위성제어용 RF Telecommand 및 Telemetry 시험 장비 설계 및 제작

Telecommand & telemetry control equipment is needed for the testing of the transponders during the development of satellite. This equipment must have a loopback function to perform the self testing without satellite. The fabrication of the designed system is easier and cheaper than the conventional testing system using direct modulation method. The measured results of fabricated equipment are satisfied with required specifications. A overall path loss of uplink and downlink is 47.8 ㏈ and 42.6 ㏈, respectively. Also, IMD3 of uplink has measured 60.68 ㏈c at an output of -so ㏈m.