Cursors

When you display signals in graph or chart displays on the Data View tab, you can use cursors to determine specific values within the signals. Right-click a graph and select Visible Items»Cursors from the shortcut menu to add cursors to the graph and display a cursor legend below the graph. The cursor legend displays the x- and y-values of the signal at the point where each cursor intersects the signal, the slope between the x- and y-values, and the inverse and derivative values of the slope.

Cursors appear as perpendicular lines that intersect at a point on the plot of a signal. When you add cursors to a graph, LabVIEW SignalExpress always displays two cursors, and the cursors always are linked to a plot on the graph so that the cursor remains aligned with the signal when you move the cursor. If the graph contains multiple signals, LabVIEW SignalExpress links the cursors to the plot of the first signal in the signal order by default.

Changing Cursor Position

When you add cursors to a graph, LabVIEW SignalExpress enables the Cursor Movement Tool on the graph palette automatically. With the Cursor Movement Tool enabled, you can drag cursors to different positions on the plot of a signal. You also can right-click the graph and select Cursor Name»Set Position to move the vertical cross hair of the cursor to the location where you right-click the graph.

Finding Peak Values

You can use cursors to find peak values of a signal. Right-click the graph and select Cursor Name»Next Peak or Cursor Name»Previous Peak to move the cursor to the corresponding peak value. Use the Cursors page of the Display Properties dialog box to define the peak threshold and peak width that a cursor uses to recognize peak values.

Changing Linked Plots

If a graph contains multiple signals, you can change the signal plot to which a cursor is linked. To change the linked plot of a cursor, click the signal name in the cursor legend and select a signal from the shortcut menu, right-click a cursor in the cursor legend and select Link To Plot»Plot name from the shortcut menu, or right-click the graph and select Cursor Name»Link To Plot»Plot name from the shortcut menu. You also can use the Linked to plot pull-down menu on the Cursors page of the Display Properties dialog box to change the linked plot of a cursor.

Customizing Cursors

After you add cursors to a graph, you can use the Cursors page of the Display Properties dialog box to customize the style, appearance, orientation, and behavior of the cursors. You also can use this page to specify values a signal must cross before LabVIEW SignalExpress recognizes peak values, export measurement values from the cursor legend to use as step inputs, and bind exported cursor measurements to step parameters so the parameter to which you bind a cursor measurement updates to use the value of the measurement.

To display the Cursors page, right-click a cursor in the cursor legend and select Cursor Properties from the shortcut menu or right-click the graph and select Cursor Name»Properties from the shortcut menu.

Note  You also can click the Properties button on the Data View tab or right-click a display and select Properties from the shortcut menu to display the Display Properties dialog box, then navigate to the Cursors page.