EN 61280-1-3:1999 Fibre Optic Communication Subsystem Basic Test Procedures Part 1-3: Test Procedures for General Communication Subsystems Central Wavelength and Spectral Width Measurement
2010EN 61280-1-3:2010 Fibre optic communication subsystem test procedures - Part 1-3: General communication subsystems - Central wavelength and spectral width measurement
1999EN 61280-1-3:1999 Fibre Optic Communication Subsystem Basic Test Procedures Part 1-3: Test Procedures for General Communication Subsystems Central Wavelength and Spectral Width Measurement