Fluke OF-500-01 OptiFiber, Technical Reference Handbook, Page: 115 / 278

Using the OTDR
Comparing OTDR Traces
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3
Comparing OTDR Traces
The trace overlay function lets you see two OTDR traces at
the same time. This lets you do the following:
•
Compare a link’s current trace with a past trace to see if
the link has changed.
•
Compare traces from links in the same run to check for
differences.
To compare two traces, do the following:
1 Run an OTDR test; then press
A
View Trace.
or
View an OTDR trace from a saved record.
This trace is the Comparison Trace.
2 Press
F
. This brings up the OTDR FUNCTIONS menu
(Figure 3-15).
3 Select New Reference Trace.
4 On the VIEW RECORDS screen, select a record. Only
records with OTDR traces are shown.
The test’s trace becomes the Reference Trace on the
OTDR FUNCTIONS menu.
5 Press
e
.
The reference trace stays on the plot until you turn off the
trace overlay function.