Keysight x-series User Reference Manual page 196

4 Input/Output Functions
Input/Output
Preset
State Saved
Status Bits/OPC
dependencies
Backwards Compatibility
Notes
Initial S/W Revision
Modified at S/W Revision
Remote Command
Notes
Preset
Backwards Compatibility
Notes
Initial S/W Revision
Remote Command
Notes
Initial S/W Revision
196
Pulse key will be blank, and sending the PULSe parameter via SCPI will generate an error:
This is unaffected by a Preset but is set to SENSe on a "Restore Input/Output Defaults" or "Restore
System Defaults->All".
Saved in instrument state.
STATus:QUEStionable:FREQuency bit 1 set if unlocked.
Freq Ref In was not saved in state in the legacy instruments. It is a part of state in the X-Series.
Prior to A.02.00
A.14.00
[:SENSe]:ROSCillator:SOURce?
The query [SENSe]:ROSCillator:SOURce? returns the current switch setting. This means:
1. If it was set to SENSe but there is no external reference nor 1pps signal so the instrument is
actually using the internal reference, then this query returns INTernal and not SENSe.
2. If it was set to SENSe and there is an external reference present, the query returns EXTernal and
not SENSe.
3. If it was set to SENSe and there is a 1 pps signal present, the query returns PULSe and not SENSe.
4. If it was set to EXTernal, then the query returns "EXTernal"
5. If it was set to INTernal, then the query returns "INTernal".
6. If it was set to PULSe, then the query returns "PULSe"
SENSe
The query [:SENSe]:ROSCillator:SOURce? was a query-only command in ESA which always returned
whichever reference the instrument was using. The instrument automatically switched to the ext ref
if it was present.
In PSA (which had no sensing) the command [:SENSe]:ROSCillator:SOURce set the reference (INT or
EXT), so again its query returned the actual routing.
Thus the query form of this command is 100% backwards compatible with both instruments.
Prior to A.02.00
[:SENSe]:ROSCillator:SOURce INTernal|EXTernal
For PSA compatibility the command form is provided and is directly mapped to
[:SENSe]:ROSCillator:SOURce:TYPE
Prior to A.02.00
EMI Receiver Mode Reference