Agilent Technologies E6380-90073 Manuale Utente

Pagina di 352
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.