Rohde & Schwarz R&S SMB100B - Attenuator Settings

Improving level performance
R&S
®
SMB100B
152User Manual 1178.3711.02 ─ 08
●
Uninterrupted level settings with constant VSWR
A fix attenuation value is required for obtaining uninterrupted level settings with
constant VSWR.
The configuration "RF Off Mode > Unchanged" ensures that constant VSWR is
maintained if you turn the signal off and on again.
●
Noise sensitive applications
The parameter "RF OFF Mode > Full Attenuation" sets maximum attenuation and
thus suppresses noise when you turn off the RF signal.
7.1.1 Attenuator settings
Access:
► Select "Level" > "Level > Attenuator".
In the "Attenuator" dialog, you can select the operating mode of the electronic step
attenuator.
The remote commands required to define these settings are described in Chap-
ter 12.13, "OUTPut subsystem", on page 393 and Chapter 12.15.10, "SOURce:POWer
subsystem", on page 491.
Settings
Mode........................................................................................................................... 152
Level Range................................................................................................................153
RF OFF Mode............................................................................................................. 153
Mode
Determines the operating mode of the step attenuator.
"Auto"
Adjusts the attenuator settings automatically.
"Fixed"
Fixes the attenuator and amplifier paths for the current RF level and
provides signal output with constant output VSWR. The resulting level
range is indicated under "Level Range" on page 153.
Remote command:
:OUTPut<hw>:AMODe on page 395
Attenuator