Instrument Function
R&S
®
SMBV100A
180Operating Manual 1407.6062.32 ─ 08
The level control status is permanently displayed as a status message in the info line.
5.4.9.1 Automatic Level Control Settings
To open the "Automatic Level Control" dialog, select "RF/A Mod" > "Configure" > "Auto-
matic Level Control" or use the MENU key under "RF/A Mod".
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
chapter 5.4.10, "User Correction", on page 181).
The top sections of the dialog provide access to the level and attenuator settings (see
chapter 5.4.8.3, "Power-On/EMF Settings", on page 178 and chapter 5.4.8.2, "RF Level
Dialog", on page 174).
State - ALC
Activates/deactivates internal level control.
"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.
If "Attenuator Mode Fixed" is selected in addition, the instrument adjusts
the level of every level and frequency setting.
"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.
"Off (Sample &
Hold High
Accuracy)"
Deactivates internal level control.
Works like Sample & Hold, but provides improved level accuracy, by
increasing the frequency and level setting time up to 20 ms.
RF Signal and Analog Modulations - RF Block
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