Show Center/Span (Frequency)

When the Show Center/Span check box is selected, the trace display shows the Center Frequency and Frequency Span. When the check box is cleared, the trace display shows Start Frequency and Stop Frequency.

The Show Center/Span check box is linked to the Show Center/Span on all Traces check box in the X Scale dialog box. When either box is selected or cleared, the other box also gets selected or cleared.