2600S-901-01 Rev. C / January 2008
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7-9
Series 2600 System SourceMeter® Instruments Reference Manual
Section 7: Buffer (Data Store)
Buffer programming examples
Defined buffer example
The listing below shows a programming example for storing data using the pre-defined Buffer 1 for
Channel A. The SourceMeter loops for voltages from 0.01V to 1V with 0.01V steps (essentially
performing a staircase sweep), stores 100 current readings and source values in Buffer 1, and
then recalls all 100 readings and source values.
smua.reset()
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Restore Series 2600 defaults.
display.screen = 0
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Select Channel A display.
display.smua.measure.func =
display.MEASURE_DCAMPS
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Display current.
smua.measure.autorangei = smua.AUTORANGE_ON
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Select measure I auto range.
format.data = format.ASCII
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Select ASCII data format.
smua.nvbuffer1.clear()
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Clear Buffer 1.
smua.nvbuffer1.appendmode = 1
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Enable append buffer mode.
smua.nvbuffer1.collectsourcevalues = 1
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Enable source value storage.
smua.measure.count = 1
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Set count to 1.
smua.source.func = smua.OUTPUT_DCVOLTS
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Select source voltage function.
smua.source.levelv = 0.0
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Set bias voltage to 0V.
smua.source.output =smua.OUTPUT_ON
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Turn on output.
for v = 0.01, 1.0, 0.01 do
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Loop for voltages from 0.01 to 1V.
smua.source.levelv = v
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Set source voltage.
smua.measure.i(smua.nvbuffer1)
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Measure current, store in buffer.
waitcomplete()
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Wait for reading to complete.
end
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End loop.
smua.source.output =smua.OUTPUT_OFF
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Turn off output.
printbuffer(1, 100, smua.nvbuffer1.readings)
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Return readings 1-100.
printbuffer(1, 100,
smua.nvbuffer1.sourcevalues)
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Return source values 1-100.
