Check for the example library of OptiSystem. One directory is for advanced modulation. It can be found at:
C:\Users\xxxxxx\Documents\OptiSystem 15.2 Samples\Advanced modulation systems\PSK systems\QPSK
There are few examples on QPSK.
Which block do you refer to?
Do you mean load a physical signal from an instrument?
There is a work around loading experimental data to the project in OptiSystem. Please contact me at firstname.lastname@example.org.
Which version of OptiSystem are you using?
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