Keysight Technologies E4981A, Programming Manual

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48 Chapter 3
Setting Up Measurement Conditions and Display
Setting Up Display
Displaying measurement result as deviation from reference value
(deviation measurement mode)
You can use the deviation measurement mode to display a relative measurement result as
deviation from the reference value instead of displaying its absolute value. To turn
ON/OFF the deviation measurement mode, use the following commands.
• :CALCulate1:MATH:STATe on page 190
• :CALCulate2:MATH:STATe on page 193
You can select from two modes in the deviation measurement mode: displaying the
deviation as it is or displaying the deviation as a percentage relative to the reference value.
To set the deviation measurement mode, use the following commands.
• :CALCulate1:MATH:EXPRession:NAME on page 189
• :CALCulate2:MATH:EXPRession:NAME on page 192
To set the reference value in the deviation measurement mode, use the following
command.
• :DATA[:DATA] on page 206
The table below shows the relationship between the setups using the above commands and
the values displayed as the measurement result.
Where, and are:
: Measured value
: Reference value (set using the
:DATA[:DATA]
command)
NOTE
The measured value read out by the SCPI command is a calculation result based on the
above setup. For judgment in the comparator function, the measurement result is used as is
regardless of the setup. (Refer to the data processing flow in the
Operation Manual
.)
Setup of
:CALCulate1:MATH:STATe or
:CALCulate2:MATH:STATe
Setup of
:CALCulate1:MATH:EXPRessi
on:NAME or
:CALCulate2:MATH:EXPRessi
on:NAME
Value displayed as the
measurement result
OFF ———
ON
DEV
PCNT
Meas
Meas Ref
–
Meas Ref
–
Ref
---------------------------- 100
×
Meas Ref
Meas
Ref