Keysight 81150A - Page 466

Appendix
466
Reference Clock Commands
Command
:ROSC:SOUR[?]
Long
[:SOURce]:ROSCillator:SOURce[?]
Parameters
{INTernal|EXTernal}
Parameter Suffix

Description
Select internal or external reference clock. When set to INTernal, the
instrument will use it’s built-in 10MHz reference. When set to EXTernal,
it will use the signal provided at the 10MHz Ref-In connector. The selection
will be overridden by the automatic reference clock detection if this is
enabled. When :ROSC:SOUR:AUTO is set to ON, then the query will
report the currently used reference clock source.
Example
:ROSC:SOUR EXT