Technical data

Marker 11
Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz 209
The above commands set the reference (Start), or delta (Stop) marker X locations on the X
axis. The markers can be placed on the X axis using the current trace units. Or you can
specify their position in display points. Display points are values from 0 to 600 (or the
current number of points in the sweep). The marker must already be on.
:CALCulate:MARKer[1]|2|3|4:X:STARt?
:CALCulate:MARKer[1]|2|3|4:X:STOP?
:CALCulate:MARKer[1]|2|3|4:X:POSition:STARt?
:CALCulate:MARKer[1]|2|3|4:X:POSition:STOP?
These commands return the reference (Start), or delta (Stop) marker X value in current X
axis units, or the by its position in display points.
Example:
CALC:MARK3:MODE BAND activates or selects marker 3 and sets it to Delta Pair. Refer
to “Marker" on page 203.
CALC:MARK3:X:POS:STAR 0 moves the reference marker 3 to the left edge of the
display.
Span Pair
Sets the control mode for the selected marker to Span Pair (see “Marker" on page 203). In
Span Pair mode the display shows the difference between the delta marker and a reference
marker and enables you to adjust both the ref and delta markers. The start marker number
is indicated with a number and an R above the marker (for example, 1R) and the stop
marker is indicated with a marker number. You can control the two markers (under the
Markers tab) in the lower portion of the right pane using the Center and Span scroll bars.
Adjusting the Span changes the frequency difference between the two markers. Adjusting
Center maintains the marker spacing and changes the frequency of the midpoint between
the markers. Adjusting the span changes the frequency difference between the two
markers while maintaining the midpoint between the two markers at a fixed frequency.
Changing the center changes the center point between the two markers while maintaining
the frequency difference.
There are four conditions that can occur when Span Pair mode is selected:
If marker mode is Off, the delta marker and reference marker are placed at the center of the
display.
If marker mode is Normal, the delta marker and reference marker are placed at the current
marker position on the trace.
If the marker mode is Delta, the current marker position remains unchanged and the
reference marker is placed on the trace at the reference marker position.
If the marker mode is Delta Pair, the marker positions remain unchanged.