8: TSP command reference Model 2450 Interactive SourceMeter® Instrument
8-122 2450-901-01 Rev. B/September 2013
Details
When relative measurements are enabled, all subsequent measured readings are offset by the relative offset
value calculated when you acquire the relative offset value.
Each returned measured relative reading is the result of the following calculation:
Display value = Actual measured value - Relative offset value
Example
smu.measure.func = smu.FUNC_DC_VOLTAGE
rel_value = smu.measure.rel.acquire()
smu.measure.rel.enable = smu.ON
Acquires a relative offset level value for voltage
measurements and turns the relative offset
feature on.
Also see
Relative offset (on page 3-1)
smu.measure.rel.acquire() (on page 8-121)
smu.measure.rel.level (on page 8-122)
smu.measure.rel.level
This attribute contains the relative offset value for measurements.
Type TSP-Link accessible Affected by Where saved Default value
Instrument reset
Power cycle
Measure configuration list
Measure configuration list
Usage
relValue = smu.measure.rel.level
smu.measure.rel.level = relValue
Relative offset value for measurements:
• Current: −1 to 1
• Resistance: –200000000 to 200000000
•
−
Details
This command specifies the relative offset value that is used for measurements. When relative offset is enabled,
all subsequent measured readings are offset by the value that is set for this command.
Example
smu.measure.func = smu.FUNC_DC_CURRENT
smu.measure.rel.level = smu.measure.read()
smu.measure.rel.enable = smu.ON
Sets the measurement function to current,
performs a current measurement, uses it as
the relative offset value, and enables the
relative offset for current measurements.
Also see
Relative offset (on page 3-1)
smu.measure.rel.acquire() (on page 8-121)
smu.measure.rel.enable (on page 8-121)
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