EXFO OTDR 2 - Manual (Page 56)

Testing Fibers
48 OTDR
5. Go to the OTDR tab.
6. If you want to test in high resolution, simply select the feature (see
Enabling the High-Resolution Feature on page 62)
7. If your OTDR supports singlemode, singlemode live, or multimode
wavelengths, from the Port list, select the desired fiber type (for
live-fiber testing, select SM Live; for C fiber, select 50 m and for D fiber,
select 62.5 m).
8. Select the boxes corresponding to the desired test wavelengths.