3: Functions and features Model 2450 Interactive SourceMeter® Instrument
3-8 2450-901-01 Rev. B/September 2013
Setting mx+b math operations
From the front panel:
1. Press FUNCTION and select the measurement function.
2. Press the MENU key.
3. Under Measure, select Filter/Math.
4. Next to Math State, select On.
5. Next to Math Function, select mx+b.
6. Next to m (Scalar), select the value for m.
7. Next to b (Offset), select the value for b.
Using SCPI commands:
To set the math operations to mx+b, send the commands:
:CALCulate:CURRent:MATH:FORMat MXB
:CALCulate:CURRent:MATH:MMF <m>
:CALCulate:CURRent:MATH:MBF <b>
:CALCulate:CURRent:MATH:STATE ON
where <m> is the m factor and <b> is the b factor.
To set the math operations for a different function, change CURRent to VOLTage for voltage
measurements or RESistance for resistance measurements.
Using TSP commands:
Set the measurement function, and then send the commands:
smu.measure.math.format = smu.MATH_MXB
smu.measure.math.mxb.mfactor = mvalue
smu.measure.math.mxb.bfactor = bvalue
smu.measure.math.enable = smu.ON
where mvalue is the m factor and bvalue is the b factor.
Setting reciprocal math operations
From the front panel:
1. Select the measurement function.
2. Press the MENU key.
3. Under Measure, select Filter/Math.
4. Next to Math State, select On.
5. Next to Math Function, select Reciprocal.
Using SCPI commands:
To set the math operations to reciprocal, send the command:
:CALCulate:VOLTage:MATH:FORMat RECiprocal
To set the percent math operation for another measurement function, replace VOLTage with
CURRent or RESistance.
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