Downlink - Transmission of radio frequency signals from a satellite to an earth station. A satellite dish that receives signals. Ku-band earth stations use the 14 GHz frequency band to transmit and the 12 GHz frequency band to receive. Satellite - Satellites are communication devices used in the broadcasting of radio, television, computer data, and the latest technology global positioning. This precise distance from earth places them in a Geostationary Orbit, meaning the satellites rotate at the same speed as the earth and thus appear to be stationary.
Satellites receive and retransmit electromagnetic signals.
Transponder - Satellite equipment that receives signals on the uplink, translates them to the downlink frequency, and amplifies them for retransmission to earth. Uplink - The signal path from an earth station to a satellite.