Aution – EXFO OTDR 2 User Manual
Page 55
Testing Fibers
OTDR
47
To acquire traces:
1. Clean the connectors properly (see Cleaning and Connecting Optical
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.
3. If you want to set your own IOR (group index), RBS coefficient or helix
factor, see Setting the IOR, RBS Coefficient, and Helix Factor on
page 24.
4. If you want to set the first connector check, see Enabling or Disabling
the First Connector Check on page 57.
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 OTDR
module permanently. For live-fiber testing, refer to the SM Live port
specifications for the characteristics of the built-in filter.