EN 61280-2-1:1999 Fibre Optic Communication Subsystem Basic Test Procedures - Part 2-1: Test Procedures for Digital Systems - Receiver Sensitivity and Overload Measurement
2010EN 61280-2-1:2010 Fibre optic communication subsystem test procedures - Part 2-1: Digital systems - Receiver sensitivity and overload measurement
1999EN 61280-2-1:1999 Fibre Optic Communication Subsystem Basic Test Procedures - Part 2-1: Test Procedures for Digital Systems - Receiver Sensitivity and Overload Measurement