Tektronix Keithley SourceMeter 2470, Reference Manual

Page: 777 / 995

2470 High Voltage SourceMeter Instrument Reference Manual Section 14: TSP command reference
2470-901-01 Rev. A /
May
2019 14-137
smu.measure.math.mxb.mfactor
This attribute specifies the scale factor, m, for the y = mx + b math operation.
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 1
Usage
valu e = smu.measure.math.mxb.mfactor
smu.measure.math.mxb.mfactor = value
value
The scale factor; the valid range is
−
1e12 to
+
1e12
Details
This command sets the scale factor (m) for an mx + b operation for the selected measurement
function.
The mx + b math operation lets you manipulate normal display readings (x) mathematically according
to the following calculation:
y = mx + b
Where:
•
y is the displayed result
•
m is a user-defined constant for the scale factor
•
x is the measurement reading (if you are using a relative offset, this is the measurement with
relative offset applied)
•
b is the user-defined constant for the offset factor
Example
smu.measure.func = smu.FUNC_DC_VOLTAGE
smu.measure.math.format = smu.MATH_MXB
smu.measure.math.mxb.mfactor = 0.80
smu.measure.math.mxb.bfactor = 50
smu.measure.math.enable = smu.ON
Set the measurement function to voltage.
Set the math operation to mx+b.
Set the scale factor for the mx+b operation
to 0.80.
Set the offset factor to 50.
Enable the math function.
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)