Chapter 3 173
Instrument Functions: M - O
Marker
Instrument Functions: M - O
The difference between Span Pair and Delta modes is that in Span Pair mode the reference
marker stays on the trace and you can adjust its trace point.
Once positioned, the markers stay on the trace points on which they have been placed.
Changing the frequency or time of the analyzer does not change the trace point of the
markers, that is, they stay at the same horizontal position on the display.
You cannot move the markers off the screen. If you adjust either center or span to a value
that would cause one of the markers to move off screen, the marker will be placed at the
right or left side of the display, on the trace. Changing the Center marker changes the
center point of the two markers. This function is useful in functions such as Band Power.
Key Path:
Marker
Range: Refer to the [:SENSe]:SWEep:POINts command under “Points” on page
240.
Remote Command:
See “Marker” on page 167 for the command to select the control mode.
:CALCulate:
MARKer[
1]|2|3|4
:X:POSition
:CENTer
<param>
Sets the mid point of the markers to a specific trace point.
:CALCulate:MARKer[1]|2|3|4:X:POSition:CENTer?
Returns the midpoint trace point.
:CALCulate:MARKer[1]|2|3|4:X:POSition:SPAN <param>
Sets the spacing between the markers to a specified number of trace points.
:CALCulate:MARKer[1]|2|3|4:X:POSition:SPAN?
Returns the spacing of the markers in trace points.
:CALCulate:MARKer[1]|2|3|4:X:CENTer <param>
Sets the mid point of the markers to a specific frequency with a range that matches the
units of the trace on which the markers are positioned.
:CALCulate:MARKer[1]|2|3|4:X:CENTer?
Returns the midpoint frequency.
:CALCulate:
MARKer[
1]|2|3|4
:X:SPAN <pa
ram>
Sets the spacing between the markers to a specified frequency with a range that matches
the units of the trace on which the markers are positioned.
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