Applying I/Q Vector Modulation
R&S
®
SMW200A
421User Manual 1175.6632.02 ─ 16
Remote command:
[:SOURce<hw>]:IQ:GAIN on page 1049 (for analog I/Q signal)
[:SOURce<hw>]:BB:IQGain on page 1049 (for digital I/Q signal)
Optimization Mode
Selects the optimization mode.
For information on the I/Q modulation performance in any of the modes, see the data
sheet.
Option: R&S SMW-K544
The value selected here is used also as optimization mode for the user-defined fre-
quency response corrections, and vice versa.
See user manual R&S
®
SMW-K544 User-Defined Frequency Response Correction.
"Fast"
Fast optimization by compensation for I/Q skew.
This mode suitable in time sensitive environments.
"High Quality Table"
Enabled if R&S SZU is connected to the R&S SMW and the connec-
tion is active.
This mode provides improved optimization while maintaining setting
time.
"High Quality"
With "Source > Internal Baseband", enables an optimization by com-
pensation for I/Q skew and frequency response correction.
This mode generates flat signal but requires longer setting time and
leads to signal interruption.
Note:
Do not use the mode "I/Q Modulator > Optimization Mode > High
Quality" in combination with the modes "RF Level > Setting Charac-
teristics > Uninterrupted Level Settings/Strictly Monotone".
The high quality I/Q optimization leads to RF signal interruption. The
requirements of the RF level modes "Uninterrupted Level Settings"
and "Strictly Monotone" can not be fulfilled.
Remote command:
[:SOURce<hw>]:BB:IMPairment:OPTimization:MODE on page 1015
[:SOURce<hw>]:CORRection:FRESponse:RF:OPTimization:MODE
on page 1036
Linearize RF
Option: R&S SMW-K541
nables an automatic AM/AM predistortion of the non-linear RF chain.
During RF linearization, the "Digital Predistortions AM/AM and AM/PM" settings are
disabled.
Remote command:
[:SOURce<hw>]:IQ:DPD:LRF:STATe
See user manual R&S®SMW-K540, R&S®SMW-K541 Envelope Tracking and AM/AM,
AM/PM Predistortion.
I/Q Modulator Settings
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