Superliga Argentina, Copa Argentina, KNVB Cup, CAF World Cup Qualifiers, UEFA Champions League, UEFA Europa League, Major League Soccer, with MP & Silva partnership broadcasting Premier League until 2019, in addition to the major racing championships (DTM and World Rally Championship and more. In Malaysia, beIN Sports offers comprehensive coverage of European Football Leagues including La Liga, Ligue 1 and more. In Hong Kong, beIN Sports holds the rights to broadcast Serie A, Ligue 1, Major League Soccer, Football League Championship, Football League Cup, A-League, FFA Cup, Superliga Argentina, Copa Argentina, KNVB Cup, UEFA Champions League,UEFA Europa League and more. In Thailand, beIN Sports holds the rights to broadcast Premier League, La Liga, Serie A, Ligue 1, MLS, UEFA Champions League, UEFA Europa League, Süper Lig, A-League, FFA Cup, Superliga Argentina, Copa Argentina, KNVB Cup and more.
In Australia, the channel was launched in late November 2014, following the acquisition of Setanta Sports Australia, rebranded as beIN Sports. BeIN Sports Australia holds the rights to broadcast UEFA Champions League, UEFA Europa League, EFL Cup, La Liga, Serie A, Ligue 1, Bundesliga, MLS, Copa Libertadores and RBS Six Nations. On 14 March 2016, beIN Sports Australia expanded from one to three channels, all in HD, as of 15 May 2016 has been made available to all Foxtel sport pack subscribers, rather than the original add-on cost for a single SD channel. Fetch subscribers still only have access to beIN Sports 1, an add-on cost each month. BeIN Connect known as beIN Sports Connect, is a subsidiary over-the-top content service started in 2014, it allows users to watch live and on-demand video content from a Mac, Windows PC, mobile phone, Xbox 360, Xbox One, PlayStation 3 or PlayStation 4 via a broadband or Wi-Fi internet connection. On-demand content comprises sports highlights, TV shows. BeIN CONNECT is available as a paid service in France, United States, Turkey, Asia-Pacific and the MENA region.
Al Jazeera Media Network entered the European television rights market in June 2011 when it purchased a package of live French football Ligue 1 matches from 2012 to 2016 for €90 million a year. The deal makes them joint broadcasters of domestic top-flight football in France alongside long-term rights holders Canal+; the broadcaster acquired the pay-TV rights to the UEFA Champions League, Europa League from 2012 to 2015, Euro 2012 and Euro 2016 in France. France was targeted as Al Jazeera's first entry into Europe due to the fact that there were no dedicated sports channels, unlike in the United Kingdom; the name "beIN Sports" was first revealed in early 2012. According to Nasser Al-Khelaifi, the director of Al Jazeera Sports, the name "symbolises the mind of two channels aiming at bringing live and exclusive broadcasting of the biggest events." Former Canal+ executive Charles Bietry was hired by Al Jazeera to launch the channels. The channels will select satellite providers. CanalSat – owned by Canal+ Group – has declined to carry the channels as of March 2012.beIN Sports 1 was launched on June 1, 2012 in time to broadcast Euro 2012.
BeIN Sports 2 commenced on July 27, 2012 in time to broadcast the French Ligue 2 season, before the start of the 2012–13 Ligue 1 season. In June 2015, it was announced that Nasser Al-Khelaifi had plans to create the beIN Sports channel on TV operators to cable in BrazilbeIN Sports Spain began broadcasting on 1 July 2015, the date on which Gol Televisión ceased broadcasting all football games, which during the summer were in place under the slogan "Change the game", "Cambia el juego" in Spanish. Thanks to an alliance between Al Jazeera and Mediapro, beIN Sports Spain offers UEFA Champions League, UEFA Europe League, UEFA Super Cup, Premier Le
Television, sometimes shortened to tele or telly, is a telecommunication medium used for transmitting moving images in monochrome, or in color, in two or three dimensions and sound. The term can refer to a television set, a television program, or the medium of television transmission. Television is a mass medium for advertising and news. Television became available in crude experimental forms in the late 1920s, but it would still be several years before the new technology would be marketed to consumers. After World War II, an improved form of black-and-white TV broadcasting became popular in the United States and Britain, television sets became commonplace in homes and institutions. During the 1950s, television was the primary medium for influencing public opinion. In the mid-1960s, color broadcasting was introduced in most other developed countries; the availability of multiple types of archival storage media such as Betamax, VHS tape, local disks, DVDs, flash drives, high-definition Blu-ray Discs, cloud digital video recorders has enabled viewers to watch pre-recorded material—such as movies—at home on their own time schedule.
