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Models 2500 and 2502 User’s Manual SCPI Command Reference 17-71

DIRection <name>

:SOURce[1]:SWEep:DIRection <name> Set direction of source 1 sweep

:SOURce2:SWEep:DIRection <name> Set direction of source 2 sweep

Parameters <name> = UP Run sweep from start to stop

DOWN Run sweep from stop to start

Query :DIRection? Query direction of sweep

Description Normally, a sweep is run from the start level to the stop level. The

:STARt and :STOP, or :CENTer and :SPAN commands are used to set

these levels.

This command lets you change the execution direction of the sweep.

With DOWN selected, the sweep will begin at the stop level and end at

the start level. Selecting UP restores sweep operation to the normal start

to stop direction.

Conﬁgure list

VOLTage <NRf list>

:SOURce[1]:LIST:VOLTage <NRf list> Deﬁne source 1 list

:SOURce2:LIST:VOLTage <NRf list> Deﬁne source 2 list

Parameters <NRf list> = NRf, NRf … NRf

NRf = -100 to 100 Source value (volts)

Query :VOLTage? Query source list

Description These commands are used to deﬁne a list of source values (up to 100)

for the list sourcing mode of operation. When operation is started, the

instrument will sequentially source each voltage value in the list. A cur-

rent measurement is performed at each source level.

The following command shows the proper format for deﬁning a list

using source values of 10V, 13V, and 5V:

:SOURce[1]:LIST:VOLTage 10, 13, 5

If using manual source ranging, you can use auto range for source val-

ues that are not within a single range.

NOTE In order to execute a source list, the selected source must be in the list sourcing

mode, and the product of the arm and trigger count should be at least the same

as the number of source points in the list.

Use the VOLTage:MODE command to select the LIST sourcing mode.

See “Select sourcing mode,” page 17-61. The trigger count is set using

the TRIGger:COUNt command. See “Trigger subsystem,” page 17-90.

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Keithley 2500 User Manual

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