Protection[:State]; Reference - Keysight N5171B EXG Manual

Basic Function Commands
Power Subsystem ([:SOURce]:POWer)

:PROTection[:STATe]

[:SOURce]:POWer:PROTection[:STATe] ON|OFF|1|0
[:SOURce]:POWer:PROTection[:STATe]?
This command enables or disables the power search protection function. The
power search protection function sets the attenuator to its maximum level
whenever a power search is initiated. This can be used to protect devices that
are sensitive to high average power or high power changes. The trade off on
using the power protection function is decreased attenuator life, as the
attenuator will switch to its maximum setting during a power search.
Continual or excessive use of the power search protection function can
decrease attenuator life.
Example
:POW:PROT ON
The preceding example enables the power inhibit function.

:REFerence

[:SOURce]:POWer:REFerence <value><unit>
[:SOURce]:POWer:REFerence?
This command sets the power level for the signal generator RF output
reference.
The RF output power is referenced to the value entered in this command.
Keysight EXG and MXG X-Series Signal Generators SCPI Command Reference
It is limited to CW operation.
This mode is mutually exclusive with Attenuator Hold,
and any modulation type. A settings conflict error will
be generated if Attenuator Hold or any modulation is
activated when Optimize S/N is enabled.
Supported All models
ON (1) Causes the attenuator to switch to and hold its
maximum level setting during a power search.
OFF (0) Sets the attenuator to normal mode. The attenuator is
not used during power search.
*RST 0
Key Entry RF During Power Search Normal Minimum
Supported All Models
*RST
+0.00000000E+000
Range –400 to 300 dBm
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