Keithley SourceMeter 2470, Руководство пользователя

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Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs
2470-900-01 Rev. A /
May
2019 6-11
SMU 2 :
INIT
*WAI

Initiate the trigger model.

Wait for the model to complete.
Pseudocode vds = []
ids = []
for i = 2, 5 do:

Create an empty array to hold
measured voltage values.

Create an empty array to hold
measured current values.

Set up a
for
loop from 2 to 5
(including 5).
Pseudocode
for SMU2 vds[i-1] = TRAC:DATA? 1 + 51*(i-2),
51*(i-1), "defbuffer1", SOUR
ids[i-1] = TRAC:DATA? 1 + 51*(i-2),
51*(i-1), "defbuffer1", READ

Save the sourced and measured
values to the arrays
vds
and
ids
,
respectively. The readings from
each step are saved at each index
in the array.
Pseudocode end for

End the
for
loop.
Set up the application using SCPI commands in a linear sweep
In this example, the gate voltage steps from 2 V to 6 V in 1 V steps, the drain voltage sweeps from
0 V to 5 V in 51 steps, and the drain current is measured. The application retrieves each of 51
readings and source values from
defbuffer1
and saves them in the arrays
vds
and
ids
,
respectively.
You send commands to either the sweeper (SMU 2) or the stepper (SMU 1). In the table, the
commands for the sweeper are shown with a light gray background. The commands for the stepper
are shown with a darker gray background. The light-brown shaded code represents pseudocode that
will vary depending on the programming environment you use. Each bulleted item in the Description
column describes a single line of code in the Commands column.
Send the following commands for this application:
SMU 1,
SMU 2, or
pseudocode Commands Description
SMU 1
*RST
:SENS:FUNC "CURR"
:SENS:CURR:RANG:AUTO ON
:ROUT:TERM REAR
:SOUR:FUNC VOLT
:SOUR:VOLT:RANG 20

Reset the instrument.

Set to measure current.

Set to measure with autorange
enabled.

Set to use rear terminals.

Set to source voltage.

Set to 20 V source range.