Alc - R&S SGT100A User Manual

®
R&S SGT100A
7.7.6.4

ALC

► To access the automatic level control (ALC) settings, select "SGMA-GUI > Instru-
ment Name > Level > ALC".
Automatic level control can be used with almost all applications, especially I/Q
modulation. It only has to be deactivated for certain settings in the baseband and
when I/Q impairments ("Impairments State On") are activated. This is indicated
under the respective function.
By default, the instrument operates in "Table & On" mode to provide the highest
level accuracy and fastest setting time. Level control can be switched to "Off
(Table)" or "On" for particular applications. The "Off (Table)" state (level control Off)
is recommended if in CW mode the signal/intermodulation ratio is to be improved
for multi-transmitter measurements.
State
Sets the internal level control.
"Table & On"
"On"
"Off (Table)"
Remote command:
[:SOURce]:POWer:ALC[:STATe]
Detector Sensitivity
Allows you to fix the internal level detector. It is recommended to use the Auto mode
(default).
"Auto"
"Low"
"Med"
User Manual 1176.8674.02 ─ 07
Default mode.
First sets the level to the target value using the internal level table.
Then activates the level control circuit to achieve maximum level
accuracy.
Internal level control is permanently activated.
If "On" and "Attenuator Mode Fixed" is selected, the level is recalibra-
ted for every level and frequency setting.
Internal level control is performed according to the ALC table.
on page 466
Automatic detector selection. Recommended mode of operation.
Low sensitivity detector selected.
This setting is intended for signals with high internal electronic levels.
Medium sensitivity detector selected.
This setting corresponds to normal mode. It is intended for signals
with medium internal electronic levels.
Signal Generator Settings
RF Settings
211