Measurement Of Reflectance - Viavi E4123MM User Manual

1 Position the cursors A and B to delimit the section that you wish to measure.
2 Press the Analysis, then select
3 Press Calculate key.
The ORL is measured for the section of trace defined.
Figure 44 Result of ORL measurement
ORL on a saturated trace
If saturation occurs during an ORL measurement, the result is given with the sign <. This
means that the actual ORL value is less than the value displayed.

Measurement of Reflectance

It is possible to carry out a reflectance measurement of a Fresnel for a reflective event.
Follow the following procedure to measure the reflectance:
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 Analysis, then click on Reflect..
4 Press Calculate key.
The Reflectance value is defined in dB, and displayed in the trace in purple.
User Manual
Chapter 3 Expert OTDR function
ORL from the manual measurement bar.
700MAN201 Rev. 004
Advanced functions
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