EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) - Manual (Page 308)

Managing Results
300 FTB-5240S/5240BP
Managing WDM Test Results
3. Edit the values as explained below:
³
Channel number: indicates the number of the channel. This field
value cannot be edited.
³
Channel name: indicates the name of the channel.
³
Channel Center (nm or THz): indicates the central
wavelength/frequency for the channel.
³
Channel width (GHz or nm): indicates the limit inside which the
power values will be considered in the channel.
³
OSNR distance (GHz or nm): OSNR distance for IEC interpolation
method is automatically set at the channel edge, that is, at the half
of the channel width from the center wavelength.