SENSe:ROSCillator:SOURce:AUTO
Syntax
[SENSe:]ROSCillator:SOURce:AUTO {OFF | ON}
[SENSe:]ROSCillator:SOURce:AUTO?
Description
This command enables or disables automatically selecting which reference oscillator will be used:
l OFF disables automatic selection, and the source is controlled by the SENSe:ROSCillator:SOURce com-
mand.
l ON enables automatic selection. The instrument will select the external reference oscillator if a valid 1,
5, or 10 MHzsignal, as specified by SENSe:ROSCillator:EXTernal:FREQuency, is present on the the Ext
Ref In BNC. Otherwise, the internal reference oscillator will be used.
Remarks
l CONFigure and MEASure? do not affect the automatic selection of the reference oscillator source.
l When SENSe:ROSCillator:SOURce:AUTO ON is set, you can use the SENSe:ROSCillator:SOURce? com-
mand to determine whether the internal or an external reference oscillator is being used.
l Selecting the reference oscillator source (SENSe:ROSCillator:SOURce) will disable automatic selection
of the reference oscillator.
l The enable/disable state of the automatic selection of the reference oscillator source is stored in non-
volatile memory, and is unchanged after a Factory Reset (*RST command) or an Instrument Preset
(SYSTem:PRESet command).
l Automatic selection of the reference oscillator source is enabled when the instrument is shipped from
the factory or after a SYSTem:SECurity:IMMediate command.
Return Format
The query returns the current automatic selection state: 0 (OFF) or 1 (ON).
Examples
The following example makes a frequency measurement using the external reference oscillator, if a valid
signal is present on the Ext Ref In BNC; otherwise, the internal reference oscillator is used..
ROSC:SOUR:AUTO ON
MEAS:FREQ? 1.0E6
Typical Response: +1.21513398300000E+006
SENSe:ROSCillator:SOURce:AUTO
366 Keysight 53220A/53230A Programmer's Reference
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