This Simulation displays the Magnitude Response and the Phase Response for a pair of Poles or Zeros that can be traced with the movement of the cursor. 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 cursor can be placed anywhere inside the rectangular box and the frequency response for the corresponding pair of Zeros or Poles is computed and displayed. The coordinates are displayed in the upper left hand corner. The valleys and peaks are clearly observed. The program displays the frequency response only if the cursor is placed within the rectangular box, outside that the cursor position, Zeros or Poles and the frequency response disappears. The conjugate of the Zero or Pole placed is also displayed on the Screen.

The Frequency Response of a pair of Poles or Zeros can be viewed by choosing either of the appropriate selection Zero or Pole. 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. The dB scale displays the normalized Amplitude Response. The magnitude response The Magnitude and Phase Response are computed between -pi to pi.