EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) - Manual (Page 75)

Setting Up the Instrument in WDM Mode
Optical Spectrum Analyzer 67
Setting Up WDM Analysis Parameters
Defining Global Thresholds
Global thresholds will be applied to the global results during the next
acquisition. However, any modifications made in the global thresholds
parameters can also be applied to the active trace for re-analysis.
The application allows you to activate and deactivate the threshold
functionality with a single control. When thresholds are globally enabled,
the results are displayed with the Pass/Fail status based on various settings
(global results, channel results). In addition, a global pass/fail status is also
displayed in the Global Results tab (See Global Results Tab on page 304).
When thresholds are globally disabled, results are displayed without a
Pass/Fail status and the Global pass/fail status will not be active in the
Global Results tab. The P/F column under the results table will not be
displayed.