EXFO AXS-100 Series OTDR - Manual (Page 97)

OTDR 89
10 Identifying Fiber Faults
Visually
Note: This feature is available only if your unit is equipped with a VFL port.
The visual fault locator (VFL) helps you identify bends, faulty connectors,
splices and other causes of signal loss.
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 (the
default) or blinking (1 Hz).
³
The VFL status is indicated with a LED in the
status bar and with the Active indicator
under the keypad.
Note: The Active indicator always shows the VFL or
OTDR status (even in idle mode).
W
ARNING
When the VFL is active, the VFL port emits visible laser radiation.
Avoid exposure and do not stare directly into the beam. Ensure that
any unused port is properly protected with a cap.