Rohde & Schwarz SMIQ02B - Fig. 2-35 Effect of I;Q Impairment; I;Q Impairment; Table 2-3 Parameter Setting Ranges

SMIQ Vector Modulation
1125.5555.03 E-82.69
2.8.1 I/Q Impairment
For simulating an impairment of the vector modulation, a residual carrier (LEAKAGE), imbalanced I and
Q modulation (IMBALANCE) and a quadrature offset can be entered. The input values for LEAKAGE
and IMBALANCE are with reference to the voltage.
Table 2-3 Parameter setting ranges
Parameter Setting range Resolution
LEAKAGE 0 ... 50 % 0.5 %
IMBALANCE -12 ... +12 % 0.1 %
QUADRATURE OFFSET -10 ... +10° 0.1°
The following figure shows the effect of I/Q impairment.
I
Q
Carrier Leakage
LEAKAGE:
I
Q
+-
+
-
IMBALANCE:
I
Q
+
+
-
-
QUADRATURE OFFSET:
Fig. 2-35 Effect of I/Q impairment