3-10 Return to Section Topics 2600AS-901-01 Rev. B / September 2008
Section 3: Basic Operation Series 2600A System SourceMeter® Instruments Reference Manual
Source-measure programming example
The set-up and command sequence for a basic source-measure procedure is shown below:
• Source function and range: volts, auto range
• Source output level: 5V
• Current compliance: 10mA
• Measure function and range: current, 10mA
smua.reset() -- Restore Series 2600A defaults.
smua.source.func = smua.OUTPUT_DCVOLTS -- Select voltage source function.
smua.source.autorangev = smua.AUTORANGE_ON -- Set source range to auto.
smua.source.levelv = 5 -- Set voltage source to 5V.
smua.source.limiti = 10e-3 -- Set current limit to 10mA.
smua.measure.rangei = 10e-3 -- Set current range to 10mA.
smua.source.output =smua.OUTPUT_ON -- Turn on output.
print(smua.measure.i()) -- Request current reading.
smua.source.output =smua.OUTPUT_OFF -- Turn off output.
Triggering in local mode
It is not necessary to change any trigger settings to use the basic source and measurement
procedures covered in this section, however it is important to reset the instrument before triggering
in local mode.
Use MENU > SETUP > RECALL > INTERNAL > FACTORY to reset the factory default conditions.
Figure 3-2 shows the general sequence for measurement triggering. The basic sequence is as
follows:
• When the output is turned on, the programmed source value is immediately applied to the
device under test (DUT).
• (Front panel operation only) If the immediate trigger source is selected, a measurement will
be triggered immediately. However, if the manual trigger source is selected, the front panel
TRIG key must be pressed.
• The unit waits for the programmed delay period (if any).
• The instrument takes one measurement.
• If the number of measurements is less than the programmed trigger count, it cycles back to
take another measurement (the measurement cycle will be repeated indefinitely if the
infinite trigger count is selected).
• For multiple measurements, the unit waits for the programmed trigger interval (if any) before
taking the next measurement.
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