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C-Band is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 3.7 to 4.2 GHz. C-Band is primarily used for open satellite communications, whether for full time satellite TV 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 connected to proprietary receiving equipment.

C-Band is highly associated with TVRO satellite reception systems, commonly called "big dish" systems since small receiving antennas are not optimal for C-Band systems. Typical antenna sizes on C-Band capable systems ranges from 7.5 to 12 feet (2.5 to 3.5 meters) on consumer satellite dishes, although larger ones also can be used.

Contrary to popular belief, digital C-Band does in fact exist.

See also: electromagnetic spectrum; communications satellite; Ku-Band

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