Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 3: Functions and features
2651A-901-01 Rev. A / March 2011 3-19
Dynamically allocated buffer example
The programming example below illustrates how to store data to an allocated buffer called
mybuffer. The Model 2651A stores 100 current readings in mybuffer and then recalls all the
readings.
-- Restore Model 2651A 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
-- 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 1 V.
smua.source.levelv = 1
-- Turn on output.
smua.source.output = smua.OUTPUT_ON
-- Create a temporary reading buffer.
mybuffer = smua.makebuffer(smua.measure.count)
-- Store current readings in mybuffer.
smua.measure.overlappedi(mybuffer)
-- Wait for buffer to fill.
waitcomplete()
-- Turn off output.
smua.source.output = smua.OUTPUT_OFF
-- Output readings 1 to 100 from mybuffer.
printbuffer(1, 100, mybuffer)
-- Delete mybuffer.
mybuffer = nil
Sweep operation
Overview
The Keithley Instruments Model 2651A High Power System SourceMeter
®
Instrument can generate
DC and pulsed sweeps to perform source-only sweeps, source-and-measure sweeps, or
measure-only sweeps. There are three sweep types shown in the following figure: DC and pulsed
linear staircase sweeps (A), DC and pulsed logarithmic staircase sweeps (B), and DC and pulsed list
sweeps (C). Details about each kind of sweep follow the figure.

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English