Instrument Function
R&S
®
SMB100A
127Operating Manual 1407.0806.32 ─ 13
"OFF"
The level value set with the rotary knob is varied in steps of one unit at
the cursor position (standard operating mode).
Remote command:
[:SOURce<hw>]:POWer:STEP:MODE on page 348
Variation Step
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".
Remote command:
[:SOURce<hw>]:POWer:STEP[:INCRement] on page 348
Reverse Power Protection
The reverse power protection prevents against overload by an external signal applied to
the RF output of the R&S Signal Generator.
The R&S SMB equipped with frequency options up to 6 GHz includes a reverse power
protection as standard. For instruments equipped with frequency option R&S SMB-B112
or R&S SMB-B112L a reverse power protection option R&S SMB-B30 is available. Refer
to the data sheet for additional information and the respective option.
Refer to the data sheet for additional information and the respective options.
The reverse power protection is tripped when the power of the external signal becomes
too high. A relay opens and interrupts the internal connection to the RF output. This
condition is indicated in the display header by the "OVERLOAD" status message.
Overload
If an "Overload" status message is indicated in the display header, reset the overload
protection by pressing the RF ON/OFF key.
The RF input is activated when the overload protection is reset.
Remote command:
:OUTPut<hw>:PROTection:TRIPped? on page 277
:OUTPut<hw>:PROTection:CLEar on page 277
:OUTPut<hw>[:STATe] on page 278
5.3.5.3 Power-On/EMF Settings
The power-on behavior of the R&S SMB and the level display in the display header are
set in the "Power-On / EMF Settings" section of the "RF Level/EMF" dialog.
To open the "RF Level/EMF" dialog, select "RF > Configure > EMF" or use the MENU
key under "RF".
RF Block
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