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4-8 Relative, mX+b, and Percent (%)

SCPI programming - mX+b and percent

Setting mX+b units

The <name> parameter for CALCulate:KMATh:MUNits can be one or two characters

enclosed in single or double quotes. A character can be any letter of the alphabet, the degrees

symbol (°) or the ohms symbol (Ω).

The ohms symbol (Ω) and the degrees symbol (°) are not ASCII characters and therefore,

must be substituted with the ‘[’ and ‘\’ characters as follows:

CALCulate:KMAth:MUNits ‘[’ Use ohms symbol (Ω) as units designator.

CALCulate:KMAth:MUNits ‘\’ Use degrees symbol (°) as units designator.

Programming examples - mX+b and percent

Program Example 1 — This program fragment shows how to conﬁgure and enable the

mX+b calculation.

CALL SEND(7,“:calc:form mxb”,status%) ‘Selects mX+b calculation.

CALL SEND(7,“:calc:kmat:mmf 2”,status%) ‘Sets scale factor (M) to 2.

CALL SEND(7,“:calc:kmat:mbf 0.5”,status%) ‘Sets offset (B) to 0.5.

CALL SEND(7,“:calc:kmat:mun cd”,status%) ‘Sets units to “CD”.

CALL SEND(7,“:calc:stat on”,status%) ‘Enables calculation.

Program Example 2 — This program fragment shows how to conﬁgure and enable the

Percent calculation.

CALL SEND(7,“:calc:form perc”,status%) ‘Selects percent calculation.

CALL SEND(7,“:calc:kmat:perc:acq”,status%) ‘Uses input signal as

‘reference.

CALL SEND(7,“:calc:stat on”,status%) ‘Enables calculation.

Table 4-2

SCPI commands - mX+b and percent

Commands Description Default

:CALCulate

:FORMat <name> Select calculation; NONE, MXB or PERCent. NONE

:KMATh Path to conﬁgure mX+b and Percent:

:MMFactor <NRf> Specify scale factor (M) for mX+b: –100e6 to 100e6. 1

:MBFactor <NRf> Specify offset (B) for mX+b: -100e6 to 100e6. 0

:MUNits <name> Specify units for mX+b: see “Setting mX+b units.” MX

:PERCent <NRf> Specify reference value for Percent: –100e6 to 100e6. 1

:ACQuire Use input signal as reference value.

:STATe <b> Enable or disable the selected calculation. OFF

:DATA

[:LATest]? Query last calculation result.

:FRESh? Trigger a reading and query the calculation result.

Keithley 2182 User Manual

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