Configuring the RF signal
R&S
®
SMM100A
392
User Manual 1179.1341.02 ─ 05
State
Selects the internal level control mode.
"Auto"
Selects the most appropriate ALC mode automatically.
"On"
Activates ALC permanently.
"Off (Sample & Hold)"
Deactivates the ALC, but allows you to recalibrate the level at each
frequency and level change. The value remains up to the next
change.
"Sample & On"
Enables automatic level control after a short sample pulse.
"Off (Table)"
Controls the level using the attenuation values of the internal ALC
table.
"Table & On"
Starts with the attenuation setting from the internal ALC table and
continues with automatic level control.
For further details on the individual settings, an overview of the functionality and details
on what is to be considered, see
"ALC states and their effects"
Note:
The ALC modes "Off (Sample & Hold)" and "Sample & On" use a short sample pulse to
set the level control. To adjust the level of this sample pulse, see
on page 393 in the ALC dialog. It does not consider any signal headroom, e.g. applied
to a user defined ARB waveform.
How to: See
Chapter 7.12.2.2, "How to enable the ALC"
Remote command:
[:SOURce<hw>]:POWer:ALC[:STATe]
Mode
In
SMM100A indicates the currently active ALC mode
that is set automatically.
Remote command:
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.
Improving level performance
