2500A Chapter 3: Remote Operation
74 2500A Series Operation Manual, 34172 Revision C, March 2008
[SOURce]:LIST:DIRection? Queries the currently set list run direction. The return value is as
follows:
UP The list is set to run from start to end.
DOWN The list is set to run from end to start.
[SOURce]:LIST:DWELl
<t1>,<t2>,……,<tn>
Specifies the dwell point times (<t1>,<t2>,……,<tn>) of the list set,
the dwell point times are delimited by commas. The 2500A list dwell
setting is global for all list points. The first dwell time parameter
applies to all subsequent points. Setting additional dwell times is
optional. The units are seconds.
[SOURce]:LIST:DWELl:POINts? Queries the number of points in the dwell time list.
[SOURce]:LIST:FREQuency
<f1>,<f2>,<f3>,……,<fn>
Specifies the frequency points (<f1>,<f2>,<f3>,……,<fn>) of the list
set. The frequency points are delimited by commas.
[SOURce]:LIST:FREQuency:POINts? Queries the number of points currently in the frequency list.
[SOURce]:LIST:POWer
<p1>,<p2>,<p3>,……,<pn>
Specifies the power points (<p1>,<p2>,<p3>,……,<pn>) of the list
set. The power points are delimited by commas.
[SOURce]:LIST:POWer:POINts? Returns the number of points currently in the power list
[SOURce]:LIST:PRECompute Converts (pre-computes) the source data of the list saved in NVRAM
into object format, which is directly readable by the hardware.
Note: In firmware releases less than version 2.82, the syntax for this
command is [SOURce]:LIST:PRECompute? (the query form).
[SOURce]:LIST:REPeat
SWEEp|STEP|CONTinuous
Sets the repeat mode for the current list. The choices are as follows:
SWEEp Upon triggering, the entire list is executed from the
beginning, then execution stops.
STEP Upon triggering, the current list point is executed,
then execution stops. The next trigger executes the
next point in the list. The list’s first point is considered
to be the initial current point, and the point following
the list’s final point.
CONTinuous The entire list repeats indefinitely.
[SOURce]:LIST:REPeat? Queries the repeat mode of the current list
[SOURce]:LIST:SEQuence
<m1>,<m2>,<m3>,…..,<mn>
Defines a sequence for stepping through the existing list when
[SOURce]:LIST:SEQuence:AUTO is set to OFF. The points
specified in this command (<m1>,<m2>,<m3>,…..,<mn>) are indexes
into a new sub-list, and only points in this sub-list will be triggered.
For example, if one of the indexes defined with this command is 3,
then the third point in the frequency, dwell, and power lists will be
sequenced.
[SOURce]:LIST:SEQuence:POINts? Queries the number of points in the sequence list
[SOURce]:LIST:SEQuence:AUTO
ON|OFF
Sets list sequence AUTO mode. The choices are as follows:
ON The list sequence set with the [SOURce]:LIST:SEQuence
command will not take effect, so all list points will run when
triggered.
OFF The list will run only the points set with the
[SOURce]:LIST:SEQuence command.
The default is ON.
Note: This command is also used to change the 2500A mode from
CW or Ramp to List mode. Example: LIST: SEQ: AUTO ON
switches to List Mode
Table 3-7: Source Subsystem - List Mode SCPI Commands
Command Syntax Description
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