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66 Agilent X-Series Signal Generators SCPI Command Reference

Basic Function Commands

Power Subsystem ([:SOURce]:POWer)

:ALC:BANDwidth

Supported All Models

[:SOURce]:POWer:ALC:BANDwidth|BWIDth <num>freq suffix]

[:SOURce]:POWer:ALC:BANDwidth|BWIDth?

This command overrides the signal generator's automatic ALC bandwidth selection with the users

specific selection. For waveforms with varying amplitudes, high crest factors, or both, the

recommended ALC loop bandwidth is the low bandwidth setting of the generator. Limiting the loop

bandwidth of the ALC circuit will prevent the ALC from sampling the fast rising edges of pulsed

waveforms. A limited, or narrow bandwidth will result in a longer ALC sample time and a more

accurate representation of the signal's level.

*RST 200 (2kHz when ALC:BAND:BWID is set to AUTO)

Remarks Use this command when the ALC state is set to On. This command will override

the automatic ALC bandwidth selection set by the :ALC:BANDwidth|BWIDth:AUTO

command.

:ALC:BANDwidth|BWIDth:AUTO

Supported All Models

[:SOURce]:POWer:ALC:BANDwidth|BWIDth:AUTO ON|OFF|1|0

[:SOURce]:POWer:ALC:BANDwidth|BWIDth:AUTO?

This command turns the bandwidth (BW) auto state on or off.

The bandwidth auto function allows the signal generator to automatically select a bandwidth for the

automatic leveling control (ALC) circuit.

ON (1) This choice allows the signal generator to automatically select an ALC BW. The

selection of the ALC BW depends on the signal generator modulation type.

OFF (0) This choice disables automatic selection of the ALC BW.

*RST 1

Key Entry Auto

Remarks For more information on ALC bandwidth, refer to the User’s Guide.

:ALC:LEVel

Supported All Models

[:SOURce]:POWer:ALC:LEVel <value><unit>

[:SOURce]:POWer:ALC:LEVel?

This command sets the automatic leveling control (ALC) level. Use this command after setting the

attenuation auto mode to On. Refer to :ATTenuation:AUTO command for setting the attenuation auto

mode.

Key Entry Auto 200 Hz 2 kHz 20 kHz

Agilent Technologies N5171B User Manual

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