IEC 61744:2005
[Revised]
Calibration of fibre optic chromatic dispersion test sets
...In all cases, this calibration of primary parameters is
necessary, but may or may not be sufficient, to ensure calibration of the CD test set to the
required uncertainty...
...In addition, it may be necessary to also confirm or compensate the calibration state of a CD
test set using a calibrated reference fibre...
...wavelength, fibre type, loss
regime, etc...