EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) - Manual (Page 130)

Setting Up the Instrument in Drift Mode
122 FTB-5240S/5240BP
Defining Preferences
4. Press Up or Down to change the order in which the field values will
appear in the file name.
Based on the fields selected, a preview of the file name shall be
displayed under File name preview. The field values are separated
with an underscore ( _ ).
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
settings.