S-Parameters Real-Time Measurements Display

Once the configuration of S-parameters is completed, the setup must be initialized () to access the measurement button (). IQSTAR uses the measurement configuration to set the instruments and run the sequence.



Note: Scroll the mouse wheel in order to zoom in/out on the graph.

Results are displayed during the measurements. IQSTAR proposes many configurations in order to monitor the DUT characterization in real-time.

  • Windows display: from top left side of the window, it's possible to modify the graphics layout


  • History: during the measurements, it is also possible to display on the real-time measurement windows previous results using the 'History' menu.


  • Graph configuration: each graph can be separately configured
    • Click on to configure the graph type and the data to plot


      • Families: select the parameter type, scattering [S], admittance [Y] or impedance [Z]
      • Curves: select the parameter to display and the graph type ('Magnitude (dB)/Frequency (GHz)', 'Phase (°)/Frequency (GHz)', 'Smith Chart'...)
      • Data: select the data of interest
    • Click on to add markers on the graph


      • Predefined marker: show or hide the maximum or/and minimum value of the graph
      • Custom: set a label and the frequency of the custom marker
      Note: To move marker tool-tip on the graph, keep the mouse wheel pressed and move the marker tool-tip anywhere on the graph..
    • Click on to configure graph axis and curve settings


      • Autoscale: If checked, the graph will automatically rescale itself when a new curve is injected. During a measurement, as points are injected periodically, the graph will rescale itself at each new point injection.
      • Custom: If checked, allows to configure the axis min and max values, as well as the grid / labels step
      • Show grid
      • Spline curves: Allows or not the curve fitting to be represented as a spline. If not, simple lines are linking points.

    Note: is used to split the screen between the graph and the configuration, (configuration panel must be select first).
  • Visualization profile: when the layout and graphs are correctly set, save the frame in a profile at the bottom right of the window. Thanks to the list, check, refresh, save and delete button, it's possible to manage profiles. Profiles are also available in the S-Parameters viewer.