EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 293)

Managing Results
OSA 287
Managing DFB Test Results
Managing DFB Test Results
The application allows you to view and manage your DFB test results. You
can view the graph and results for your DFB laser source.
DFB Graph Tab
The DFB Graph tab allows you to view the spectrum of a DFB laser source.
This graph represents the optical power against wavelength or frequency.