Fiber
Optic MiniCourse: Reading An OTDR Trace
Gainer
A
gainer is a splice that shows a gain not a loss. The
gain is seen in the fiber trace following the splice
which is higher than the fiber trace before. Gainers are
not real; they are caused by the fiber following the
splice having higher backscatter, the physical effect of
fiber loss that OTDRs use to make indirect measurements
of fibers. If you look closely, you will usually see the
fiber after the gainer has higher loss than the fiber
before, showing it has higher backscatter and therefore
higher loss.
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