EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 78)

Viewing and Analyzing Results
70 PSO-200
Using Averaging to Improve Results
Using Averaging to Improve Results
You can improve the signal waveform (and SNR) by averaging subsequent
acquisitions and removing noise. When doing so, graphs are plotted using
lines between points, so that you can better see the averaged data.
You can set the number of bursts that are averaged, as well as the
averaging window (time resolution, the “bin” size in ps into which samples
are accumulated).

A larger number of bursts improves the SNR but decreases the refresh
rate and tracking.

A smaller time resolution improves the SNR.
The figures below illustrate the improvement of results using averaging.
No
averaging
Using
averaging
(Infinite, 10 ps)