Instrument Function
R&S
®
SMU200A
283Operating Manual 1007.9845.32 ─ 15
Fig. 5-13: Effect of a negative gain imbalance
SCPI command:
[:SOURce<hw>]:IQ:IMPairment:IQRatio[:MAGNitude] on page 724
Quadrature Offset - I/Q Mod
Sets the quadrature offset.
An ideal I/Q modulator sets the phase angle to exactly 90 degrees. With a quadrature
offset, the phase angle between the I and Q vector deviates from the ideal 90 degrees,
the amplitudes of both components are of the same size. In the vector diagram, the
quadrature offset causes the coordinate system to shift.
A positive quadrature offset means a phase angle greater than 90 degrees:
I/Q Modulation - I/Q Mod Block
To Next Page
Loading...
