Keithley Interactive SourceMeter 2450 User Manual page 67

Section 7: Measuring I-V characteristics of FETs
Send the following commands for this example application:
--Reset the instruments and the TSP-Link connection, and clear the buffers.
tsplink.initialize()
reset()
node[2].reset()
--If the TSP-Link state is not online, print an error message and quit.
state = tsplink.state
if state ~= "online" then
print("Error:\n-Check that all SMUs have a different node number")
print("-Check that all SMUs are connected correctly\n")
return
end
--Set the number of sweep points (also used for printing).
num = 51
--######################## Model 2450 #1 (drain) setup ################
--Set up the source function.
smu.source.func = smu.FUNC_DC_VOLTAGE
smu.source.ilimit.level = 300e-3
smu.source.autorange = smu.ON
--Set up the measure function.
smu.measure.func = smu.FUNC_DC_CURRENT
smu.measure.autorange = smu.ON
smu.measure.terminals = smu.TERMINALS_REAR
--Set up a linear sweep.
smu.source.sweeplinear("MOSFET", 0, 5, num, 0.001)
--########################## Model 2450 #2 (gate) setup ################
--Set up the source function.
node[2].smu.source.func = node[2].smu.FUNC_DC_VOLTAGE
node[2].smu.source.autorange = node[2].smu.ON
node[2].smu.source.ilimit.level = 100e-3
--Set up the measure function.
node[2].smu.measure.func = node[2].smu.FUNC_DC_CURRENT
node[2].smu.measure.autorange = node[2].smu.ON
node[2].smu.measure.terminals = node[2].smu.TERMINALS_REAR
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Model 2450 Interactive SourceMeter® Instrument User's Manual
2450-900-01 Rev. C / December 2013