20 路立体声光纤双向数字传输系统的研制

Research on Twenty Channel Stereo Optical(Double Direction) Digital Transmission System

叙述了２０路立体声数字传输系统的组成及其工作原理，对整个系统的多种功能及系统中的单元立体声收发端机、３４Ｍｂ／ｓ复接单元和分接单元与帧同步码提取等进行了分析，并给出测试结果．该系统路数多，兼容性强，性能指标高，已付之实用．

The twenty channel stereo digital transmission system and its principle are introduced. The functions of this transmission system, the transmitting unit and receiving unit, 34 Mb/s multiplexer and demultiplexer in the system and the circuit of frame synchronization are analyzed. The testing results show that the system, which has been used in practical environment, has many stereo channels, good compatibility and superb performances.