OTDR Series e-Manual, D07-00-076P-RevC00 Page 54 of 107
6.9 Visual Fault Locator (VFL)
The unit is equipped with an optionally built-in Visual Fault Locator (VFL) to trace and visually
identify breaks in ODFs, bare fibers (900 µm), and patch cords that are typically hidden in the
OTDR dead zone.
The VFL works by injecting a 650nm visual red light into the fiber (up to 5 kilometers/3 miles)
to bend a single fiber strand and force light to exit the center of the fiber. It traces it to identify
faults through light leakage. It identifies fiber strands, connectors, breaks, bends and other
potential problems or anomalies on events.
To see the most recent VFL specifications, go www.veexinc.com.
PROTECT YOUR EYES!
Never look directly into the VFL’s light. It is a Class II laser and emits
laser radiation that will harm your eyes.
Use the Home icon (FX150/FX300) or App key (FX300) to toggle between active test
applications (OTDR, OPM, VFL).
VFL can be used with OTDR simultaneously.
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