3
Programming
240
Keysight 53147A/148A/149A Operating and Programming Guide
[:SENSe]:ROSCillator Subtree
This subtree controls the Reference Oscillator.
COMMAND
[:SENSe]:ROSCillator:SOURce . . . <character_program_data>
Sets or queries the current reference timebase to
INTernal
or
EXTernal
.
QUERY
RESPONSE
A sequence of ASCII-encoded bytes:
INT
or
EXT
COMMENTS
– *RST: INT
– INTernal indicates the timebase is the internal reference. EXTernal indicates
the signal at the external reference input (located on the rear panel of the
instrument; Reference connector) is the reference timebase.
– The instrument does not switch to
EXTernal
unless a suitable 1, 2, 5, or 10
MHz signal is present on the Reference connector on the back panel.
– Execution of the command (that is, explicitly selecting internal or external
timebase) sets
[:SENS]:ROSC:SOUR:AUTO
to
OFF
.
– If this is set to
EXT
, and no valid external signal is available at the back-panel
Reference connector, the front-panel frequency display may show an error
message.
– If this is set to
INT
, the 10 MHz signal generated by the internal reference
oscillator is available as an output on the back-panel Reference connector.
RELATED
FRONT-PANEL
KEYS
Shift + Menu
(REF OSC > INT | EXT)
Содержание 53147A
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