Measures the pertinent coefficients of the logarithmic transfer matrix of a branching device in order to determine the ability of the device to carry out its design.
ANSI/TIA/EIA 455-180-A-1999 history
1999ANSI/TIA/EIA 455-180-A-1999 FOTP-180, Measurement of the Optical Transfer Coefficients of a Passive Branching Device (Coupler)