EXFO FTB-5600 Distributed PMD Analyzer - Manual (Page 89)

Managing Results
Distributed PMD Analyzer 83
Estimating Results
Estimating Results
You can manage the fiber sections as desired to obtain a better
characterization. The FTB-5600 allows you to evaluate fiber section
replacement scenarios in the link without actually replacing the section
itself.
This is done by modifying one or some strong PMD sections of the link to
analyze. By modifying the PMD value or the coefficient of the section in
those links, you can see the simulated cumulative PMD value that will
result from those changes.
For example, you have made an acquisition with several sections. Let us
verify what happens to the cumulative PMD of the link if we set PMD value
of the eighth section to zero. The link cumulative PMD goes from 8.903 ps
to 5.273 ps.