To open the "Automatic Level Control" dialog, select "RF" > "Configure" > "Automatic Level Control" or use the MENU key under "RF".
The combined dialog "ALC / UCOR" is divided into the several sections and provides access to the "Automatic Level Control" settings and to function "User Correction", see "User Correction").
Activates/deactivates internal level control.
Note: ALC is active in almost all applications by default. However, the Pulse Modulation mode excludes ALC, as the control loop would detect incorrect values and result in level deviations.
Also note that ALC may detect incorrect values in multi-transmitter test setups. If multiple generators are coupled, reverse power may affect the ALC readings. Based on incorrect values, ALC would have an impact on the signal to intermodulation ratio.
"Auto" | The instrument selects the most appropriate ALC mode automatically. ALC is on in most operating conditions. Default state. |
"On" | Activates ALC, regardless of the operating conditions. |
"Off (Sample & Hold)" | Deactivates internal level control. Sample & hold closes the level control loop at every frequency and level change for a short period of time. The level control voltage is sampled and then clamped. |
Forces the generator to execute level adjustment once, although the "Sample & Hold" mode is active.
Remote command:
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