Fluke Networks CertiFiber Pro Users Manual - Manual (Page 212)

Versiv Cabling Certification Product Family
Technical Reference Handbook
190
Autotest in Loopback Mode
Use Loopback mode to do tests on spools of cable and segments
of uninstalled cable.
In this mode, the tester measures loss and length at two
wavelengths. If you turn on the Bi-Directional function, the tester
makes measurements in both directions.
Figure 80 shows the equipment for tests in Loopback Mode.