Investigation on operating distance of telemetry base on PCM-FM system

In order to test data the effective acquisition,telemetry receiving and transmitting system design choices and telemetry ground station layout,in this paper,base on FCM-FM telemetry system,and using the test range in the typical frequency and code rate as well as the corresponding telemetry ground station case,a method of telemetry action distance and telemetry receiving system threshold are detailed analysised and calculationed.At the same time,the effects of remote distance of several key factors are analyzed and discussed,were obtained for the same remote transmitting and receiving system,different code rate system receiving threshold and telemetry function distance calculation.The research on operating distance of the telemetry has the important guiding significance in code rate selection and telemetry transceiver development.