DIN EN 61290-3-2:2009-06
Optical amplifier - Test methods - Part 3-2: Noise figure parameters - Electrical spectrum analyzer method (IEC 61290-3-2:2008); German version EN 61290-3-2:2008 / Note: DIN EN 61290-3-2 (2003-08) remains valid alongside this standard until 2011-10-01....