KS C IEC 61280-2-9:2003 Fiber optic communication subsystem test procedures-Part 2-9:Digital systems-Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
2003KS C IEC 61280-2-9:2003 Fiber optic communication subsystem test procedures-Part 2-9:Digital systems-Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems