EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 89)

Testing Fibers in Advanced Mode
OTDR 75
Enabling the High-Resolution Feature
To enable the high-resolution feature:
From the main window, select the OTDR pane.Select the High-Resolution
Acquisition box.
Note: If your OTDR supports singlemode, singlemode live, or multimode
wavelengths, the high-resolution feature will be activated either for the
singlemode, singlemode live, or multimode wavelengths, depending on the
selected fiber type.