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2. Satellite television - Wikipedia

   en.wikipedia.org/wiki/Satellite_television

   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.

3. Satellite television in the United States - Wikipedia

   en.wikipedia.org/wiki/Satellite_television_in...

   In November 1990, Primestar launched as the first North American direct-broadcast satellite service. Hughes's DirecTV, the first national high-powered upper K u-band satellite TV system, went online in 1994. The DirecTV system became the new delivery vehicle for USSB.

4. Television receive-only - Wikipedia

   en.wikipedia.org/wiki/Television_receive-only

   At this time, the vast majority of analog satellite TV transponders still were not encrypted. [13] On November 1, 1988, NBC began scrambling its C-band signal but left its K u band signal unencrypted in order for affiliates to not lose viewers who could not see their advertising. Most of the two million satellite dish users in the United States ...

5. C band (IEEE) - Wikipedia

   en.wikipedia.org/wiki/C_band_(IEEE)

   One use of the C band is for satellite communication, whether for full-time satellite television networks or raw satellite feeds, although subscription programming also exists. This use contrasts with direct-broadcast satellite , which is a completely closed system used to deliver subscription programming to small satellite dishes that are ...

6. Multichannel television in the United States - Wikipedia

   en.wikipedia.org/wiki/Multichannel_television_in...

   In the early days of home satellite dishes, the two types of service were low-power C-band service with large dishes 8 to 12 feet wide, and high-power Ku-band. [10] [11] In 1979, COMSAT announced a plan to allow viewers to receive programming directly from broadcast satellites, a concept called direct-broadcast satellite (DBS). This system ...

7. PBS Satellite Service - Wikipedia

   en.wikipedia.org/wiki/PBS_Satellite_Service

   In this plan, PBS would continue to lease four C-band transponders starting in 1991, with the goal being to convert their satellite operations to Ku-band sometime in 1993 or 1994. [24] In 1991, PBS purchased C-band transponder space on the Spacenet 1 satellite, owned by GTE, at orbital position 120°W. [9] This move occurred on January 3, 1991.