Configuring the Signal in the RF Domain
R&S
®
SMW200A
523User Manual 1175.6632.02 ─ 16
Settings
Mode .......................................................................................................................... 523
Attenuation .................................................................................................................523
Attenuator Level Range ............................................................................................. 523
RF OFF Mode ............................................................................................................ 523
Mode
Determines the operating mode of the attenuator at the RF output.
Note: RF OFF Mode > Full Attenuation has higher priority than "Fixed" or "Manual".
"Auto"
Adjusts the attenuator settings within the full variation range automati-
cally.
"Fixed"
Fixes the attenuator and amplifier stages at the current position and
provides signal output with constant output VSWR. The resulting var-
iation range is calculated and indicated.
This mode is coupled with ALC, and therefore only effective when
ALC is enabled.
"Manual"
Allows you to set the attenuation, Attenuation .
The user-specified nominal attenuation is useful for instruments
equipped with a mechanical step attenuator.
Similar to "Fixed" mode, relays and amplifier stages keep the speci-
fied value, providing interruption-free signal output level.
Remote command:
:OUTPut<hw>:AMODe on page 809
Attenuation
Sets the nominal attenuation of the RF signal in Mode > "Manual".
Remote command:
[:SOURce<hw>]:POWer:ATTenuation on page 1095
Attenuator Level Range
Shows the interruption-free range of the level that you can use in the currently selected
mode.
Remote command:
:OUTPut<hw>:AFIXed:RANGe:LOWer? on page 811
:OUTPut<hw>:AFIXed:RANGe:UPPer? on page 811
RF OFF Mode
Determines the state of the attenuator, when the RF signal is switched off.
The value is not affected by an instrument preset (PRESET key or *RST) and the
"Save/Recall" function. It is reset only by factory preset.
"Unchanged"
Freezes the setting of the attenuator.
Use this mode if a constant VSWR (Voltage Standing Wave Ratio) is
required.
Improving Level Performance
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