Configuring the Signal in the RF Domain
R&S
®
SMW200A
527User Manual 1175.6632.02 ─ 16
Settings
State............................................................................................................................527
Detector Sensitivity..................................................................................................... 527
Driver Amplifier............................................................................................................528
Sample Level.............................................................................................................. 528
State
Selects the internal level control mode.
Find further details about the individual settings in "ALC States and their effects"
on page 525. 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.
"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"
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 SMW. 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 SMW 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] on page 1095
Detector Sensitivity
Determines the path of the internal level detector.
The level detector of the ALC has multiple paths distinguished by their sensitivity.
Improving Level Performance
To Next Page
Loading...
