Instrument Function
R&S
®
SMU200A
220Operating Manual 1007.9845.32 ─ 15
"Fixed"
The level settings are made without switching the attenuator and the
relays.
When this operating mode is switched on, the attenuator and the relays
are fixed in their current positions and the resulting variation range is
defined. The range is displayed under "Attenuator Fixed Range".
If automatic level control is activated ("ALC State = On"), the level set-
tings are made without interruption.
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 decreases with
high attenuation.
SCPI command:
:OUTPut<hw>:AMODe on page 553
Fixed Range (PEP) In
Displays the level range in which the level is set without interruption for the "Attenuator
Mode fixed" setting.
SCPI command:
:OUTPut<hw>:AFIXed:RANGe:UPPer on page 553
:OUTPut<hw>:AFIXed:RANGe:LOWer on page 552
User Variation
If the level is set using the rotary knob, the step width is defined in the User Variation
section.
Variation Active - RF Level
Activates the user-defined step width used when varying the level value with the rotary
knob.
"ON"
The level value set with the rotary knob is varied using the user-defined
step width which is entered under "Variation Step".
"OFF"
The level value set with the rotary knob is varied in steps of one unit at
the cursor position (standard operating mode).
SCPI command:
[:SOURce<hw>]:POWer:STEP:MODE on page 771
Variation Step - RF Level
Sets the user-defined step width for entering the RF level using the rotary knob. Level
variation with this step width must also be activated with "Variation Active".
SCPI command:
[:SOURce<hw>]:POWer:STEP[:INCRement] on page 770
5.5.7.3 Power-On/EMF Settings
The power-on behavior of the R&S SMU and the level display in the display header are
set in the "Power-On / EMF Settings" dialog.
RF Signal and Analog Modulations - RF Block
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