52 Agilent N5181A/82A MXG Signal Generators SCPI Command Reference
Basic Function Commands
Power Subsystem ([:SOURce]:POWer)
:ALC:SEARch:SPAN[:STATe]
Supported All Models
[:SOURce]:POWer:ALC:SEARch:SPAN[:STATe] ON|OFF|1|0
[:SOURce]:POWer:ALC:SEARch:SPAN[:STATe]?
This command enables (1) or disables (0) the span mode, allowing you to perform power searches
over a selected range of frequencies. The power search corrections are then stored and used
whenever the signal generator is tuned within the selected range.
:ALC[:STATe]
Supported All Models
[:SOURce]:POWer:ALC[:STATe] ON|OFF|1|0
[:SOURce]:POWer:ALC[:STATe]?
This command enables or disables the automatic leveling control (ALC) circuit.
*RST 1
Key Entry ALC Off On
Remarks The purpose of the ALC circuit is to hold output power at a desired level by
adjusting the signal generator’s power circuits to compensate for power drift.
Power drift occurs over time and changes in temperature. Refer to the
N5181A/82A Agilent MXG Signal Generators User’s Guide for more information on
the ALC.
:ATTenuation
Supported All Models
[:SOURce]:POWer:ATTenuation <value><unit>
[:SOURce]:POWer:ATTenuation?
This command sets the signal generator’s attenuator level. Before setting the attenuator level, set the
“:ATTenuation:AUTO” function to Off which will disable ALC control.
In normal operation the attenuator level is selected by the signal generator’s automatic loop control
(ALC) which maintains the output power by adjusting internal circuits to compensate for any power
fluctuations due to drift, band changes, or load variations. In some applications, such as fast pulse
modulation, the ALC may not respond quickly enough to compensate for the pulse rise times. In this
case you can set the attenuator and override any ALC adjustments.
The output power is the ALC level minus the attenuator setting. The attenuator is set in increments
of 5 dB.
Example
:POW:ATT 10DB
The preceding example sets the attenuator to 10 dB.
*RST +115
Range 0 to 115 dB
To Next Page
Loading...
