RF Level R&S SMB
1407.0806.32 4.32 E-2
RF Level
Note:
The message Level overrange/underrange appears in the info line if the set level (Level) is in the
overrange or underrange (see data sheet). The correct level setting cannot be guaranteed for the
entire frequency range if the set level is in the overrange/underrange.
The simplest way to set the RF level is to enter it directly in the header of the display.
The entry is activated by pressing the
LEVEL key. Changes to the level have an immediate effect
(without confirmation with the Enter key) on the output signal.
Remote-control command:
SOUR:POW:LEV:IMM:AMPL -30 dBm
Note:
The GPIB command sets the level of the Level display, i.e. an entered level offset is taken into
consideration in the level value (see below).
dBm, dBµV, mV and µV can be used as the level units. The 4 unit keys are labeled with these units.
The level entered and displayed in the Level field takes the offset of any downstream
attenuators/amplifiers into consideration by way of calculation. This means that with a 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 SMB
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 correlation is as follows:
Level in header = RF output level (= Level in menu) + Level offset
Level offset by the instrument
(
Offset
in the Level menu)
RF output level
(
Amplitude
in the Level menu)
Attenuation/
gain
Level at the output
of the instrument
(
Lev
in the header
area of the screen)
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 RF output is protected against overloading by an external signal applied to the RF output (see
section "Overvoltage Protection")
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