Agilent X-Series Signal Generators SCPI Command Reference 67
Basic Function Commands
Power Subsystem ([:SOURce]:POWer)
The ALC is used to maintain the signal generator’s output power level by compensating for power
fluctuations due to drift, band changes, or load variations. After you set the ALC level, the signal
generator’s output power is monitored and corrected so that the power level setting is maintained.
Example
:POW:ALC:LEV 10DB
The preceding example sets the ALC to 10 dB.
*RST 1.00000000E000
Range –20 to 20
Key Entry Set ALC Level
:ALC:SEARch
Supported All Models
[:SOURce]:POWer:ALC:SEARch ON|OFF|1|0|ONCE
[:SOURce]:POWer:ALC:SEARch?
This command executes a power search routine that temporarily activates the ALC, calibrates the
power of the current RF output, and then disconnects the ALC circuitry. The power search mode is
active only when the ALC state is Off, and the RF output is On.
ON (1) This choice sets the power search mode to automatic (Auto). In automatic mode,
the power search calibration routine is executed whenever an instrument setting is
modified that affects RF output power. This includes changes to frequency,
amplitude and modulation.
OFF (0) This choice sets the power search mode to Manual and disables the
automatic power search calibration routine. The power level must be calibrated by
explicitly sending the ONCE command. If there is a change in frequency or
amplitude the ONCE command must be sent again.
ONCE This choice executes a single power search calibration at the current RF output
frequency and amplitude setting. This command can be used when the power
search mode is in automatic or manual.
*RST 1
Remarks If power search fails, the output power of the instrument will be set to minimum
and must be recovered with an instrument preset.
Refer to the :ALC[:STATe] command for setting the ALC state.
:ALC:SEARch:REFerence
Supported All Models
[:SOURce]:POWer:ALC:SEARch:REFerence RMS|FIXed|MANual|MODulated
[:SOURce]:POWer:ALC:SEARch:REFerence?
Key Entry AMPTD ALC Off Power Search
Auto Manual Do Power Search
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