High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-
V characteristics of FETs
2470-900-01 Rev. B / August 2019 6-13
Remote control of FET testing using TSP commands
The following TSP code is designed to be run from Keithley Instruments Test Script Builder (TSB).
You can install and use TSB to write code and develop scripts for TSP-enabled instruments.
Information about how to use TSB is in the online help for TSB and in the “Introduction to TSP
operation” section of the Model 2470 Reference Manual.
By default, the 2470 uses the SCPI command set. You must select the TSP command set before
sending TSP commands to the instrument.
To enable TSP commands:
1. Pr
ess the MENU key.
2. Under System, select Settings.
3. Set the Command Set to TSP.
4. At the prompt to reboot, select Yes.
Set up the drain leakage current measurement using TSP
commands
The following TSP code performs a drain leakage measurement on a FET by sourcing 600 V and
measuring the resulting leakage current. The DurationLoop trigger model template applies the voltage
for 60 s and makes measurements at 200 ms intervals.
After the code is executed, the measurement results are displayed in the Instrument Console of Test
Script Builder. From the Instrument Console, you can copy the data into a spreadsheet for graphing.
Send the following commands for this example application:
-- Reset the instrument, which also clears the buffer.
reset()
-- Set up the source function.
smu.source.func = smu.FUNC_DC_VOLTAGE
smu.source.ilimit.level = 10e-3
smu.source.level = 600
-- Set up measure function.
smu.measure.func = smu.FUNC_DC_CURRENT
smu.terminals = smu.TERMINALS_REAR
smu.measure.autorange = smu.ON
smu.measure.nplc = 1
-- Turn on the output and initiate readings.
trigger.model.load("DurationLoop", 60, 0.2)
trigger.model.initiate()
-- Wait for the trigger model to complete.
waitcomplete()
smu.source.output = smu.OFF
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