Tektronix Keithley SourceMeter 2470, Reference Manual

Page: 775 / 995

2470 High Voltage SourceMeter Instrument Reference Manual Section 14: TSP command reference
2470-901-01 Rev. A /
May
2019 14-135
smu.measure.math.format
This attribute specifies which math operation is performed on measurements when math operations are enabled.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Restore configuration
Instrument reset
Power cycle
Measure configuration list
Function change Configuration script
Measure configuration list smu.MATH_PERCENT
Usage
operation = smu.measure.math.format
smu.measure.math.format = operation
operation Math operation to be performed on measurements:

y = mx+b:
smu.MATH_MXB

Percent:
smu.MATH_PERCENT

Reciprocal:
smu.MATH_RECIPROCAL
Details
This specifies which math operation is performed on measurements for the selected measurement
function.
You can choose one of the following math operations:
•
y = mx+b : Manipulate normal display readings by adjusting the m and b factors.
•
Percent : Displays measurements as the percentage of deviation from a specified reference
constant.
•
Reciprocal : The reciprocal math operation displays measurement values as reciprocals. The
displayed value is
1/X
, where
X
is the measurement value (if relative offset is being used, this is
the measured value with relative offset applied).
Math calculations are applied to the input signal after relative offset and before limit tests.
Example
smu.measure.func = smu.FUNC_DC_VOLTAGE
smu.measure.math.format = smu.MATH_RECIPROCAL
smu.measure.math.enable = smu.ON
Enables the reciprocal math operation on
voltage measurements.
Also see
Calculations that you can apply to measurements (on page 4-49)
smu.measure.math.enable (on page 14-134)
smu.measure.math.mxb.bfactor (on page 14-136)
smu.measure.math.mxb.mfactor (on page 14-137)
smu.measure.math.percent (on page 14-138)