EXFO FOT-930 Multifunction Loss Tester - Manual (Page 69)

Multifunction Loss Tester 61
11 Identifying Fiber Faults
Visually
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
(CW, the default) or blinking (1 Hz).

The Power Meter pane remains displayed
when you use the VFL.

If you switch to source or power meter while
the VFL is active, the VFL pane remains
displayed.

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 source, VFL, ORL meter or talk set
port status (even in FIP or 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.