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Published byCameron Sullivan Modified over 9 years ago
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DirecTV and Satellite Radio
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Direct Broadcast Satellite ◦ DirecTV Satellite Radio ◦ Background ◦ Common Technology ◦ Competitors XM SIRIUS WorldSpace
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Direct Broadcast Satellite ◦ Refers to either Television Service Satellites which deliver service ◦ Mini-dish systems Parabolic Surface Focuses incoming signals into Feed Horn Reflects outgoing signals into narrow beam Main part Consists of Low Noise Blockdown Converter (LNB)
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Typical System ◦ Operates in upper Ku Band (12 GHz to 14 GHz) Legislation C Band ◦ Proprietary equipment needed Encryption Smart Card Fixed Satellite Service (FSS) ◦ Operates in C-Band (3.4 GHz to 7 GHz)
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Technology ◦ Satellites Satellites Three geostationary satellites Two more to be launched 18 x 20 in elliptical dish 5 LNB’s High Definition ◦ Access Cards D2/P12 – Current Issue Law suits ISO-7186 Smart Card Device ◦ MPEG-II Compression 270 Mbps down to 10 Mbps
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SatelliteOrbital slotLaunch dateSatellite type DirecTV-1110.0° W17 December 1993Hughes Electronics HS-601 DirecTV-2100.8° W3 August 1994Hughes Electronics HS-601 DirecTV-1R100.8° W10 October 1999Hughes Electronics HS-601HP DirecTV-4S101.2° W27 November 2001Hughes Electronics HS-601HP DirecTV-572.5° W7 May 2002Space Systems/Loral LS-1300 DirecTV-6109.8° W9 March 1997Space Systems/Loral LS-1300 DirecTV-7S119.0° W4 May 2004Space Systems/Loral LS-1300 DirecTV-8101.0° W22 May 2005Space Systems/Loral LS-1300 DirecTV-9S101.1° W13 October 2006Space Systems/Loral LS-1300 SPACEWAY-1102.8° W26 April 2005Boeing BSS-702 SPACEWAY-299.2° W16 November 2005Boeing BSS-702 DirecTV-10, 11, 12TBDEst. 2007Boeing BSS-702
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Background ◦ Digital Audio Radio Service (DARS) Established in 1992 Operates in S-Band (2.3 GHz) 4 Second Delay ◦ Main Competitors North America XM and Sirius Europe, Middle East, Africa WorldSpace ◦ Terrestrial Repeaters (Cell Towers)
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Technology ◦ Satellites Two geostationary satellites XM Rhythm at 115° west XM Blues at 85° west Replaced previous XM Rock and XM Roll Third as a spare Uses 12.5 MHz of S band: 2332.5 to 2345.0 MHz GM, Honda
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Technology ◦ Satellites Three Medium Earth Orbit Extremely Elliptical Path At least one satellite for 14 hours per day. Positions Radiosat 1, Radiosat 2, Radiosat 3 Radiosat 1Radiosat 2Radiosat 3 Fourth as a spare ◦ BMW, Daimler-Benz, VAG
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Technology ◦ Operates in L-Band (1.467 GHz to 1.492 GHz) Satellites ◦ AfriStar, AsiaStar, AmeriStar
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Direct Broadcast Satellite ◦ DirecTV Satellite Radio ◦ XM, SIRIUS, WorldSpace Background Technology Satellites
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