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Section 3: Functions and features Model 2657A High Power System SourceMeter® Instrument Reference Manual

3-18 2657A-901-01 Rev. B/December 2012

Dual buffer example

The programming example below shows a script for storing both current and voltage readings using

buffer 1 for current and buffer 2 for voltage readings. The Model 2657A stores 100 current and

voltage readings and then recalls all 100 sets of readings.

-- Restore Model 2657A defaults.

smua.reset()

-- Select measure I autorange.

smua.measure.autorangei = smua.AUTORANGE_ON

-- Select measure V autorange.

smua.measure.autorangev = smua.AUTORANGE_ON

-- Select ASCII data format.

format.data = format.ASCII

-- Clear buffer 1.

smua.nvbuffer1.clear()

-- Clear buffer 2.

smua.nvbuffer2.clear()

-- Set buffer count to 100.

smua.measure.count = 100

-- Set measure interval to 0.1 s.

smua.measure.interval = 0.1

-- Select source voltage function.

smua.source.func = smua.OUTPUT_DCVOLTS

-- Output 100 V.

smua.source.levelv = 100

-- Turn on output.

smua.source.output = smua.OUTPUT_ON

-- Store current readings in buffer 1, voltage readings in buffer 2.

smua.measure.overlappediv(smua.nvbuffer1, smua.nvbuffer2)

-- Wait for buffer to fill.

waitcomplete()

-- Turn off output.

smua.source.output = smua.OUTPUT_OFF

-- Output buffer 1 readings 1 to 100.

printbuffer(1, 100, smua.nvbuffer1)

-- Output buffer 2 readings 1 to 100.

printbuffer(1, 100, smua.nvbuffer2)

Keithley 2657A User Manual

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