SMATV

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SMATV, short for 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, usually television channels and FM stations to multiple televisions. [2] 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. Fracarro-Portenseigne-Compact-Line-QPSK-Digital-Satellite-x6-Headend-SIG9506UN-Front.jpg
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

  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). Archived from the original on 2017-02-02. Retrieved 2014-11-29.
  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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