EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 75)

Viewing and Analyzing Results
Optical Modulation Analyzer 67
Using Pattern Masks
Creating or Editing Mask Definition Files
The Optical Modulation Analyzer does not include a mask editor. However,
mask definition files (.maskcfg) are in XML format, allowing you to easily
create custom-made masks or edit the ones provided.
Note: You can modify mask definition files while the application runs, but you
must reopen the Acquisition Settings window to update the list of masks.
The following examples show the file format for each type of mask:
Symbol coordinates (center
point with radius)
One <Circle> block per symbol
(QPSK = 4 symbols)
Mask name (displayed in Acquisition Settings)
Constellation Mask (QPSK)
Mask type tag
Margin around each circle (in %)