Configuring the RF Signal
R&S
®
SMBV100B
380
User Manual 1178.4460.02 ─ 03
Find further details about the individual settings in
"ALC States and their effects"
on page 378. It covers an overview of the functionality and indicates what is to be con-
sidered.
"Auto"
Selects the most appropriate ALC mode automatically.
"On"
Activates ALC permanently.
"Sample & On"
Starts the internal level control with the first change.
The ALC modes "Off (Sample & Hold)" and "Sample & On" use a
short sample pulse to set the level control. The level of this sample
pulse corresponds to the sample level setting of the full PEP of the
R&S
SMBV100B. It does not consider any signal headroom, e.g.
applied to a user defined ARB waveform.
Notice:
Risk of DUT damage due to high input power
The settings combination "ALC > Sample Level > Full" and "ALC >
State > Off (Sample &Hold)" or "ALC > State > Sample & On" results
in signals with large headroom. With this settings combination, the
R&S
SMBV100B generates a short sample pulse with full RF output
power.
To protect the DUT from damage due to high input power, use the
setting "Sample Level > Attenuated" or "Sample Level > Minimum".
"Off (Table)"
Controls the level using the attenuation values of the internal ALC
table.
"Table & On"
Starts with the attenuation setting from the table and continues with
automatic level control.
Remote command:
[:SOURce<hw>]:POWer:ALC[:STATe]
Detector Sensitivity
Determines the path of the internal level detector.
The level detector of the ALC has multiple paths distinguished by their sensitivity.
"Auto"
Selects the detector path automatically, according to the given level.
This mode is the recommended operation mode.
"Low"
Selects the detector path with low sensitivity.
This setting is intended for signals with high internal electronic levels.
"Med"
Selects the path with medium sensitivity.
This setting corresponds to normal mode. It is intended for signals
with medium internal electronic levels.
"High"
Selects the detector path with high sensitivity, intended for signals
with low internal electronic levels.
"Fix"
Fixes the last set sensitivity setting.
Remote command:
[:SOURce<hw>]:POWer:ALC:DSENsitivity
Improving Level Performance
