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There are a number of competing systems in use. Early adopters used C-band dishes several feet in diameter to receive analog microwave broadcasts, and later digital microwave broadcasts using the 3.7-4.2 GHz band. Today, although large C-band dishes can still receive some content, the 11.7-12.2 GHz K u band is also used.
Typical transponders each have a bandwidth between 27 and 50 MHz. Each geostationary C-band satellite needs to be spaced 2° longitude from the next satellite to avoid interference; for K u the spacing can be 1°. This means that there is an upper limit of 360/2 = 180 geostationary C-band satellites or 360/1 = 360 geostationary K u-band satellites.
Channel 4 HD Channel is broadcast in 1080i (Sky+HD, Freesat, Sky Q) or 1080p (Sky Q) HD. Channel 4 Channel is broadcast in 16:9 SD unless stated. Channel 4 +1 Channel is a 1-hour time shift of the main channel and is broadcast in 16:9 SD. Regions CI Channel Islands Eng England (including Channel Islands and Isle of Man unless stated) NI
PBS originally utilized three full-time C-band transponders on the Westar 1 satellite, at orbital position 99°W, to deliver programing, but they also leased a fourth "occasional" transponder beginning sometime in 1980. [16] Westar 2, a satellite at orbital position 123.5°W, would be designated as a backup in case of a failure of Westar 1. [8]
Home2US Communications Inc. also offers several ethnic channels on SES 1 at 101° W, as well as other free and pay-TV channels. Many religious broadcasters reach the DTH and distribution markets with unencrypted DVB-S television and radio channels on Galaxy 19. These channels are available as part of the Glorystar Satellite Service.
Note: All channels listed are authorized for distribution, with those in boldface type domestically available through cable, satellite, or IPTV services. [4] However, some may not be carried by a provider due to lack of a carriage contract, low overall viewer interest, programming or rights conflicts with a domestic network, or other technical ...
A Viewsat Xtreme FTA receiver. A free-to-air or FTA Receiver is a satellite television receiver designed to receive unencrypted broadcasts. Modern decoders are typically compliant with the MPEG-4/DVB-S2 standard and formerly the MPEG-2/DVB-S standard, while older FTA receivers relied on analog satellite transmissions which have declined rapidly in recent years.
The satellite is positioned at 107.3° West longitude where it is co-located with Telesat's Anik F1 satellite, doubling both the C-band and Ku-band transponders serving South America. [27] [28] The Anik G1 X-band capacity was leased to the operators of the United Kingdom Ministry of Defence Skynet system, helping Skynet expand to near global ...