DIN EN 61280-2-2-2009 光纤通信子系统试验程序.第2-2部分:数字系统.光眼图、波形和消光比测量
Fibre optic communication subsystem test procedures - Part 2-2: Digital systems - Optical eye pattern, waveform and extinction ratio measurement (IEC 61280-2-2:2008); German version EN 61280-2-2:2008