Fluke CableAnalyzer DSX-5000, Техническое справочное руководство, Страница: 368 / 700

Versiv Series Cabling Certification Product Family
Technical Reference Handbook
332
OTDR Port Connection Quality
When you do an OTDR test, the test shows the quality of the
OTDR port connection (Figure 137). 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.
A poor connection also decreases the strength of the signal from
the OTDR. The weaker signal causes more noise on the trace,
which can cause the OTDR to miss events. It also decreases the
dynamic range.
When the test is completed, the quality gauge shows in the
details for the
OTDR Port
event on the EventMap screens. The
tester includes the gauge with the test results you save.
Port Connection Quality for SmartLoop Tests
For SmartLoop tests, the
OTDR Port
connection for the second
fiber is the input connector of the loopback cord. See Figures 155