DIN EN 61290-5-1:2007-03
Optical amplifiers - Test methods - Part 5-1: Reflectance parameters - Optical spectrum analyzer method (IEC 61290-5-1:2006); German version EN 61290-5-1:2006 / Note: DIN EN 61290-5-1 (2001-06) remains valid alongside this standard until 2009-06-01.