Agilent Technologies E4446A User Manual

172 Chapter 3
Instrument Functions: M - O
Marker
Instrument Functions: M - O
Remote Command:
See “Marker” on page 167 for the command to select the control mode.
:CALCulate:MARKer[1]|2|3|4:X:POSition:STARt <param>
:CALCulate:MARKer[1]|2|3|4:X:POSition:STOP <param>
Sets the reference (Start), or delta (Stop) marker X position to a specified point on the X
axis in display points (values of 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:POSition:STARt?
:CALCulate:MARKer[1]|2|3|4:X:POSition:STOP?
Returns the reference (Start), or delta (Stop) marker X 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 167.
CALC:MARK3:X:POS:STAR 0 moves the reference marker 3 to the left edge
of the display.
3.1.5 Span Pair
Sets the control mode for the selected marker to Span Pair (see “Marker” on page 167). 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. After you turn on the Span Pair function,
pressing the key again toggles between the two marker parameters you are controlling,
span and center.
Adjusting the Span (Span is underlined) changes the frequency difference between the two
markers. Adjusting Center (Center is underlined) 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.

Agilent Technologies E4446A Specifications

General

Brand	Agilent Technologies
Model	E4446A
Category	Measuring Instruments
Language	English