HP 8360 User Handbook Manual page 377

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Function Group
Menu Map
Description
HP 8360
User's Handbook
SYSTEM
8
This softkey sets the synthesizer to choose its frequency standard
automatically. If an external standard is connected to the 10 MHz
REF INPUT BNC, then it is chosen as the reference. If no external
standard is connected, the internal standard is chosen as the
reference. If the internal standard has been disconnected also, the
synthesizer operates in a free run state. An asterisk next to the key
label indicates that this feature is active.
SCPI: ROSCillator[:SOURce]:AUTO ON]OFF]l]O
Analyzer: NONE
Ref Osc Menu
SYSTEM
8
This softkey tells the synthesizer to accept an external 10 MHz signal
as the frequency reference. The external signal must be applied to
the 10 MHz REF INPUT BNC connector located on the rear panel.
If no external signal is applied,
the message line of the display. An asterisk next to the key label
indicates that this feature is active.
UNLOCK and EXT REF
Operating and Programming Reference T-l
appears on