The C/TT-505 from L3Harris Technologies is a UHF Command/Telemetry Transceiver. It is designed to meet the needs of many different types of space systems that require command and telemetry capabilities. The transceiver provides full-duplex wireless RF command, telemetry and a data link between two spacecrafts. It incorporates the OIC Proximity-1 protocol, providing error-free communication by employing an error-detection and retransmission service. Additionally, the Proximity-1 protocol provides an automatic link-establishment feature that allows the primary transceiver to reconfigure the secondary transceiver with no intervention from the secondary spacecraft.
The C/TT-505 is flexible enough to accommodate many mission scenarios where a data link is needed between two spacecraft, such as planetary and lunar orbiter/lander spacecraft, formation-flying interferometry spacecraft and asteroid or comet fly-by spacecraft. It uses an RS-422 serial command and status interface to allow the spacecraft to control or reconfigure the transceiver and get extensive insight into the current configuration, link status and health of the transceiver.
