EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 83)

Setting Up the Instrument in WDM Mode
OSA 77
Setting Up WDM Analysis Parameters
5. Modify the settings as needed. For more information about the settings,
see Defining General Settings on page 54 and Defining Default
Thresholds on page 66. If you leave a box empty, it will remain as it was
before your changes. Modify appropriate settings.
6. Press OK to return to the Channels tab, which now contains the
modified settings.
7. Press OK to save the changes and close the window, or press Cancel to
exit without saving.