This Simulation displays the Magnitude Response and the Phase Response for upto 5 pairs of Poles and Zeros. A snapshot of the Simulation screen is shown below. The unit circle of the Z-plane is displayed with the Real and Imaginary axis. The Zeros are represented by filled circles while the Poles are displayed by crosses. The Zeros or Poles can be placed anywhere within the rectangular box, the coordinates are displayed in the bottom left hand corner and is labelled as Cursor Position. Taking the cursor outside the rectangle displays an outside range message. The conjugate of the Zero or Pole placed is also displayed on the Screen.

The Back Track button as its name implies can be used when an error occurs in the placement of a Zero or a Pole. The Display Frequency Response button is used to display the Magnitude Response and the Phase Response, once all the Zeros and Poles are positioned. The Magnitude Response can be displayed either in the linear scale or in dB scale, this is done by marking either Linear Scale or Decibel Scale which is present over the Display Frequency Response button. Both the Magnitude and Phase Response are computed between -pi to pi.

The number of pairs of Zeros or Poles needed can be adjusted using the Zeros scroll bar and Poles scroll bar. Adjusting the Zero scrollbar after placing the Zeros or the Poles scrollbar after placing Poles has no effect on that simulation. It is advisable to Reset and then change the values of the scrollbar. The Reset button is also used to start a simulation afresh.