NF C93-807-2-9*NF EN 61280-2-9:2009
光纖通信子系統試驗程序.第2-9部分:數字系統.密集型波長區分復用系統光學信噪比的測量
Fibre optic communication subsystem test procedures - Part 2-9 : digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems.