Fluke CableAnalyzer DSX-5000, Technical Reference Handbook, Page: 407 / 700

Chapter 11: The OptiFiber Pro OTDR Module
Real Time Trace
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Real Time Trace
The real time trace lets you see changes in the OTDR trace as they
occur. In this mode, the tester updates the OTDR trace several
times each second. This mode helps you do tasks such as these:

Find intermittent problems, such as those that occur only
when you bend a fiber or apply force to a connector.

Quickly see differences in segment lengths and the locations
of connections in different links. Use the real time trace to
look at one link, then connect to another link to quickly see a
trace and compare it to the previous trace.

Align fibers when you make a splice.
W
Caution
Before you use the OTDR to help you make a splice,
read the instructions for the splice machine. The
light pulses from the OTDR can cause problems for
some splice machines.
Note
The real time trace uses a lot of battery power. Use
the ac adapter when you use this test for an
extended period of time.
The real time trace test has two modes: auto length and fixed
length.

AUTO LENGTH
: The tester makes necessary adjustments in its
range and pulse width periodically or whenever the trace
changes. These adjustments make the trace fill the screen for
the best overall view of the fiber. The locations shown for
connections and other features change if the range changes.
The real time trace starts in auto length mode.

FIXED LENGTH
: The tester does not change any parameters
for measurements, even if the trace changes. (The tester