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Transponder
Full Definition
A combination receiver, frequency converter, and transmitter package, physically part of a communications satellite. Transponders have a typical output of five to ten watts, operate over a frequency band with a 36 to 72 megahertz bandwidth in the L, C, Ku bands. Communications satellites typically have between 12 and 24 onboard transponders although the INTELSAT VI at the extreme end has 50.
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