R&S SGT100A User Manual page 171

®
R&S SGT100A
State
Activates/deactivates digital I/Q impairment.
When activated, the settings for carrier leakage, I/Q imbalance and quadrature offset
become effective.
Internal predistortion for compensating the I/Q modulator is not influenced by this set-
ting.
Remote command:
[:SOURce<hw>]:BB:IMPairment:STATe
[:SOURce]:BB:IMPairment:IQOutput<ch>:STATe
I/Q Offset
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).
For more information, see
Remote command:
[:SOURce<hw>]:BB:IMPairment:LEAKage:I
[:SOURce<hw>]:BB:IMPairment:LEAKage:Q
[:SOURce]:BB:IMPairment:IQOutput<ch>:LEAKage:I
[:SOURce]:BB:IMPairment:IQOutput<ch>:LEAKage:Q
Gain Imbalance
Sets the imbalance of the I and Q vector (see
ance",
The entry is made in dB (default) or %, where 1 dB offset is roughly 12 % according to
the following:
Imbalance [dB] = 20log ( | GainQ | / | GainI |)
User Manual 1176.8674.02 ─ 07
Chapter 7.3.2.1, "I and Q
on page 133).
Signal Generator Settings
I/Q Modulation and Impairment Settings
on page 410
on page 411
Offset", on page 133.
on page 408
on page 409
on page 412
on page 412
Chapter 7.3.2.2, "Gain and Gain Imbal-
140