EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 79)

Viewing and Analyzing Results
Optical Modulation Analyzer 71
Using Averaging to Improve Results
The averaging mode “fills the holes” by adding more and more points (at
intervals defined by the time resolution) to build a complete waveform
with all samples from all previous bursts, as shown in the two images
below. The average is recalculated after each burst as follows:
where N is the number of bursts acquired, up to the specified averaging
burst count (1 to 64). If Infinite is specified, N will increase infinitely.
For example, if the averaging burst count is 4, N will be 1, 2, 3, 4, 4, 4...
Note: Averaging is not available in Random input pattern. It requires a pattern
(known or unknown) to function properly.
Note: Averaging will apply to all relevant graphs at once.
NewAverage PreviousAverage
N 1 –
N
-------------  NewBurst
1
N
----  + =
Using
averaging
(1 burst, 5 ps)
Using
averaging
(infinite, 5 ps)