R&S SGT100A, Руководство пользователя

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Signal Generator Settings
R&S
®
SGT100A
140 User Manual 1176.8674.02 ─ 07
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
on page 410
[:SOURce]:BB:IMPairment:IQOutput<ch>:STATe
on page 411
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 Chapter 7.3.2.1, "I and Q Offset" , on page 133.
Remote command:
[:SOURce<hw>]:BB:IMPairment:LEAKage:I
on page 408
[:SOURce<hw>]:BB:IMPairment:LEAKage:Q
on page 409
[:SOURce]:BB:IMPairment:IQOutput<ch>:LEAKage:I
on page 412
[:SOURce]:BB:IMPairment:IQOutput<ch>:LEAKage:Q
on page 412
Gain Imbalance
Sets the imbalance of the I and Q vector (see Chapter 7.3.2.2, "Gain and Gain Imbal-
ance" , on page 133).
The entry is made in dB (default) or %, where 1 dB offset is roughly 12 % according to
the following:
Imbalance [dB] = 20log ( | GainQ | / | GainI |)
I/Q Modulation and Impairment Settings