本文介绍了采用集成压控振荡器 NE566作为调制器,集成锁相环 NE565作为低门限解调器,并采用常规的调频收发机为高频系统构成的21路 FM—FM 频分多路遥测系统。重点讨论了锁相解调器与输出滤波器的设计。并对21路集成锁相副载频系统的性能作了测试。目前制成的实验室样机的性能均达到了工程应用的要求。与高频系统进行联试,工作正常,性能指标良好,表明方案可行。 This article describes the use of integrated voltage-controlled oscillator NE566 as a modulator, integrated phase-locked loop NE565 as a low-threshold demodulator, and the use of conventional FM transceiver for high-frequency system consisting of 21 FM-FM frequency division multiplexing telemetry system . The design of PLL demodulator and output filter is discussed. And tested the performance of 21-way integrated phase locked sub-carrier system. The performance of the laboratory prototype made at present has reached the requirements of engineering applications. And high-frequency system for joint test, work properly, good performance indicators, indicating that the program feasible.