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FRAX User's Manual
© 2011 Megger Sweden AB
4.3.6 Models...
In the Models dialog, you can select what models to use when a graph is plotted. When using
an active probe, the model for the probe should be used. No other models should be used
together with a probe model. In the dialog below, the SFRA (dB) model is selected. This is the
most commonly used model.
Selected models are shown below the graphs in the main window and can be selected and de-
selected by clicking the small check box.
If "Reference" voltage is Ch0 and Measure voltage is Ch1, the following equations are used in
calculations. Note that all standard models display phase in degrees, but in custom models
defined below phases are in radians (1 radians = 180/Pi degrees)
SFRA (dB)
)0/1(log20
10
ChChMagnitude
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