Rohde & Schwarz SMW200A - Settings: Source;State; Settings: Source; State

Applying I/Q Vector Modulation
R&S
®
SMW200A
418User Manual 1175.6632.02 ─ 16
System error correction of the I/Q modulator permits precise and repeatable measure-
ments.
If a temperature fluctuation of several degrees occurs, trigger the correction routine
using one of the following:
●
Select "I/Q Mod > I/Q Modulator > Adjust I/Q Modulator Current Frequency" or
●
Select "System Config > Setup > System > Internal Adjustment > Adjust I/Q Modu-
lator Current Frequency".
See also "Internal Adjustments" on page 1153.
Settings:
Source.........................................................................................................................418
State............................................................................................................................418
Adjust I/Q Modulator Current Frequency.................................................................... 419
I/Q Swap..................................................................................................................... 419
I/Q Wideband.............................................................................................................. 420
Crest Factor................................................................................................................ 420
(Baseband) Gain.........................................................................................................420
Optimization Mode...................................................................................................... 421
Linearize RF................................................................................................................421
Adjust Linearization Current Frequency......................................................................422
Source
Selects the input signal for the I/Q modulator. Refer to Table 6-1 for an overview of the
possible input signals and the connectors they are supplied at.
"Internal Baseband"
Selects the internal baseband signal.
"Analog Wideband I/Q Input"
Selects an external analog signal.
See also "To apply an external analog signal directly to the I/Q modu-
lator" on page 217.
"Differential Analog I/Q Input"
Enabled in instruments equipped with option Differential I/Q Inputs
(R&S SMW-K739), for RF path A.
Selects an external differential analog signal.
If the instrument is equipped with one of the High frequency options
and a "Freq > 19.5 GHz" is selected, the "Analog Wideband I/Q Input"
is automatically selected.
Remote command:
[:SOURce<hw>]:IQ:SOURce on page 1048
State
Activates/deactivates I/Q modulation.
Note: Interdependency. If "Source > Internal Baseband", the I/Q modulator is always
activated automatically when signal generation is activated ("Baseband > State > On").
I/Q modulation can, however, be deactivated later, e.g. if the relevant signal is the
baseband signal and it is directly routed to the I/Q outputs.
I/Q Modulator Settings