About Delta Markers - Keysight A Series User Manual

Figure 29-1 Marker 2 is Active, marker 1 is NOT active.

About Delta Markers

A 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 the reference marker.
All six markers can be a Delta marker pair.
Peak search functions can be performed using delta markers.
Figure 29-2 A Delta marker and its associated reference marker.
In the graphic above, the marker readout shows the difference between the two markers in
frequency and amplitude.
Keysight N9927-90020 User's Guide
Data Analysis Features
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