6: SCPI command reference Model 2450 Interactive SourceMeter® Instrument
6-8 2450-901-01 Rev. B/September 2013
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: Specify a constant that is applied to the measurement and display measurements as
percentages.
• 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.
If you send this command without the <function> parameter, it will set the state of the math format
for all functions.
Example
:CALC:VOLT:MATH:MMF 0.80
:CALC:VOLT:MATH:MBF 50
:CALC:VOLT:MATH:STATE ON
Set the math function for voltage measurements to
mx+b.
Set the scale factor for voltage measurements to 0.80.
Set the offset factor to 50.
Enable the math function.
Also see
Calculations that you can apply to measurements (on page 3-6)
:CALCulate[1]:<function>:MATH:MBFactor (on page 6-8)
:CALCulate[1]:<function>:MATH:MMFactor (on page 6-10)
:CALCulate[1]:<function>:MATH:PERCent (on page 6-11)
:CALCulate[1]:<function>:MATH:STATe (on page 6-12)
:CALCulate[1]:<function>:MATH:MBFactor
This command specifies the offset for the y = mx + b operation.
Type Affected by Where saved Default value
Instrument reset
Power cycle
Measure configuration list
Measure configuration list
Usage
:CALCulate[1]:<function>:MATH:MBFactor <n>
:CALCulate[1]:<function>:MATH:MBFactor?
The function to which this setting applies:
• Current: CURRent[:DC]
• Resistance: RESistance
• Voltage:
The offset for the y = mx + b operation; the valid range is −1e12 to +1e12
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