有线电视网双向传输系统

文章概述了有线电视网双向传输的几种接入技术，阐明了有线电视网双向传输光系统的特点，重点描述了光发射机、光放大器、光接收机和有线电视回传信道的应用。本文为某有线电视台双向网改造的实用实例，可为其他有线电视台的双向网改造提供参考。

Bidirectional transmission system in CATV networks

Some kinds of access technology used in bidirectional transmission in CATV networks are described and the features of bidirectional optical transmission system applied in CATV networks are presented.The applications of optical transmitter are emphasized on,as well as optical amplifier,optical receiver and the return path of bidirectional cable systems.In fact,an example of bidirectional HFC reforming for a CATV station can be as a good reference for those CATV stations where one want to reform their networks.