In the first stage, the signal from the television broadcast on the other side of the earth is first beamed up to the satellite from the ground station on the earth. The frequency assignments are determined in joint negotiations by the countries of the world through the auspices of the Radio Communication Sector of the International Telecommunication Union. Uplink Transponders Downlink Let’s consider an example of signals from a television. Because the satellite serves as a transmit/receive station, it must be characterized by a G/T for the uplink side and by saturated equivalent isotropic radiated power for the downlink side. Uplink frequency > Downlink frequency Hence, option C is correct. To analyze the Satellite Uplink and Downlink. In satellite communication, uplink and downlink frequencies are kept different. The satellite receives this signal and re-broadcasts it on a downlink frequency to another ground station. The commercial application of Ka-band satellites was first introduced by NASA's experimental Advanced Communications Technology Satellite, which demonstrated successful use of the 17.5 to 22.5 GHz downlink and 29.5 to 34.5 GHz bands for various services. is s a loss of power of a satellite downlink signal due to earths atmosphere. A satellite Uplink transmits a video or data signal on a certain frequency which is either Horizontal or Vertical. satellite at a frequency known as the uplink frequency. It deals primarily with the C-band, Ku-band, and Ka-band frequency Fixed-satellite service satellites, as those are most commonly used by broadcasters.

This chapter addresses system and equipment aspects of uplinks and downlinks that are used for television contribution and distribution.

Satellite uplink and downlink