Keithley 2657A - Page 132

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)