Celestia - Front-End Telemetry (TM) and Telecommand (TC) Unit- Brochure

The TMTC Front-End is a telemetry (TM) and telecommand (TC) unit which provides direct control of spacecraft, using baseband interfaces during spacecraft development, assembly, integration, test (AIT) and launch phases.  The TMTC typically connects to the spacecraft On-Board Computer (OBC) or Central Data Management Unit (CDMU) via the direct bypass interfaces or via an RF SCOE.  The TMTC Front-End is used for spacecraft onboard computer testing, flight Transponder or communicate with spacecraft before the launch.