DIN EN 61290-7-1:1999 Fiber Optic Amplifiers – Basic Specification Part 7-1: Test Methods for Out-of-Band Insertion Loss Optical Power Meters and Filters
2008DIN EN 61290-7-1:2008-02 Optical amplifiers - Test methods - Part 7-1: Out-of-band insertion losses - Filtered optical power meter method (IEC 61290-7-1:2007); German version EN 61290-7-1:2007 / Note: DIN EN 61290-7-1 (1999-08) remains valid alongside this standard until 2010-...
2008DIN EN 61290-7-1:2008 Optical amplifiers - Test methods - Part 7-1: Out-of-band insertion losses - Filtered optical power meter method (IEC 61290-7-1:2007); German version EN 61290-7-1:2007
1999DIN EN 61290-7-1:1999 Fiber Optic Amplifiers – Basic Specification Part 7-1: Test Methods for Out-of-Band Insertion Loss Optical Power Meters and Filters