Keithley 2461, Reference Manual, Page: 795 / 1109

Section 8: TSP command reference Model 2461 Interactive SourceMeter® Instrument Reference Manual
8-122 2461-901-01 A/November 2015
smu.digitize.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
Configuration script
Measure configuration list
1
Usage
scaleFactor = smu.digitize.math.mxb.mfactor
smu.digitize.math.mxb.mfactor = scaleFactor
scaleFactor
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.digitize.func = smu.FUNC_DIGITIZE_CURRENT
smu.digitize.math.format = smu.MATH_MXB
smu.digitize.math.mxb.mfactor = 0.80
smu.digitize.math.mxb.bfactor = 50
smu.digitize.math.enable = smu.ON
Set the measurement function to digitize
current.
Set math format 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 3-82)
smu.digitize.math.enable (on page 8-119)
smu.digitize.math.format (on page 8-120)
smu.digitize.math.mxb.bfactor (on page 8-121)