Rohde & Schwarz SMM100A, Руководство пользователя

Страница: 280 / 1088

Adding noise and predistortions, and impairing the signal
R&S
®
SMM100A
280 User Manual 1179.1341.02 ─ 05
The instrument can also simulate the effect of non-linear effects like AM/AM and
AM/PM conversion.
See user manual R&S
®
SMM-K540, R&S
®
SMM-K541 Envelope Tracking and AM/AM,
AM/PM Predistortion.
Settings:
State ............................................................................................................................280
I/Q Offset .....................................................................................................................280
Gain Imbalance ........................................................................................................... 280
Quadrature Offset ........................................................................................................281
Skew ........................................................................................................................... 281
IQ Delay ...................................................................................................................... 281
Phase Offset ................................................................................................................282
State
Activates the impairment of the I/Q signal.
If activated, the settings for I/Q offset, I/Q imbalance, and quadrature offset become
effective.
Remote command:
For analog impairments:
[:SOURce<hw>]:IQ:IMPairment[:STATe]
on page 870
For digital impairments:
[:SOURce]:BB:IMPairment:RF<ch>:STATe
on page 870
[:SOURce]:BB:IMPairment:IQOutput<ch>:STATe
on page 870
[:SOURce]:BB:IMPairment:BBMM<ch>:STATe
on page 870
I/Q Offset
Sets a carrier offset (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 car-
rier offset completely (offset = 0 percent).
For more information, see:
●
Chapter 5.2.2.2, "I and Q offset" , on page 277
●
"To optimize the carrier leakage suppression" on page 282
Remote command:
For analog impairments:
[:SOURce<hw>]:IQ:IMPairment:LEAKage:I
on page 869
[:SOURce<hw>]:IQ:IMPairment:LEAKage:Q
on page 869
For digital impairments:
[:SOURce]:BB:IMPairment:BBMM<ch>:LEAKage:I
on page 869
[:SOURce]:BB:IMPairment:BBMM<ch>:LEAKage:Q
on page 869
[:SOURce]:BB:IMPairment:IQOutput<ch>:LEAKage:I
on page 869
[:SOURce]:BB:IMPairment:IQOutput<ch>:LEAKage:Q
on page 869
[:SOURce]:BB:IMPairment:RF<ch>:LEAKage:I
on page 869
[:SOURce]:BB:IMPairment:RF<ch>:LEAKage:Q
on page 869
Gain Imbalance
Sets the imbalance of the I and Q vector.
Impairing the signal