Instrument Function
R&S
®
SMBV100A
227Operating Manual 1176.8016.02 ─ 17
The following section explains the functionality of "Sample & Hold", to provide an over-
view and to indicate what is to be considered. "On" and "Auto" require no additional
explanation. Furthermore, find the ALC state settings described in detail in State -
ALC .
ALC OFF (Sample & Hold)
In "S&H" mode, the signal generator switches for a short period of time into CW mode
and activates ALC. ALC adjusts the level to the set value and the generator holds the
value (freeze). Then, the generator switches ALC off again and back to the operating
mode.
RF output behavior during Sample & Hold depends on the configuration of your instru-
ment. Instruments equipped with...:
●
an electronic step attenuator
The level is decreased by 30 dB.
●
a mechanical step attenuator
The level control status is permanently displayed as a status message in the info line.
5.5.7.1 Automatic Level Control Settings
To open the "Automatic Level Control" dialog, select "RF/A Mod" > "Configure" >
"Automatic 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 5.5.9, "User Correction", on page 232).
The top sections of the dialog provide access to the level and attenuator settings (see
Chapter 5.5.6.3, "Power-On/EMF Settings", on page 225 and Chapter 5.5.6.2, "RF
Level Dialog", on page 221).
State - ALC
Activates/deactivates internal level control.
"Auto"
The instrument selects the most appropriate ALC mode automati-
cally.
ALC is on in most operating conditions. Default state.
"On"
Activates ALC, regardless of the operating conditions.
RF Block
To Next Page
Loading...
