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本文介绍140Mb/s长途光缆通信系统设计的有关问题。从选定的模型,决定了假想参考数字通道和数字段的长度,确定了误码性能和抖动特性的指标。并从网路实用性出发,选择了8B1H和5B6B两种线路码,分别构成两种不同的系统。文中还着重介绍了光路主要参量确定的方法和辅助系统的功能,最后较详细地论述了调顶法传送辅助信号的设计问题。
This article describes 140Mb / s long distance optical fiber communication system design issues. From the selected model, the length of the hypothetical reference digital channel and digital segments is determined, and the indicators of bit error performance and jitter characteristics are determined. Based on the practicality of the network, two kinds of line codes, 8B1H and 5B6B, are selected to form two different systems respectively. In this paper, the method of determining the main parameters of optical path and the function of auxiliary system are also introduced emphatically. Finally, the design problem of transferring auxiliary signal by adjusting top method is discussed in detail.