ML2439A USB Power Meter User Guide : SCPI Commands : MARKer Subsystem
 
MARKer Subsystem
The MARKer group of commands is used to configure and locate measurement markers (cursors) at specific points on the processed measurement waveform. FETCH? or READ? queries may then be used to retrieve measurements at the two markers and in the interval between them. Markers are used in Pulse Mode to perform measurements at or between two time offsets relative to the trigger, and in
Statistical Mode to measure the power at a particular statistical percent, or the percent at a specified power level. In Pulse Mode, the markers can only be placed on the visible portion of the trace (as defined by the timebase and trigger delay settings), while Statistical Mode markers may be placed at any power or percent value and will still return readings.
MARKer:POSItion:PERcent
Description:
Set or return the percent probability (y-axis-position) of the CCDF cursor. Changing this setting will force the CCDF cursor mode to Percent for display purposes.
READ:
MARKer:CURsor:POWer? and FETCh:MARKer:CURsor:POWer? commands are referenced to this value.
Syntax:
MARKer:POSItion:PERcent? <numeric_value> Argument: <numeric_value> = 0.000 to 100.000
Valid Modes:
Statistical Modes only
 
MARKer:POSItion:POWer
Description:
Set or return the cumulative relative power (x-axis-position) of the CCDF cursor in dBr. Changing this setting will force the CCDF cursor mode to Power Ref for display purposes. READ:MARKer:CURsor:PERcent? and FETCh:MARKer:CURsor:PERcent? commands are referenced to this value.
Syntax:
MARKer:POSItion:POWer? <numeric_value> Argument: <numeric_value> = -100.000 to 100.000Valid Modes: Statistical Modes only
 
MARKer:POSItion:TIMe
Description:
Set or return the time (x-axis-position) of the selected marker relative to the trigger. Note that time markers must be positioned within the time limits of the trace window in the graph display. If a time outside of the display limits is entered, the marker will be placed at the first or last time position as appropriate.
 
 
Syntax:
MARKer[1|2]:POSItion:TIMe <numeric_value>
Argument:
<numeric_value> = display-time in seconds (see restrictions) Valid Modes: Pulse and Modulated Modes
Restrictions:
For zero delay trigger position in the center of the display , the following relationship must be satisfied: TrigDly - (5*time/div) < MarkerTime < TrigDly + (5*time/div) where the timebase setting is time/div