EXFO iOLM - Manual (Page 109)

intelligent Optical Link Mapper 103
10 Using the OTDR as a Source
(Optional on Some Models)
The Source tab allows you to operate the existing OTDR laser as a source
to do power meter measurements at the other end of the fiber. This helps
to quickly locate the correct fiber or perform loss measurements.
To use the OTDR as a source:
1. From the upper panel, select Source tab.