Instrument Function
R&S
®
SMU200A
291Operating Manual 1007.9845.32 ─ 15
Internal predistortion for compensating the I/Q modulator is not influenced by this setting.
SCPI command:
[:SOURce<hw>]:BB:IMPairment:STATe on page 667
I/Q Offset - Digital Impairments
Sets the carrier leakage (in percent) of the amplitudes (scaled to the peak envelope power
(PEP)) for the I and/or Q signal component.
An ideal I/Q modulator suppresses the carrier leakage completely (offset = 0 percent). If
an offset is entered for a component, a carrier leakage with fixed amplitude is added to
the signal. In the diagram, all I values or Q values are offset by a fixed amplitude value
depending on the entered percentage.
Fig. 5-17: Effect of offset for the I component
Impairment of Digital I/Q Signal and Noise Generator - AWGN/IMP Block
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