R&S SMB100A Operating Manual page 168

®
R&S SMB100A
The signal generator outputs the set level for 3 to 5 ms after level or frequency set-
ting during a Sample & hold measurement.
Instruments equipped with one of the options R&S SMB-B112L, R&S SMB-B120L
or R&S SMB-B140L come without step attenuator.
The level control status is permanently displayed as a status message in the info line.
Automatic Level Control Settings
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
Chapter 5.3.5.6, "User
State - ALC
Activates/deactivates internal level control.
"Auto"
"On"
"Off (Sample & Hold)"
Remote command:
[:SOURce<hw>]:POWer:ALC[:STATe]
RF During Power Search - ALC
Activates the mode for the mechanical step attenuator and for output during ALC
power search.
"Normal"
"Minimum"
Remote command:
:OUTPut<hw>:ALC:SEARch:MODE
Search Once - ALC
Forces the generator to execute level adjustment once, although the "Sample & Hold"
mode is active.
Operating Manual 1407.0806.32 ─ 21
Correction", on page 158).
The instrument selects the most appropriate ALC mode automati-
cally.
ALC is on in most operating conditions. Default state.
Activates ALC, regardless of the operating conditions.
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.
The RF output is active during power search.
The RF output is inactive during power search.
on page 312
Instrument Function
on page 377
RF Block
153