EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 72)

Setting Up the Instrument in WDM Mode
66 FTB-5240S/S-P/BP
Setting Up WDM Analysis Parameters
5. Press OK to save the changes and close the window, or press Cancel to
exit without saving.
Press Restore Defaults to remove all the changes and apply the default
values.
Defining Default Thresholds
Default thresholds will be applied to any channel found outside the
channel list during the acquisition or re-analysis.
Note: The default thresholds settings are enabled only when the Activate all
thresholds option is selected in the Global Thresholds tab. For more
information, see Defining Global Thresholds on page 62.