RIGOL DSA875 - Manual (Page 133)

Chapter 2 Front Panel Operation RIGOL
User’s Guide for DSA800 Series 2-81
Delta Pair
One of the marker types. When selected, a pair of markers will appear on the trace:
Reference Marker (marked by a combination of the marker number and letter “R”,
such as “1R”) and the Delta Marker (marked by the marker number, such as “1”).
Key Points:
 You can use the numeric keys, knob or direction keys to set the locations of
the reference marker (selecting “Ref”) and the delta marker (selecting “Delta”)
respectively.
 This is different from the Delta type marker in that you can modify both the
reference (selecting “Ref”) and delta (selecting “Delta”) points. Additionally,
both the X and Y values of the reference marker are stable for “Delta” marker
during the sweep; but the Y value of the reference marker updates along with
the sweep for “Delta Pair” marker.
Span Pair
One of the marker types. When selected, a pair of markers will appear on the trace:
Reference Marker (marked by a combination of the marker number and letter “R”,
such as “1R”) and the Delta Marker (marked by the marker number, such as “1”).
Key Points:
 You can use the numeric keys, knob or direction keys to set the locations of
both the reference marker and delta marker at the same time.
 If “Span” is selected, setting the “Span Pair” will keep the center position of
the two markers unchanged and move them towards the two sides (value
increases) or the middle (value decreases).
 If “Center” is selected, setting the “Span Pair” will keep the relative distance
between the two markers unchanged and move their center position left
(value decreases) or right (value increases).
 This is different from the “Delta” type marker in that you can modify both the
reference marker and delta marker at the same time.