Fluke DTX-1800 Technical Reference Handbook page 199

Event
No Fiber
No fiber is attached or the
fiber is too short to measure.
No Signal
There is a problem with the
module.
End
The end of the cabling.
Hidden End
Table 7-3. Event Types (cont.)
No fiber is attached to the OTDR port, the fiber is too short, or there is a bad
connector or broken fiber somewhere near the tester.
Check for bad connections and broken fibers within a few meters of the tester.
If this continues to occur, contact Fluke Networks for assistance.
The tester identifies the end of the cabling as the point where the backscatter stops.
The tester does not measure the loss of End events. Note that a very high-loss event,
such as a sharp bend, can appear to be the end of the cabling.
The end of the cabling is hidden by a reflective event.
Using the OTDR Module
Looking at OTDR Test Results
Possible Causes
7
7-41