Online help page Online help page How to modify the source parameter – Click on the source drawing in the bottom panel. You will get this: – Then choose the Modify Parameters field. A frame appears: – You can change the impedance of the source by clicking on the checkboxes and writting a value in the text fields. – You can change the run time of the simulation (default value means infinite run time) – You can choose between 3 types of input signals:           Gaussian pulse:           Differential Gaussian pulse:           Sine Wave: