TEST DEVICE FOR X-BAND COMMUNICATION SATELLITE REPEATER

摘要

PURPOSE: A test device for an X-band communication satellite repeater is provided to attempt a design of the communication satellite repeater in various situations by designing an active repeater and a conventional inactive repeater for installing an on-board processor as one repeater and providing the environment for testing the communication satellite repeater in a real X-band. CONSTITUTION: An input filter(31) receives a PCM signal outputted from an upward link signal generating device and passes only desired band signal. A switch(32) switches a signal through the input filter(31). An LNA(Low Noise Amplifier,33) performs a low noise amplification of a signal through the switch(32). A switch(35) switches a signal amplified in the LNA(33). A down converter(D/C)(37) converts a signal with 7.9-8.4GHz through the switch(35) into a signal with 7.25-7.75GHz. An input multiplexer(39) divides a signal outputted from the D/C(37) for an active repeating process and an inactive repeating process. A divider(54) divides a reference frequency with 10MHz generated in a reference oscillator(53). A local oscillator(55) outputs a local frequency with 650MHz to the D/C(37) using the reference frequency with 10MHz outputted through the divider(54).