The model of the transmitter

In this example, a QAM modulated transmitter is implemented. In addition, this model shows the possibilities of implementing frequency tuning. The operation of frequency tuning is demonstrated by constructing a constellation before and after the phase shift.

To build a constellation, use the graph window and select the display type "Signal Constellation" with the settings listed below.

Constellation before phase shift

Constellation after phase shift

Conclusion

In this example, we have studied the construction of a phase-shifted transmitter system, as well as the tools that allow us to display a constellation in the model.