Instrument Function
R&S
®
SMC100A
119
Operating Manual 1411.4060.32 ─ 04
Refer to the manual of the connected R&S NRP-Zxx power sensor for a description on
how to use the s-parameters table.
SCPI command:
Use Sensor for RF Lev. Control - Power Sensors
Enables/disables controlling of the RF level via the power sensor.
SCPI command:
n.a.
5.3.6 Overview RF Level Settings
Message "Level overrange/underrange"
If this message appears in the status line, the set level ("Level") is in the overrange (see
data sheet).
The correct level setting and signal quality cannot be guaranteed if the set level is in the
overrange/underrange.
The value of the RF level is displayed in the level field in the header of the instrument's
display and the easiest way to set the RF level is to set it directly in this field.
Be aware, that there is a difference between the RF level displayed in the header and
the RF output level set in the "Level/EMF" dialog of the "RF" block.
5.3.6.1
RF level vs. RF output level
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 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)
RF Signal - RF Block