For many reasons the convenience of remote retrieval, the storage of television and video programming now occurs on the cloud. At the end of the first decade of the 2000s, digital television transmissions increased in popularity. Another development was the move from standard-definition television to high-definition television, which provides a resolution, higher. HDTV may be transmitted in various formats: 1080p, 720p. Since 2010, with the invention of smart television, Internet television has increased the availability of television programs and movies via the Internet through streaming video services such as Netflix, Amazon Video, iPlayer and Hulu. In 2013, 79 % of the world's households owned; the replacement of early bulky, high-voltage cathode ray tube screen displays with compact, energy-efficient, flat-panel alternative technologies such as LCDs, OLED displays, plasma displays was a hardware revolution that began with computer monitors in the late 1990s. Most TV sets sold in the 2000s were flat-panel LEDs.
Major manufacturers announced the discontinuation of CRT, DLP, fluorescent-backlit LCDs by the mid-2010s. In the near future, LEDs are expected to be replaced by OLEDs. Major manufacturers have announced that they will produce smart TVs in the mid-2010s. Smart TVs with integrated Internet and Web 2.0 functions became the dominant form of television by the late 2010s. Television signals were distributed only as terrestrial television using high-powered radio-frequency transmitters to broadcast the signal to individual television receivers. Alternatively television signals are distributed by coaxial cable or optical fiber, satellite systems and, since the 2000s via the Internet; until the early 2000s, these were transmitted as analog signals, but a transition to digital television is expected to be completed worldwide by the late 2010s. A standard television set is composed of multiple internal electronic circuits, including a tuner for receiving and decoding broadcast signals. A visual display device which lacks a tuner is called a video monitor rather than a television.
The word television comes from Ancient Greek τῆλε, meaning'far', Latin visio, meaning'sight'. The first documented usage of the term dates back to 1900, when the Russian scientist Constantin Perskyi used it in a paper that he presented in French at the 1st International Congress of Electricity, which ran from 18 to 25 August 1900 during the International World Fair in Paris; the Anglicised version of the term is first attested in 1907, when it was still "...a theoretical system to transmit moving images over telegraph or telephone wires". It was "...formed in English or borrowed from French télévision." In the 19th century and early 20th century, other "...proposals for the name of a then-hypothetical technology for sending pictures over distance were telephote and televista." The abbreviation "TV" is from 1948. The use of the term to mean "a television set" dates from 1941; the use of the term to mean "television as a medium" dates from 1927. The slang term "telly" is more common in the UK; the slang term "the tube" or the "boob tube" derives from the bulky cathode ray tube used on most TVs until the advent of flat-screen TVs.
Another slang term for the TV is "idiot box". In the 1940s and throughout the 1950s, during the early rapid growth of television programming and television-set ownership in the United States, another slang term became used in that period and continues to be used today to distinguish productions created for broadcast on television from films developed for presentation in movie theaters; the "small screen", as both a compound adjective and noun, became specific references to television, while the "big screen" was used to identify productions made for theatrical release. Facsimile transmission systems for still photographs pioneered methods of mechanical scanning of images in the early 19th century. Alexander Bain introduced the facsimile machine between 1843 and 1846. Frederick Bakewell demonstrated a working laboratory version in 1851. Willoughby Smith discovered the photoconductivity of the element selenium in 1873; as a 23-year-old German university student, Paul Julius Gottlieb Nipkow proposed and patented the Nipkow disk in 1884.
