Exfo FTB-500 (Window XP) Manuel d'utilisateur Page 135

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Using the Optional Built-In Power Meter and VFL
FTB-500 125
Identifying Fiber Faults Visually with the VFL
Identifying Fiber Faults Visually with the VFL
The visual fault locator (VFL) helps you identify bends, faulty connectors,
splices and other causes of signal loss. It can also help the person at the
other end of the link to identify the fiber under test, which could be
particularly useful when working with cables containing many fibers.
From its dedicated port, the VFL emits a red signal which becomes visible
at the location of a fault on the fiber. This signal can be continuous (CW,
the default) or blinking (1 Hz).
WARNING
When the VFL is active, the VFL port emits visible laser radiation.
Avoid exposure and do not stare directly into the beam. Protect any
unused port with a cap.
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