Getting Variables in VSS to Use Project (User) Units Rather Than Base (SI) Units

There is problem when using a variable (instead of a numerical value) for a parameter in VSS, the units are specified in base (SI) units instead of following the user-specified project units.

To resolve that Go to Options > Project Options from the main menu.

Under the Schematics/Diagrams tab, note that the System diagram dependent parameters use base units option under Unit Normalization is checked by default.

This default setting retains the behavior from previous versions where base (SI) units are used for all variables, and not the user-specified units in the project.

However, if desired, this behavior can be changed to use the user-specified units by unchecking the button for System diagram dependent parameters use base units.

One may also choose to make this behavior permanent for all future sessions.

To do this, go to Options > Environment Options (see figure below) and make the desired changes under the Schematics/Diagrams tab.

To achieve the same setting, you can also right-click on the relevant system diagram file under the project tree and choose Options to display the Project Options dialog box. Here, select the System Diagram tab and ensure that the Use project defaults and Dependent parameters use base units checkboxes are checked/unchecked as per base/project units requirement.

Team SimTech
Cadence Design Systems