6 53220A/53230A Math, Graphing, and Data Logging
210 Keysight 53220A/53230A User’s Guide
Scale reference value
The NULL, PCT, PPM, and PPB scaling functions require a reference value. For PCT,
PPM, and PPB the value cannot be ‘0’.The reference can be obtained automatically
or specified directly with the commands:
CALCulate[1]:SCALe:REFerence:AUTO {OFF|ON}
CALCulate[1]:SCALe:REFerence:AUTO? (query form)
CALCulate[1]:SCALe:REFerence {<reference>|MINimum|MAXimum| DEFault}
CALCulate[1]:SCALe:REFerence? [{MINimum|MAXimum|DEFault}]
(query form)
ON - automatically selects the first measurement as the reference for all
subsequent readings in the reading count (trigger count x sample count). OFF
disables automatic selection and requires the reference to be specified directly.
Following a reset (*RST) or instrument preset (SYSTem:PRESet), automatic
reference selection is enabled (ON).
<reference> - specifies the reference value directly. The reference is used for all
readings in the reading count.
Following a reset (*RST) or instrument preset (SYSTem:PRESet), a reference value
of 0.0 is set and automatic reference is enabled.
From the front panel, pressing Get New Reference takes a reference measurement
on the first trigger received after the key is pressed. A reference can be entered
manually by selecting Ref Value and using the knob or SHIFTed numeric keys.
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