Section 7: TSP command reference
Series 2600B System SourceMeter® Instrument Reference Manual
7-202
2600BS-901-01 Rev. C / August 2016
Example
smua.cal.password = "LetMeIn"
Assigns a new calibration password for SMU channel A.
Also see
(on page B-18)
smuX.cal.polarity
This attribute controls which calibration constants are used for all subsequent measurements.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Instrument reset
SMU reset
SMU cal. lock
Recall setup
Not saved
0 (smuX.CAL_AUTO)
Usage
calPolarity
= smu
X
.cal.polarity
smu
X
.cal.polarity =
calPolarity
calPolarity
The polarity to use for measurements. Set to one of the following values:
0
or
smu
X
.CAL_AUTO
: Automatic polarity detection
1
or
smu
X
.CAL_POSITIVE
: Measure with positive polarity calibration constants
2
or
smu
X
.CAL_NEGATIVE
: Measure with negative polarity calibration constants
X
SMU channel (for example,
smua.cal.polarity
applies to SMU channel A)
Details
This attribute controls which polarity calibration constants are used to make all subsequent
measurements. This attribute does not affect the
smu
X
.measure.calibrate
Y
()
or
smu
X
.source.calibrate
Y
()
commands. The polarity for those commands is dictated by the
range parameter that is given to the command. The measurement calibration commands require the
measurements provided to have been made using the polarity being calibrated.
When making measurements for calibration points far away from zero, the desired polarity constants
are inherently used. However, when making measurements near zero, it is possible that the
instrument could use the calibration constants from the wrong polarity. Setting
smu
X
.cal.polarity
to positive or negative forces measurements to be made using the calibration constants for a given
polarity, rather than basing the choice on the raw measurement data.
This attribute can only be set to positive or negative when calibration is unlocked. This attribute will
automatically be set to
smu
X
.CAL_AUTO
when calibration is locked.
Example
smua.cal.polarity = smua.CAL_POSITIVE
Selects positive calibration constants for all
subsequent measurements on SMU channel A.