EXFO TG-300B Tone Generator - Manual (Page 13)

TG-300B/LFD-300B FiberFinder 8
Identifying Dark Fibers
When you need to identify dark fibers, install a light source at one end of the
fiber-optic link and the LFD­300B at the other end.
Note: The following EXFO sources are best suited for use with the LFD­300B:
FLS-300, FOT-300, FLS-600, FOT-600, and FOT-930.
To identify a fiber:
1. Connect the source to the fiber.
2. At the other end of the fiber-optic link, install the fiber in the alignment groove of
the unit as described in Installing the Fiber in the Alignment Groove on page 6.
3. Put the protective cap on the head of the unit.
4. Slide the switch downward.
During the LFD­300B startup procedure, the unit vibrates and emits a sound, the
Positioning LED blinks, and LOAd appears on the display. This startup procedure
takes about 20 seconds to complete.
Once the unit detects the source signal, it emits one beep and one of the tone
recognition LEDs lights up.
Note: If the tone recognition LED does not remain lit, it means that there is no
real signal in the fiber. It is possible that, for a second or so, the
LFD­300B has picked up a parasite signal. Slide the switch upward and,
with another fiber, repeat steps 2 through 4.
5. Slide the switch upward when the test is finished.
I
MPORTANT
EXFO recommends that you use the protective cap when performing
your tests to minimize the possible influence of ambient light.