Examine individual changes

''''SMATV''' is Single Master Antenna Television (or Satellite Master Antenna Television),<ref name="ETSI"/> The purpose of SMATV is for supplying and controlling the number and type of channels to multiple televisions.<ref name="VIS"/> Not only TV channels but FM channels as well. It provides Reception of [[Direct broadcast satellite|DBS]] TV/FM channels for hotels, motels, dormitories, hospitals and commercial properties with multiple tenants, schools. Using a master antenna system video signals, audio signals and decoder signals can also be distributed. It consists of single outdoor unit or antenna feeding to number of indoor units.<ref name="SCDR"/> The channels accessible are independent of other users. For maintaining a good Signal to noise Ratio at all the indoor units served, a larger antenna is required. Antenna with 2 m-3m diameter. A SMATV headend is used to receive and rebroadcast [[Satellite TV]] channels throughout a property from a single satellite feed.<ref name="BaylinBerkoff1992"/> The system consist of Master Antenna , matching transformer to match the balanced antenna with unbalanced cable and amplifiers.<ref name="TEDR"/> Mostly antenna have impedance is around 300 ohm. To convert it to 75 ohm matching Transformer Balun is used. For trunk line isolation , a resistive inductive device known as splitter is used. It amplifier output is fed to splitter through coaxial trunk lines.<ref name="EED"/> There are several methods of distribution that is often used in a SMATV headend including: * [[IPTV]] ([[Internet Protocol]]) TV Systems<ref name="BroeckPierson2008"/> * Com1000 Pro:Idiom Encrypted HD Headend * [[L-Band]] Satellite TV Distribution<ref name="Long1999"/> Two Main approaches for distribution of digital TV signal in SMATV installations: *Transmodulation from satellite Quaternary phase shift keying [[QPSK]] to Quadrature Amplitude Modulation [[QAM]] *Direct Distribution of [[QPSK]]<ref name="ETSI2"/> In the United States the satellite carriers utilized to provide the satellite TV signal for SMATV headend systems are: *[[DIRECTV]] *[[Dish Network]] Smatv ==References== {{reflist|refs= <ref name="ETSI">{{cite book|title=EN 300 473: "Digital Video Broadcasting (DVB); Satellite Master Antenna Television (SMATV) distribution systems"|url=http://www.etsi.org/deliver/etsi_en/300400_300499/300473/01.01.02_60/en_300473v010102p.pdf|isbn=2-7437-1655-X}}</ref> <ref name="VIS">{{cite book|title=View Source vision and security: "Satellite Master Antenna Television System(S.M.A.T.V)|url=http://www.viewsecure.co.uk/smatv.php}}</ref> <ref name="SCDR">{{cite book|author1=Dennis Roddy|title=Satellite Communications|url=http://books.google.com/books?id=_Ef0N-ExWucC|accessdate=29 Nov 2014|isbn=978-0-07-007785-0|pages=569-}}</ref> <ref name="BaylinBerkoff1992">{{cite book|author1=Frank Baylin|author2=Steve Berkoff|title=Wireless cable and SMATV|url=http://books.google.com/books?id=xHfyAAAAMAAJ|accessdate=24 May 2013|date=August 1992|publisher=Baylin Publications|isbn=978-0-917893-17-9}}</ref> <ref name="TEDR">{{cite book|author1=RG Gupta|title=Television Engineering and Video Systems|url=http://books.google.co.in/books?id=P6BlcWaizHUC&pg=PT490|accessdate=29 Nov 2014|isbn=0-07-058596-2}}</ref> <ref name="EED">{{cite book|author1=SK Bhattacharya|title=Electrical Engineering Drawing|url=http://books.google.co.in/books?id=gdsSXU4uF-MC&pg=PA239|accessdate=29 Nov 2014|isbn=81-224-0855-9}}</ref> <ref name="BroeckPierson2008">{{cite book|author1=Wendy Van den Broeck|author2=J. Pierson|title=Digital television in Europe|url=http://books.google.com/books?id=oc2HL71I7EgC&pg=PA241|accessdate=24 May 2013|year=2008|publisher=Asp / Vubpress / Upa|isbn=978-90-5487-541-3|pages=241–}}</ref> <ref name="Long1999">{{cite book|author=Mark Long|title=Digital Satellite Television Handbook|url=http://books.google.com/books?id=L4yQ0iztvQEC&pg=PA165|accessdate=24 May 2013|year=1999|publisher=Newnes|isbn=978-0-7506-7171-2|pages=165–}}</ref> <ref name="ETSI2">{{cite book|title=EN 300 473 V1.1.2: "Digital Video Broadcasting (DVB); Satellite Master Antenna Television (SMATV) distribution systems"|url=http://www.etsi.org/deliver/etsi_en/300400_300499/300473/01.01.02_60/en_300473v010102p.pdf|isbn=2-7437-1655-X}} <ref> }} [[Category:Satellite television]]'