4. ALC

ALC

Choice: Off | On

Default: On

Double-click or use the drop-down menu to enable or disable the automatic level control.

On – The ALC circuit constantly monitors and controls the output power level.

Off – No automatic leveling occurs.

ALC Bandwidth

Choice: Auto | 100.00 Hz | 1.00 kHz | 10.00 kHz | 100.00 kHz

Default: Auto

Double-click or use the drop-down menu to select an ALC bandwidth.

This parameter is not available for all instrument model numbers and may be grayed out.

Power Search Reference

Choice: Fixed | Modulation

Default: Modulation

Double-click or use the drop-down menu to select a fixed or modulated reference signal when doing a power search.

Fixed – Power search uses a fixed 0.5 V reference.

Modulated – Power search uses the RMS value of the current I/Q modulation as the reference.

Set ALC to Off to enable this parameter.

RF During Power Search

Choice: Normal | Minimum

Default: Normal

Double-click or use the drop-down menu to select the level of the output power control during a power search routine.

Normal – Performs power searches without setting the internal step attenuator to its maximum setting. Glitches and power changes may be present during the search.

Minimum – Sets the signal generator's step attenuator to its maximum setting during power search to protect sensitive circuits.

Set ALC to Off to enable this parameter.