EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 78)

Setting Up the Instrument in WDM Mode
72 FTB-5240S/S-P/BP
Setting Up WDM Analysis Parameters
4. Enter values in the boxes as explained below:

Start range (nm or THz): starting range of the channel list.

Stop range (nm or THz): ending range of the channel list.

Channel center wavelength/frequency: spectral center-of-mass for
the peak in that channel.
Note: When using the custom channel center wavelength option, the first channel
will be centered at the Start Range, and the list will be created using
channel distance and channel width.

Channel distance (nm or GHz): distance between channels. The
value of channel distance will be set depending on the selection
made for the channel center wavelength option. The channel
distance box will be enabled only when the channel center
wavelength option is set to custom.

Channel width (nm or GHz): limit inside which the power values
will be considered in the channel. Integrated power is calculated
on channel width.

Name prefix: adds a prefix to the channel names.