EXFO MAX-700 - Manual (Page 89)

MAX-700 77
7 Testing Fibers in Fault Finder
Mode
The application offers you a special testing feature to rapidly locate fiber
ends. It also displays the length of the fiber under test.
This could be useful if you want to perform a quick test without having to
set all the acquisition parameters.
Acquiring Traces in Fault Finder Mode
The unit will determine the more appropriate wavelength (singlemode or
multimode, depending on your test configuration). It will use the default
IOR (group index), RBS coefficient, and helix factor. The duration of
acquisition is 45 seconds.
To acquire traces in Fault finder mode:
1. Clean the connectors properly (see Cleaning and Connecting Optical
Fibers on page 42).
2. Connect a fiber to the OTDR port.
If your unit is equipped with two OTDR ports, ensure that you connect
the fiber to the appropriate port (singlemode, singlemode live, or
multimode), depending on the wavelength you intend to use.
C
AUTION
Never connect a live fiber to the OTDR port without a proper setup.
Any incoming optical power ranging from –65 dBm to –40 dBm will
affect the OTDR acquisition. The way the acquisition will be
affected depends on the selected pulse width.
Any incoming signal greater than 10 dBm could damage your
MAX-700 permanently. For live-fiber testing, refer to the SM Live
port specifications for the characteristics of the built-in filter.