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Generalized Load Pull Contours from Combined Values: G_LPCM_C2

Summary

G_LPCM_C2 is similar to G_LPCM except that it uses multiple data values to create contours that can show the best trade-off between two quantities (for example, PAE and PLoad). This measurement requires two specified data sources. Each data source has a threshold and step size. If only one contour value is specified, the single contour that is drawn should be where both data sources meet their threshold criteria. If two contours are specified, the second contour is drawn where both data sources meet their threshold criteria plus their step sizes. If three contours are specified, the third contour is drawn where both data sources meet their threshold criteria minus their step sizes. As more contours are specified, the additional contours are alternately added as higher and lower values. When only a single contour is drawn, the step sizes for both quantities should be made relatively small, as this can reduce the interpolation error for the generated surface that is contoured. If the contour that is generated does not appear to match the individual contours as well as expected, try decreasing the step sizes for both quantities.

The following figure shows the measurement with two contours specified. The dark red trace shows the values where both quantities meet their thresholds. The lighter red curve shows the values where both quantities meet their thresholds plus the step sizes specified for the quantities.

Parameters

Name Type Range
Load Pull Data File Name Subcircuit A/B Wave load pull file or Derived Value Load Pull File
Data for contour 1   Calculated Values
Threshold 1    
Step for 1   When Max number of contours > 1, the contours are automatically generated based on even multiples of the step size. When Max number of contours = 1, this value is used for the contour 1 value.
Data for contour 2   Calculated Values
Threshold 2    
Step for 2   When Max number of contours > 1, the contours are automatically generated based on even multiples of the step size. When Max number of contours = 1, this value is used for the contour 2 value.
Max number of contours Real -500 to 500; if 1, Step for x is used to specify the value.
Z0, real (ohms) Real 0.1 to 2500; the normalization impedance used to display the contours on the Smith Chart.
Z0, imag (ohms) Real -2500 to 2500; the normalization impedance used to display the contours on the Smith Chart.

Options

In addition to the standard parameters, you may need to specify the following swept parameters.

Sweep Description
iPower Index into the values used for swept power.
harm Specifies which harmonic to use.

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