EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 77)

Viewing and Analyzing Results
Optical Modulation Analyzer 69
Using Pattern Masks
EVM masks follow the same requirements and rules as intensity masks, but
do not contain upper and lower zones.
To edit mask definition files:
1. Locate the following folder: [application data]\EXFO\PSO-200\Masks.
This is where the application looks for mask files. There is a subfolder
for each mask type.
2. To keep the provided files intact, make a copy of one of them and open
this copy with an XML editor or Notepad.
3. Make the necessary changes, following the guidelines given in the
above examples.
4. Save the file in the folder corresponding to its mask type. Use a
meaningful name for your needs, as the application does not consider
the file name.
EVM Mask
Mask polygon points
Uniform margins around mask (0.1 = 10 %)
Mask type tag
Mask name (displayed in Acquisition Settings)
Custom margins around mask
(use a <Polygon> block as for the mask itself)