Cannabaceae

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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

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  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.
source: Https://en.wikipedia.org/wiki/SMATV

One thought on “Cannabaceae”

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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