# LABVIEW – SPECIAL PLANES ON THE XY GRAPH

You can display Nyquist planes, Nichols planes, S planes and Z planes on the XY graph.

## DISPLAYING A NYQUIST PLANE

Complete the following steps to display a Nyquist plane.

Step 1: Place an XY graph on the front panel.

Step 2: Double-click the minimum and maximum values on the x– and y-scale and change both minimum values to –1 and both maximum values to 1.

Step 3: Right-click the XY graph and select Optional Plane»Nyquist from the shortcut menu.

Step 4: (Optional) To view the Nyquist plane without labels, right-click the XY graph and remove the checkmark from the Optional Plane»Show Nyquist Labels shortcut menu item.

Step 5: (Optional) To view the Nyquist plane without the Cartesian lines, right-click the XY graph and remove the checkmark from the Optional Plane»Show Cartesian Lines shortcut menu item.

To remove the Nyquist plane, right-click the XY graph and select Optional Plane»None from the shortcut menu. The below Figure shows a Nyquist plane without the Cartesian lines.

## DISPLAYING A NICHOLS PLANE

Complete the following steps to display a Nichols plane.

Step 1: Place an XY graph on the front panel.

Step 2: Double-click the minimum and maximum values on the x-scale and change the minimum value to 0 and the maximum value to 360.

Step 3: Double-click the minimum and maximum values on the y-scale and change the minimum value to –40 and the maximum value to 20.

Step 4: Right-click the XY graph and select Optional Plane»Nichols from the shortcut menu.

Step 5: (Optional) To view the Nichols plane without labels, right-click the XY graph and remove the checkmark from the Optional Plane»Show Nichols Labels shortcut menu item.

Step 6: (Optional) To view the Nichols plane without the Cartesian lines, right-click the XY graph and remove the checkmark from the Optional Plane»Show Cartesian Lines shortcut menu item.

To remove the Nichols plane, right-click the XY graph and select Optional Plane»None from the shortcut menu. The below Figure shows a Nichols plane without the Cartesian lines.

## DISPLAYING AN S PLANE

Complete the following steps to display an S plane.

Step 1: Place an XY graph on the front panel.

Step 2: Double-click the minimum and maximum values on the x-scale and change the minimum value to –1 and the maximum value to 0.

Step 3: Double-click the minimum and maximum values on the y-scale and change the minimum value to –1 and the maximum value to 1.

Step 4: Right-click the XY graph and select Optional Plane»S Plane from the shortcut menu.

Step 5: (Optional) To view the S plane without labels, right-click the XY graph and remove the checkmark from the Optional Plane»Show S Plane Labels shortcut menu item.

Step 6: (Optional) To view the S plane without the Cartesian lines, right-click the XY graph and remove the checkmark from the Optional Plane»Show Cartesian Lines shortcut menu item.

To remove the S plane, right-click the XY graph and select Optional Plane»None from the shortcut menu. The below Figure shows an S plane without the Cartesian lines.

## DISPLAYING A Z PLANE

Complete the following steps to display a Z plane.

Step 1: Place an XY graph on the front panel.

Step 2: Double-click the minimum and maximum values on the x– and y-scale and change both minimum values to –1 and both maximum values to 1.

Step 3: Right-click the XY graph and select Optional Plane»Z Plane from the shortcut menu.

Step 4: (Optional) To view the Z plane without labels, right-click the XY graph and remove the checkmark from the Optional Plane»Show Z Plane Labels shortcut menu item.

Step 5: (Optional) To view the Z plane without the Cartesian lines, right-click the XY graph and remove the checkmark from the Optional Plane»Show Cartesian Lines shortcut menu item.

To remove the Z plane, right-click the XY graph and select Optional Plane»None from the shortcut menu. The below Figure shows a Z plane without the Cartesian lines.