Instrument Function
R&S
®
SMBV100A
176Operating Manual 1407.6062.32 ─ 08
Limit - RF Level
Sets an upper limit for the RF output power.
You can use it to protect your DUT from damage due to high input power. If you enter an
RF level above this value, the instrument limits the output power to this specified value,
and generates a warning message.
However, the level indication in the status bar is not affected.
Note: The value is not affected by an instrument preset (PRESET key), *RST and the
"Save/Recall" function. It is influenced only by the Factory Preset and the factory value
is equal to maximum level.
SCPI command:
[:SOURce<hw>]:POWer:LIMit[:AMPLitude] on page 678
Offset (Level)
Sets the level offset relative to the RF level.
The level offset of a downstream instrument (e.g. an attenuator or amplifier) is entered.
The entry does not change the value of the RF level at the RF output. It only changes the
RF level displayed in the display header. The value of the RF level in the header corre-
sponds to the level at the output of the downstream instrument.
SCPI command:
[:SOURce<hw>]:POWer[:LEVel][:IMMediate]:OFFSet on page 677
Attenuator Settings
The attenuator mode is set in the Attenuator Settings section.
Attenuator Mode
Sets the attenuator mode at the RF output.
"Auto"
Standard mode.
The electronically switching attenuator switches with a 5 dB step width
at fixed switching points.
"Fixed"
The level settings are made without switching the attenuator.
When this operating mode is switched on, the attenuator and the relays
are fixed in their current positions to provide level settings without inter-
ruption. The resulting variation range is defined and displayed under
"Attenuator Fixed Range".
Note: The function is effective when automatic level control is activated
("ALC State = On").
If the normal variation range is overranged or underranged, level errors
increase considerably and the warning "Level under/overrange"
appears in the info line. The spectral purity of the output signal decrea-
ses with high attenuation.
SCPI command:
:OUTPut<hw>:AMODe on page 483
RF Signal and Analog Modulations - RF Block
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