Operation Manual

Locating Fibers and Faults with the Visual Fault Locator
Using the Visual Fault Locator
9-3
9
To use the visual fault locator:
1 Clean the connectors on the test reference cord, if
used, and the fiber to be tested.
2 Connect the fiber directly to the tester’s VFL port or
connect using the test reference cord.
3 Turn on the visual fault locator (refer to Figure 9-2):
• DTX-MFM2/SFM2/GFM2 module: press the button
near the VFL connector. Press again to switch to
flashing mode. Press again to turn off the locator.
• DTX Compact OTDR module: Turn the rotary switch
to SINGLE TEST. If necessary, press
JChange
Media then set the media type to Fiber OTDR. Use
the softkeys to start the VFL, switch to pulse mode,
and stop the VFL.
4 Look for the red light to locate fibers or faults, as
shown in Figure 9-2.
5 View the VFL’s light indirectly by holding a white card
or paper in front of the fiber connector emitting the
light.
Note
The locator’s light may not be visible through
dark-colored fiber jackets.