Instrument Function
R&S
®
SMU200A
217Operating Manual 1007.9845.32 ─ 15
level offset the level displayed in the header does not correspond to the level at the RF
output, but rather to the level at the output of the downstream instrument.
This allows the desired level at the output of downstream instruments to be entered. The
R&S Signal Generator changes the RF output level according to the set offset.
However, the level entered and displayed in the "Level" menu of the "RF" function block
always corresponds to the RF output level. Any level offset is not taken into consideration.
The level offset is entered in the "Level" menu. Here it is also possible to set the level
without taking the offset into consideration, and to make other settings, such as level
offset, attenuator mode, power-on state.
The correlation is as follows:
"Level" (in header) = "RF output level" (Level in menu) + "Level offset" (Offset in menu)
The RF output is protected against overloading by an external signal applied to the RF
output (seechapter 5.5.10, "Overvoltage Protection", on page 232 ).
Setting the RF level
To change the RF level, press the LEVEL key and enter the desired level. Changes to
the RF level have an immediate effect (without confirmation with the Enter key) on the
output signal.
In the case of two-path instruments, adjustment of the RF level affects the respective
path. To change the RF frequency of the Path B, press the LEVEL key again.
RF Level
Enters the RF level, considering the level offset.
dBm, dBµV, mV and µV can be used as the level units. The 4 unit keys are labeled with
these units.
Note: The SCPI command sets the level of the "Level" display, i.e. an entered level offset
is taken into consideration in the level value.
SCPI command:
[:SOURce<hw>]:POWer[:LEVel][:IMMediate][:AMPLitude] on page 765
5.5.7.2 RF Level
To open the "RF Level/EMF" dialog, select "RF/A Mod > Configure > Level/EMF" or use
the MENU key under "RF/A Mod".
The combined menu "RF Level / EMF" is divided into the several sections.
The top sections of this dialog provide access to the level and attenuator settings. The
offset-free level, attenuation mode, level offset and level limit are set in the top section of
RF Signal and Analog Modulations - RF Block
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