Keysight N9923-90001 User’s Guide175Data Analysis FeaturesAll about MarkersFigure 12-1 Marker 2 is Active, marker 1 is NOT active.About Delta MarkersA delta marker provides X-and Y-axis readout information that is relative to a‘reference’ marker.A delta marker is created with a Δ (delta symbol) to distinguish it from thereference marker.All six markers can be delta/reference marker pairs.Peak search functions can be performed using delta markers. The delta markermoves to the peak; the reference marker does NOT move.Figure 12-2 A Delta marker and its associated reference marker.In the graphic above, the marker readout shows the difference between thetwo markers in frequency and amplitude.
