Keithley 2520, Руководство пользователя, Страница: 230 / 329

Model 2520 User’s Manual SCPI Command Reference 14-41
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
The list commands allow you to program a custom sweep of up to 100 points. Each point
can be individually programmed for pulse amplitude, pulse width, and pulse delay.
CURRent <NRf list>
:SOURce[1]:LIST:CURRent <NRf list> Define current list
Parameters
<NRf list> = NRf, NRf … NRf
NRf =
0 to 5.0 Pulse high amplitude (amps)
Query
:CURRent? Query current list
Description
This command is used to define a list of current pulse values (up to 100)
for the list sourcing mode of operation. When operation is started, the
instrument will sequentially source each current pulse value in the list.
A set of measurements are performed at each current pulse level. The
pulse width and delay are set with the :WIDTh and :DELay commands
(see below). The pulse low level is set with the :LOW command (see
“Set amplitudes,” page 14-34 ).
The following command shows the proper format for defining a list
using source values of 1A, 2A, and 5A:
:SOURce[1]:LIST:CURRent 1, 2, 5
In order to execute a source list, the selected source must be in the list
sourcing mode. Use the :SOUR1:CURR:MODE command to select the
LIST sourcing mode. See
“Select sourcing mode,” page 14-32 .
APPend <NRf list>
:SOURce[1]:LIST:CURRent:APPend <NRf list> Add value(s) to current list
Parameters
<NRf list> = NRf, NRf … NRf
NRf =
0 to 5.0 Source value (amps)
Description
This command is used to add one or more values (up to 100) to a source
list that already exists. The source values are appended to the end of the
list. (By using multiple appended lists, up to 1000 points can be in a
list.)