This was a spinning disk with a spiral pattern of holes in it, so each hole scanned a line of the image. Although he never built a working model
Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location. The signals are received via an outdoor parabolic antenna referred to as a satellite dish and a low-noise block downconverter. A satellite receiver decodes the desired television programme for viewing on a television set. Receivers can be a built-in television tuner. Satellite television provides a wide range of services, it is the only television available in many remote geographic areas without terrestrial television or cable television service. Modern systems signals are relayed from a communications satellite on the Ku band frequencies requiring only a small dish less than a meter in diameter; the first satellite TV systems were an obsolete type now known as television receive-only. These systems received weaker analog signals transmitted in the C-band from FSS type satellites, requiring the use of large 2–3-meter dishes.
These systems were nicknamed "big dish" systems, were more expensive and less popular. Early systems used analog signals, but modern ones use digital signals which allow transmission of the modern television standard high-definition television, due to the improved spectral efficiency of digital broadcasting; as of 2018, Star One C2 from Brazil is the only remaining satellite broadcasting in analog signals, as well as one channel on AMC-11 from the United States. Different receivers are required for the two types; some transmissions and channels are unencrypted and therefore free-to-air or free-to-view, while many other channels are transmitted with encryption, requiring the viewer to subscribe and pay a monthly fee to receive the programming. The satellites used for broadcasting television are in a geostationary orbit 37,000 km above the earth's equator; the advantage of this orbit is that the satellite's orbital period equals the rotation rate of the Earth, so the satellite appears at a fixed position in the sky.
Thus the satellite dish antenna which receives the signal can be aimed permanently at the location of the satellite, does not have to track a moving satellite. A few systems instead use a elliptical orbit with inclination of +/−63.4 degrees and orbital period of about twelve hours, known as a Molniya orbit. Satellite television, like other communications relayed by satellite, starts with a transmitting antenna located at an uplink facility. Uplink satellite dishes are large, as much as 9 to 12 meters in diameter; the increased diameter results in more accurate aiming and increased signal strength at the satellite. The uplink dish is pointed toward a specific satellite and the uplinked signals are transmitted within a specific frequency range, so as to be received by one of the transponders tuned to that frequency range aboard that satellite; the transponder re-transmits the signals back to Earth at a different frequency in the 10.7-12.7 GHz band, but some still transmit in the C-band, Ku-band, or both.
The leg of the signal path from the satellite to the receiving Earth station is called the downlink. A typical satellite has up to 32 Ku-band or 24 C-band transponders, or more for Ku/C hybrid satellites. Typical transponders each have a bandwidth between 50 MHz; each geostationary C-band satellite needs to be spaced 2° longitude from the next satellite to avoid interference. This means that there is an upper limit of 360/2 = 180 geostationary C-band satellites or 360/1 = 360 geostationary Ku-band satellites. C-band transmission is susceptible to terrestrial interference while Ku-band transmission is affected by rain; the latter is more adversely affected by ice crystals in thunder clouds. On occasion, sun outage will occur when the sun lines up directly behind the geostationary satellite to which the receiving antenna is pointed; the downlink satellite signal, quite weak after traveling the great distance, is collected with a parabolic receiving dish, which reflects the weak signal to the dish's focal point.
Mounted on brackets at the dish's focal point is a device called a feedhorn or collector. The feedhorn is a section of waveguide with a flared front-end that gathers the signals at or near the focal point and conducts them to a probe or pickup connected to a low-noise block downconverter; the LNB amplifies the signals and downconverts them to a lower block of intermediate frequencies in the L-band. The original C-band satellite television systems used a low-noise amplifier connected to the feedhorn at the focal point of the dish; the amplified signal, still at the higher microwave frequencies, had to be fed via expensive low-loss 50-ohm impedance gas filled hardline coaxial cable with complex N-connectors to an indoor receiver or, in other designs, a downconverter for downconversion to an intermediate frequency. The channel selection was controlled by a voltage tuned oscillator with the tuning voltage being fed via a separate cable to the headend, but this design evolved. Designs for microstrip-based converters for amateur radio frequencies were adapted for the 4 GHz C-band.
Central to these designs was concept of block downconversion of a range of frequencies to a lower, more handled IF. The advantages of using an LNB are that cheaper cable can be used to connect the indoor receiver to the satellite te