The signal generator provides a decouple function that allows decoupling of the step attenuator (if equipped) from the ALC system and a user level (flatness correction) calibration function that provides compensation for path-variations-with-frequency in a test setup. This menu provides a means to decouple the step attenuator from the ALC and set the attenuation in 10 dB steps.

Toggle the Auto Attenuation button to the off position as shown in Figure: Attenuator Menu. This allows the attenuator to become decoupled.

Press: LEVEL | ATTENUATOR | Auto Attenuation

With AUTO ATTENUATION toggled on,

Press: ATTENUATION to display the decouple dialog of 10 dB steps to decouple the step attenuator in:
(10. 20, 30, 40, 50, 60, 70, 80, 90, or 100 dB) as shown in Figure: Attenuation Ranges. Press the attenuation step to engage.

Press: LEVEL | ATTENUATOR | Auto Attenuation

Press ZERO to couple the step attenuator to 0 dBm. When in a decoupled mode. pressing ZERO will set the step attenuator to 0 dBm. In this state, the signal generator can scroll linearly through the full range of available power.