R&S ESU Series Operating Manual page 646

R&S ESU
6.16.12 SENSe:ROSCillator Subsystem
This subsystem controls the reference oscillator. The numeric suffix in SENSe is irrelevant for the com-
mands of this subsystem.
[SENSe<1|2>:]ROSCillator:SOURce INTernal | EXTernal | EAUTo
This command controls selection of the reference oscillator.
INTernal
EXTernal
EAUTo
If the external reference oscillator is selected, the reference signal must be connected to the rear panel
of the instrument.
As of firmware version 4.4x, you can you also select EAUTo. This paramater selects an external
reference signal, but switches to the internal reference signal if no external reference is detected. If the
external reference oscillator is selected (EXT | EAUT), the reference signal must be connected to the
rear panel of the instrument.
The reference settings are not changed after a preset.
Example:
"ROSC:SOUR EXT"
Characteristics: *RST value: –
SCPI: conform
Mode: R, A
*RST is not influencing this parameter.
[SENSe<1|2>:]ROSCillator:SOURce:EAUTo?
This command queries the current source of the reference signal, if the external reference source EXT
(INT) is used. The command returns INT if the internal reference source is used and EXT for an
external reference source.
This command is a query and therefore has no *RST value.
Example:
"ROSC:SOUR:EAUT?"
Characteristics: *RST value: -
SCPI: device-specific
Mode: R, A
Operating Manual 1302.6163.12 - 03
Uses the internal reference signal.
Uses the external reference signal.
Uses the external reference signal, but automatically switches to the internal
reference signal, if no external reference signal is detected. Note that you have
to change the reference source back to EXT and EAUT once the connection to
the external reference is reestablished.
You can query the current status with
EAUTo?
Remote Control – Description of Commands
[SENSe<1|2>:]ROSCillator:SOURce:
SENSe Subsystem
6.207