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Constellation diagrams

AV20241030842

I would like to visualize the output of a n-port passive network as a constellation diagram. I have the necessary snp files to create sub circuits and build the n-port network. But when I try to add a graph with the type as constellation, I do not get the Complex option highlighted in the choices. Do I need to use a signal generator at the input port instead of just using a port and looking at the output as voltage or can I use the s-parameters of the output port I am interested in? 

  • Constellation graphs plot the real and imaginary parts of a complex-valued signal against each other, usually with time as an implied parameter.  Is this what you have in mind for this measurement?

    I suspect that you may instead have in mind a Rectangular - Real/Imag Graph for your particular application.

    Can you review Section 6.1 (and particularly Section 6.1.2.2) of the AWR User Guide (available in the AWRDE by going to Help > Manuals, and then searching for some combination of terms such as "6.1 working with graphs") and let us know if this is what you have in mind?

  • in reply to CurtisAWR

    When I select the Constellation option in the graph ( which is what I want to plot IQ data), I do not see the "Complex" option available to me. Do you have any example projects that plots the IQ data that I can look at to see how the setup is done and what the parameters of the driving source need to be? I might be missing something fundamental here

  • in reply to AV20241030842

    We have several shipped example projects showing IQ data plotted, among them:

    • 16QAM_EVM_IQ_Imbalance.emp
    • 8PSK_and_MWO_AMP.emp
    • Basic_QPSK_BER.emp
    • ...plus more

    I would recommend that you go to File > Open Example, and then search in the Keyword and/or the Name column for relevant search terms.

    As mentioned in the section on Graphs, Measurements, and Output Files from our User Guide, the horizontal axis shows the real part of the signal, while the vertical axis shows the imaginary part.

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