Fluke OF-500 OptiFiber, Technical Reference Handbook

Page: 88 / 282

OF-500 OptiFiber Certifying OTDR
Technical Reference Handbook
3-14
OTDR Connection Quality
When you run an OTDR test, the tester determines the
quality of OTDR port connection (Figure 3-6).
If the gauge is in the Poor range, you should clean the
OTDR port and the fiber connector. Use a video
microscope, such as the FiberInspector video probe, to
inspect the port and fiber connector for scratches and
other damage. If a connector on the tester is damaged,
contact Fluke Networks for service information.
A poor OTDR connection increases the connector’s
deadzone, as shown in Figure 3-7. The deadzone can hide
faults near the OTDR connector.
A poor connection also decreases the light available for
testing the fiber. The weakened test signal causes a
noisier trace, poor event detection, and decreased
dynamic range.
The port connection quality rating is saved with OTDR
result details.
ajt67f.eps
Figure 3-6. OTDR Port Connection Quality Gauge