Operation Manual

DTX Series CableAnalyzer
Technical Reference Handbook
10-8
Table 10-3.
Small reflective event with high loss. May be identified as an end event though it occurs
before the en
d of the cabling.
May be caused by very sharp bend, a crack, or a mechanical splice with high loss. If the
event is a bend, it may show higher loss at a longer wavelength. Use a visual fault locator
to verify the problem. Bad mechanical splices should be reworked.
Large reflective event with gain (a “gainer”).
A connector between mismatched fibers (different backscatter coefficients, core sizes,
n
umerical apertures, or other parameters). This example shows a smaller core size connected
to a larger core size. Testing from the other end would show a large reflective event with more
loss than a connector should have.
Diagnosing OTDR Test Failures (cont.)
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