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162 Chapter 1
GPIB Command Dictionary
CONFigure subsystem
:REFerence:INPut:SELect <string>
:REFerence:INPut:SELect?
These commands set/query the reference input selection. ‘Internal’ and
‘External’ define an internal or external reference. ‘Auto’ will switch
between external and internal inputs, based on the signal’s presence.
However, you must still set the frequency of the external reference
input (CONF:REF:INP:EXT) even though this is set to ‘Auto’. It does
not automatically select the frequency.
Syntax
CONF:REF:INP:SEL ‘Auto’
‘Internal’
‘External’
CONF:REF:INP:SEL?
Screen/field equivalent
CONF:REF:INP:SEL controls the Ref Select field of the
INSTRUMENT CONFIGURE screen.