DIN EN 61280-1-4:2010 Fibre optic communication subsystem test procedures - Part 1-4: General communication subsystems - Light source encircled flux measurement method (IEC 61280-1-4:2009); German version EN 61280-1-4:2010
2010DIN EN 61280-1-4:2010 Fibre optic communication subsystem test procedures - Part 1-4: General communication subsystems - Light source encircled flux measurement method (IEC 61280-1-4:2009); German version EN 61280-1-4:2010