Configuring the RF Signal
R&S
®
SMW200A
564User Manual 1175.6632.02 ─ 30
In this operating mode, the generator adjusts the output level whenever the fre-
quency or level setting changes.
●
Noise sensitive applications
The parameter "RF OFF Mode > Full Attenuation" sets maximum attenuation and
thus suppresses noise when you turn off the RF signal.
Interactions and characteristics
●
The spectral purity of the RF output signal decreases with high attenuation.
●
Fixed mode is effective when automatic level control is activated (ALC State = On).
●
The setting of the RF OFF Mode > Full Attenuation has priority over the RF level
Mode > Fixed or Manual, regardless of the selected settings characteristics.
8.9.1.1 Attenuator Settings
Access:
► Select "RF" > "RF Level" > "Level > Attenuator".
In the "Attenuator" dialog, you can select the operating mode of the step attenuator,
the instrument is equipped with.
The remote commands required to define these settings are described in Chap-
ter 14.16, "OUTPut Subsystem", on page 885 and Chapter 14.19.16,
"SOURce:POWer Subsystem", on page 1188.
Settings
Mode........................................................................................................................... 564
Attenuation..................................................................................................................565
Level Range................................................................................................................565
RF OFF Mode............................................................................................................. 565
Mode
Determines the operating mode of the step attenuator.
Note: RF OFF Mode > Full Attenuation has higher priority than "Fixed" or "Manual".
"Auto"
Adjusts the attenuator settings automatically.
Improving Level Performance
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