EXFO iOLM User Manual
Page 50
Setting User Preferences
44
iOLM
Configuring your iOLM
4. Specify if a launch and receive fibers are connected to the link under
test, and enter their lengths. The acceptable range is from 0 to 5 km for
the launch fiber and 0 to 500 km for the receive fiber. See Launch,
Receive, and Loop Fiber on page 7 for more details.
If you have the loopback (LB) software option and if you want to test in
loopback mode, select the loop fiber checkbox. Specify the loop fiber
length at this point. The range is from 0 to 5 km.
When specifying a launch and a receive fibers, as well as a loop fiber, two
different icons may appear when the fiber length is out of the
recommended range. If you tap on the icons, the application then suggests
the appropriate values.
The
appears if the provided values are required but not selected
and if the values entered are not within the appropriate range.
The
is displayed if the values are not within the appropriate
range.
The help icon opens a window suggesting the appropriate fiber length for
an expected link loss. The icon is not available when a non-supported
configuration is selected.
If you want to automatically calibrate the launch and receive fiber lengths,
tap Measure. You have to specify the loop fiber manually.