1.The telemetry line tester can be used to detect troubles of station units, cables and geophones in the spread line which is connected with SN348 station units, SN368—C station units, SN368- E station inits, Psu, Ru, Csu with ten functions.
2.To satisfy the PCM telemetry baseband equipment performance requirements of the ground system of Beijing TTC&M earth station, a new design technique of digitized synthesizer whose output frequency can be changed continuously(resolution:1Hz)is proposed in this paper.
