标准摘要
[中文适用范围]： IEC 61280 这部分的目的是描述测量眼图和波形参数（例如上升时间、下降时间、过冲和消光比）的测试程序。或者，可以测试波形是否符合预定的波形模板。 [外文原描述]： This part of IEC 61280 is to describe a test procedure to measure the eye pattern and waveform parameters such as rise time, fall time, overshoot, and extinction ratio. Alternatively, the waveform may be tested for compliance with a predetermined waveform mask. This edition includes the following significant technical changes with respect to the previous edition: - the necessity of DC coupling for extinction ratio measurement is clarified; - the definition of extinction ratio has been revised to better harmonize with ITU-T; and - the definition of OMA has been clarified.
英文名称Fibre optic communication subsystem test procedures - Part 2-2: Digital systems - Optical eye pattern, waveform and extinction ratio measurement