DC-voltage sweep ACST Design Studio

Hey,
i would like to know how i can make a DC-voltage-sweep in CST Design studio with Current.
I have a simple circuit consist of a diode and i want to see what is the current across the diode with different values of dc voltage.
Does anyone knows, how can i do that ?
Many thanks !

- Draw your circuit, Specify a parameter in the "Parameter List"
- Place a external port. Right-click on "Tasks", -> "New Task" -> "Parameter Sweep"
- Right-Click "Sweep1" from "Tasks" -> "Properties" -> "New-Seq." -> "New Par..." -> specify the range of your parameter
- Right-Click "Sweep1" from "Tasks" -> "New Task" -> "Operating point (DC)"
- Right-Click "OP1" -> "Properties" -> Excitation settings -> Port 1 -> Source "Voltage"
- Run the sweep