Once you have completed the setup of your analysis, you may check for potential box resonances before you run the analysis. To do this, select Sonnet ⇒ Analysis ⇒ Estimate Box Resonances from the main menu in the layout window.
When you select this command, Sonnet checks your circuit for possible box resonances and outputs the frequencies at which they would occur to the Estimate Box Resonances Results window. If no box resonances are found the message ''None found at or below highest analysis frequency.'' is output to the dialog box.
For a detailed discussion of package resonances, see Box Resonances in the Sonnet User’s Guide.