HP E1340A User Manual page 172

[SOURce:]ROSCillator:SOURce
Example
172 HP E1340A Command Reference
Executable when initiated: Query form only
Coupled command: Yes
*RST Condition:
Setting the reference oscillator source
ROSC:SOUR EXTernal
SOURce:ROSCillator:SOURce INTernal
Select an external oscillator source
Chapter 7