A test loop translator (TLT) is a type of radio frequency converter or heterodyne, used to translate between uplink and downlink segments (generally in the same band), to allow for "loop-back" testing and calibration of a satellite ground station without the need to interface with the satellite. The test loop translator is an extremely valuable tool for evaluating the performance of satellite earth stations.
A test loop translator (TLT) is a type of radio frequency converter or heterodyne, used to translate between uplink and downlink segments (generally in the same band), to allow for "loop-back" testing and calibration of a satellite ground station without the need to interface with the satellite. The test loop translator is an extremely valuable tool for evaluating the performance of satellite earth stations.
Source: Wikipedia "Test loop translator" · CC BY-SA 4.0
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