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'''SMATV''' is Single Master Antenna Television (or Satellite Master Antenna Television),<ref name="ETSI"/>
#REDIRECT [[Satellite dish]]
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 broadcasting|FM]] channels as well. It provides Reception of [[Direct broadcast satellite|DBS]] TV/FM channels for hotels, motels, dormitories, schools, hospitals and commercial properties with multiple tenants. 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, typically {{Convert|2|m|ft}} to {{Convert|3|m|ft}} in diameter.

[[File:Fracarro-Portenseigne-Compact-Line-QPSK-Digital-Satellite-x6-Headend-SIG9506UN-Front.jpg|thumb|A QPSK Digital Satellite Headend by Fracarro.]]
A SMATV headend is used to receive and rebroadcast [[satellite television]] channels throughout a property from a single satellite feed.<ref name="BaylinBerkoff1992"/>

The system consists of a master antenna and a matching transformer to match the balanced antenna with unbalanced cable and amplifiers.<ref name="TEDR"/> Most antennas have an impedance of around 300&nbsp;Ω. To convert it to 75&nbsp;Ω, a matching transformer (or [[balun]]) is used. For trunk line isolation, a resistive inductive device known as a [[Power_dividers_and_directional_couplers|splitter]] is used. The amplifier output is fed to the splitter through [[coaxial]] trunk lines.<ref name="EED"/>

There are several methods of distribution that are often used in a SMATV headend. These include:
* [[IPTV]] ([[Internet Protocol]]) TV Systems<ref name="BroeckPierson2008"/>
* COM1000 Pro:Idiom Encrypted HD Headend
* [[L-Band]] Satellite TV Distribution<ref name="Long1999"/>
There are two main approaches for distribution of digital TV signals in SMATV installations:
* Transmodulation from satellite quaternary [[Phase-shift keying|phase shift keying]] [[QPSK]] to quadrature [[amplitude modulation]] [[Quadrature amplitude modulation|QAM]]
* Direct distribution of QPSK<ref name="ETSI2"/>

In the United States, the satellite carriers providing the satellite TV signal for SMATV headend systems are:
*[[DirecTV]]
*[[Dish Network]]

==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=https://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=https://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=https://books.google.com/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=https://books.google.com/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=https://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=https://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]]

Latest revision as of 03:28, 19 August 2023

SMATV is Single Master Antenna Television (or Satellite Master Antenna Television),[1] The purpose of SMATV is for supplying and controlling the number and type of channels to multiple televisions.[2] Not only TV channels but FM channels as well. It provides Reception of DBS TV/FM channels for hotels, motels, dormitories, schools, hospitals and commercial properties with multiple tenants. 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.[3] 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, typically 2 metres (6.6 ft) to 3 metres (9.8 ft) in diameter.

A QPSK Digital Satellite Headend by Fracarro.

A SMATV headend is used to receive and rebroadcast satellite television channels throughout a property from a single satellite feed.[4]

The system consists of a master antenna and a matching transformer to match the balanced antenna with unbalanced cable and amplifiers.[5] Most antennas have an impedance of around 300 Ω. To convert it to 75 Ω, a matching transformer (or balun) is used. For trunk line isolation, a resistive inductive device known as a splitter is used. The amplifier output is fed to the splitter through coaxial trunk lines.[6]

There are several methods of distribution that are often used in a SMATV headend. These include:

There are two main approaches for distribution of digital TV signals in SMATV installations:

In the United States, the satellite carriers providing the satellite TV signal for SMATV headend systems are:

References

[edit]
  1. ^ EN 300 473: "Digital Video Broadcasting (DVB); Satellite Master Antenna Television (SMATV) distribution systems" (PDF). ISBN 2-7437-1655-X.
  2. ^ View Source vision and security: "Satellite Master Antenna Television System(S.M.A.T.V).
  3. ^ Dennis Roddy. Satellite Communications. pp. 569-. ISBN 978-0-07-007785-0. Retrieved 29 Nov 2014.
  4. ^ Frank Baylin; Steve Berkoff (August 1992). Wireless cable and SMATV. Baylin Publications. ISBN 978-0-917893-17-9. Retrieved 24 May 2013.
  5. ^ RG Gupta. Television Engineering and Video Systems. ISBN 0-07-058596-2. Retrieved 29 Nov 2014.
  6. ^ SK Bhattacharya. Electrical Engineering Drawing. ISBN 81-224-0855-9. Retrieved 29 Nov 2014.
  7. ^ Wendy Van den Broeck; J. Pierson (2008). Digital television in Europe. Asp / Vubpress / Upa. pp. 241–. ISBN 978-90-5487-541-3. Retrieved 24 May 2013.
  8. ^ Mark Long (1999). Digital Satellite Television Handbook. Newnes. pp. 165–. ISBN 978-0-7506-7171-2. Retrieved 24 May 2013.
  9. ^ EN 300 473 V1.1.2: "Digital Video Broadcasting (DVB); Satellite Master Antenna Television (SMATV) distribution systems" (PDF). ISBN 2-7437-1655-X.
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