Use the OTDR
Settings for OTDR Tests
201
Launch Com-
pensation
Tap the control to turn the launch compensation function
on or off. SeeAbout Launch and Tail Cords on page 202.
Macrobend
Detection
(single-mode
only)
On: The tester identifies bends. To identify a loss event as
a bend, the tester compares the event’s loss at two
wavelengths, such as 1310 nm and 1550 nm. If the loss is
more at the longer wavelength and is more than the
macrobend threshold, the tester identifies the event as a
bend. This setting is On by default.
For the Auto OTDR test, the threshold for the loss
difference is 0.50 dB. To use a different threshold, set up a
Manual OTDR test. You can change the Macrobend Setup
in the Manual OTDR Settings. See the Technical Reference
Handbook.
Notes
A bend always causes a FAIL result. If you want a
PASS result for a link that has a bend, turn off
Macrobend Detection.
Off: The tester does not identify bends. Bends show as loss
events in the results.
Wavelength
Select the wavelengths you want to use. You can do tests
at one or all of the wavelengths supported by the module
you selected. The FaultMap and FiberInspector tests do
not have this setting.
Note
If you use only one wavelength, the Macrobend
Detection function will not identify bends.
Fiber Type
Select a fiber type that is correct for the type you will test.
To see a different group of fiber types, tap MORE, then
tap a group.
Table 8. Settings for OTDR Tests (cont.)
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