EXFO PSO-200 Optical Modulation Analyzer - Manual (Page 91)

Bit Pattern Analysis and the Gearbox
Optical Modulation Analyzer 83
Exporting Symbol Patterns
Exporting Symbol Patterns
If the signal data has been acquired with a compatible pattern mode
(“Repetitive (unknown)”, “PRBS” or “user-defined”), you can export the
actual symbol pattern to a file and reuse it for other acquisitions.
Note: Exporting the symbol pattern from an acquisition in Repetitive mode is
especially useful, since you can reimporting it to obtain better calculations
and a symbol error rate. See Importing User-Defined Symbol Patterns on
page 84.
The exported file (.osp) is in tab-delimited text format. Here is an example
of an exported dual-polarization QPSK symbol pattern, opened in Notepad:
To export a symbol pattern:
1. Select the desired burst (using Playback) from an acquisition made
with a compatible input pattern mode.
2. From the File menu, select Export, then Symbol Pattern.
3. Indicate the location where you want to save the file.
One line per symbol
I an Q values
for polarization X
I an Q values
for polarization Y (if applicable)
Line number