Keithley 2461 Reference Manual

Section
8: TSP command reference Model 2461 Interactive SourceMeter® Instrument
Reference Manual
8-160 2461-901-01 A/November 2015
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 3-82)
smu.measure.math.enable (on page 8-158)
smu.measure.math.mxb.bfactor (on page 8-160)
smu.measure.math.mxb.mfactor (on page 8-162)
smu.measure.math.percent (on page 8-163)
smu.measure.math.mxb.bfactor
This attribute specifies the offset, b, for the y = mx + b 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
0
Usage
value = smu.measure.math.mxb.bfactor
smu.measure.math.mxb.bfactor = value
value
The offset for the y = mx + b operation; the valid range is −1e12 to +1e12
Details
This attribute specifies the offset (b) for an mx + b operation.
The mx + b math operation lets you manipulate normal display readings (x) mathematically based on
the 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

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV