EXFO AXS-100 Series OTDR - Manual (Page 46)

Testing Fibers
38 AXS-100 Series
Testing in Auto Mode
Testing in Auto Mode
The application will automatically evaluate the best settings according to
the fiber link currently connected to the unit (in less than 5 seconds).
By default, fiber characteristics are evaluated each time you start a test.
This is particularly useful if you often have to test fiber links of different
lengths.
If you prefer, you can set your unit to keep the same settings (range and
pulse) for all acquisitions. This could be useful if you need to test several
similar fibers (same length) within the same cable. It is always possible to
reset the fiber settings later.
If you intend to test at multimode wavelengths, carefully read Launch
Conditions for Multimode Measurements on page 50.