Source

This allows voltage and current sources to be added. For voltage sources the user specifies the element and segment numbers and the value of the voltage source. The segment will be shown (highlighted) in the Graph Window each time the element or segment number is changed. The segment number is set to the centre segment each time the element number is changed.

For a current source the user must type in the position of the source and the angles (``Alpha'' and ``Beta'') defining its orientation. The definition of the angles is shown if the cursor is pointed at either label. In this case the user must click on the Show to visualise the source. The co-ordinate position of the current source is shown by a dot in the Graph Window and the orientation is indicated by a short line in the positive direction of the source.