Keysight E6640A, Measurement Applications User & Programmer Reference

Page: 217 / 2870

4 Input/Output Functions
Input/Output
(s) the reference input types (in SCPI commands, and in the Virtual Front Panel menus ) are blanked and
unavailable for use.
Key Path
Input/Output
Remote Command [:SENSe]:ROSCillator:SOURce:TYPE INTernal | EXTernal | SENSe | PULSe
[:SENSe]:ROSCillator:SOURce:TYPE?
Dependencies The PULSe parameter, and support of the 1 pps signal at the EXT REF IN input, are not available in
firmware prior to A.13.00. They are also not available in some model numbers. If not available, the
Pulse key will be blank, and sending the PULSe parameter via SCPI will generate an error:
Preset This is unaffected by a Preset but is set to SENSe on a "Restore Input/Output Defaults" or "Restore
System Defaults->All".
State Saved Saved in instrument state.
Status Bits/OPC
dependencies STATus:QUEStionable:FREQuency bit 1 set if unlocked.
Note: The status bit is not set for non-controlling instances. To determine if the frequency reference
is unlocked, the controlling instance must be queried.
Backwards Compatibility
Notes Freq Ref In was not saved in state in the legacy instruments. It is a part of state in the X-Series.
Initial S/W Revision Prior to A.02.00
Modified at S/W Revision A.14.00
Remote Command [:SENSe]:ROSCillator:SOURce?
Notes 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”
Note: The SCPI query always returns “INTernal” for non-controlling instances.
Preset SENSe
Backwards Compatibility
Notes 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.
Initial S/W Revision Prior to A.02.00
Remote Command [:SENSe]:ROSCillator:SOURce INTernal|EXTernal
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