Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 4: Sourcing and measuring
2601B-PULSE-901-01A April 2020 4-75
List sweep example
The SMU programming example below illustrates a list sweep.
-- Restore 2601B-PULSE defaults. This disables the pulser.
smua.reset()
-- Set compliance to 10 mA.
smua.source.limiti = 10e-3
-- Define voltage list.
vlist = {3, 1, 4, 5, 2}
-- Define list sweep with 3 V, 1 V, 4 V, 5 V, and 2 V steps
-- with a 0.1 s delay; 5 points.
SweepVListMeasureI(smua, vlist, 0.1, 5)
-- Request readings from buffer 1.
printbuffer(1, 5, smua.nvbuffer1.readings)
Relative offset
When making measurements, you may want to subtract an offset value from a measurement.
The relative offset feature subtracts a set value or a baseline reading from measurement readings.
When you enable relative offset, all measurements are recorded as the difference between the actual
measured value and the relative offset value. The formula to calculate the offset value is:
Displayed value = Actual measured value − Relative offset value
When a relative offset value is established for a measure function, the value is the same for all ranges
for that measure function. For example, if 0.5 A is set as a relative offset value on the 1 A range, the
relative offset value is also 0.5 A on the lower current ranges. Also, on the 1 A range, the
2601B-PULSE still overflows for a more than 1.02 A input.
When relative offset is enabled, the REL indicator turns on. Changing measurement functions
changes the relative offset value to the established relative offset value and state for that
measurement function.
Front panel relative offset
Enabling and disabling relative offset
The relative offset feature can be used to establish a zero (0) baseline. To enable and use this
feature, press the REL key on the front panel. The reading (which becomes the relative offset value)
is subtracted from itself, causing the meter to zero the display. The reading is then stored for use with
subsequent measurements. Pressing the REL key a second time disables the relative offset.
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