电视信号, 声音和交互服务用电缆网络. 第14部分: 采用RFoG技术的光学回路系统

[中文适用范围]： 本标准描述了用于电视信号、声音信号和交互服务的电缆网络中的RFoG（射频玻璃）系统。该系统采用RF子载波复用技术在前向和反向路径两个方向上传输信息，其中反向路径传输还额外使用由TDMA（例如DOCSIS的TDMA模式）协议强加的时间多址访问技术。此类系统由RFoG光网络单元（R-ONU）、基于xPON结构的无源光分配网络（ODN）以及RFoG光反向路径接收器组成。本标准规定了RFoG系统的基本系统参数和测试方法，以评估系统性能及其性能极限。物理层的详细描述不在本标准范围内，也不包括IP传输技术。 [外文原描述]： IEC 60728-14:2014 describes the system and equipment specification of FTTH/FTTB (fibre to the home/fibre to the building) networks where information is transmitted in both, forward and return path directions using RF subcarrier multiplexing technology, and where the return path transmission uses additionally time division multiple access technique imposed by the transmission of the return path signals using a TDMA (e.g. TDMA mode of DOCSIS) protocol. Such systems are called RF over Glass (RFoG) and consist of an RFoG optical network unit (R-ONU), an optical distribution network based on xPON structure, and an RFoG optical return path receiver. This standard specifies the basic system parameters and methods of measurement for RFoG systems in order to assess the system performance and its performance limits.