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The following figure shows the Graphical Tuning window and introduces some terminology.
Graphical Tuning Window

Bode and Nichols plots in the graphical tuning window automatically display the following information:
Gain margin and the -180 degree phase crossing frequency where it is measured
Phase margin and the 0 dB gain crossing frequency where it is measured
Whether the characteristic equation 1+L is stable (Stable loop) or unstable (Unstable loop). L is the open loop plotted in the figure.
This section describes the Graphical Tuning window features left-to-right and top-to-bottom, starting with the menu bar and ending with the status pane at the bottom of the window.
![]() | Using the SISO Design Task in the Controls & Estimation Tools Manager | Using the Graphical Tuning Window Menu Bar | ![]() |

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