Parameter Defaults Tab (Design Properties Dialog Box)

Use this tab to add, edit, or remove properties, and set the default values for design parameters.

Value Option

Select this radio button to display, and set the default values for these component parameters used during general analysis:

• Name –This column displays the names of component parameters. Names can be edited for case only.
• Value – This column lets you change the initial values of parameters.
• Unit – This column lets you set the unit of measure for the parameter value.
• Evaluated Value – This read-only column displays the evaluated value of the parameter.
• Description – This column lets you enter a description for the parameter.
• Netlist Unit – This column lets you set the unit of measure used when the parameter is netlisted.
• Callback – Click Callback to associate a callback script with the parameter.
• Read-only – This check box controls whether the parameter settings can be changed.
• Show Hidden – This check box controls whether the parameter is hidden by default.
• Property Type – Displays the type (for example, Real) for generic properties.
• Show Pin – This check box lets you show a pin for the property on the component’s symbol.
• Sweep – This check box enables the value for sweep.
• Default SDB – This check box enables the value to be stored in the project SDB.

Statistics Option

Select this radio button to display and set the values for these design parameters applicable to statistical analysis.

• Name – This column displays the names of component parameters.
• Include – This check box controls whether the associated component parameter will be varied during statistical analysis. Select Include for each parameter you want Twin Builder to vary during statistical analysis.
• Distribution – This setting displays and controls whether the parameter value distribution is Uniform, Gaussian, lognormal, or user-defined. To change the Distribution setting, click the cell to display and choose the options.
• Distribution Criteria – Click the button in this column to open the Edit Distribution dialog box in which you can set distribution criteria. The Distribution Type drop-down menu displays whether the distribution is Uniform or Gaussian, and you can specify values for Cutoff Probability, Mean, and Tolerance. Units for Mean and Tolerance can be set using their adjacent drop-down menus.