Use the HDR OTDR
OTDR Port Connection Quality
261
To use the launch compensation function
1 On the home screen, tap SET COMP.
2 Select a launch method, make the connections shown on the
screen, then tap SET.
When you use launch and tail cords that have APC connectors,
it is possible that the tester will not find the connectors when
you try to set up the launch compensation function. If this
occurs, enter the lengths of the launch and tail cords
manually.
For details on the launch compensation function, see “How to Set
Up the Launch Compensation Function” on page 204.
OTDR Port Connection Quality
When you do an OTDR test, the test shows the quality of the
OTDR port connection (Figure 98). If a test takes more than
approximately 3 seconds, the PROGRESS screen also shows a
preview of the OTDR trace. The trace is black for one wavelength
and blue for the other wavelength.
If the Gauge is Not in the Good Range
• Clean the OTDR port and the fiber connector. Use a video
probe to inspect the endfaces in the port and fiber connector
for scratches and other damage. If an endface on the tester
shows damage, contact Fluke Networks for service
information.
• If the gauge stays outside the Good range, remove the
adapter from the module and inspect the adapter for
damage. Make sure that the white plastic ring inside the
center tube shows no damage.
A poor OTDR connection increases the dead zone at the
connector. The dead zone can hide faults that are near the OTDR
connector.
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