Splice Measurements - Viavi T-BERD/MTS 2000 User Manual

1 Position the cursor A at the base of the peak
2 Position the cursor B at the top of the peak of the required Fresnel, or after the
peak to calculate automatically the maximum reflectance.
3 Press the
4 Press validation key (
The Reflectance value is defined in dB, and displayed in the trace in purple.
Figure 50 Reflectance measurement

Splice measurements

There are two methods of carrying out manual measurements of splices on the trace:
the two-cursor method and the five-cursor method.
The five-cursor method is the more accurate, as it takes into account the difference of
level between the slope before the splice and the slope after the splice. This method
should be used whenever possible.
If very close events have created a dead zone preventing the measurement of slope by
the five-cursor method, it is possible to use the two-cursor method. This considers the
difference in level between the cursors.
Before performing one of these measurements, define in the Setup menu the splice
detection threshold.
Chapter 5 Launching a reflectometry test and displaying results
Advanced > Modify Meas.>
or E
User Manual
Advanced functions in Expert OTDR mode
Manual Meas., then select Reflec..
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