Satellite television | Wikipedia audio article
Channel: wikipedia tts
Date: 17/03/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Satellite_television


00:02:09 1 Technology
00:04:33 1.1 Sun outage
00:18:05 2 Uses
00:18:45 2.1 Direct broadcast via satellite
00:18:55 2.2 Television receive-only
00:23:00 3 History
00:25:25 3.1 Early history
00:25:34 3.2 Beginning of the satellite TV industry, 1976–1980
00:28:22 3.3 TVRO/C-band satellite era, 1980–1986
00:31:16 3.4 1990s to present
00:36:05 4 See also
00:42:59 5 References



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SUMMARY
=======
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 commonly referred to as a satellite dish and a low-noise block downconverter.
A satellite receiver then decodes the desired television programme for viewing on a television set. Receivers can be external set-top boxes, or a built-in television tuner. Satellite television provides a wide range of channels and services. It is usually 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 (12–18 GHz) 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 (4–8 GHz) from FSS type satellites, requiring the use of large 2–3-meter dishes. Consequently, these systems were nicknamed "big dish" systems, and 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 significantly 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 (C-SPAN) 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 (pay television), requiring the viewer to subscribe and pay a monthly fee to receive the programming.