Rohde & Schwarz R&S SMW200A - Analog and Digital Impairments Settings

Simulating Fading, Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMW200A
442User Manual 1175.6632.02 ─ 30
Figure 6-8: I offset (left) and Q offset (right) in the I/Q constellation diagram
6.4.2.3 Quadrature Offset
Changes the phase angle between the I and the Q vectors from the ideal 90 degrees,
while the amplitudes are maintained. A positive quadrature offset results in a phase
angle greater than 90 degrees. The effect of a positive quadrature offset in the I/Q con-
stellation diagram is shown on Figure 6-9.
Figure 6-9: Positive quadrature offset in the I/Q constellation diagram
6.4.3 Analog and Digital Impairments Settings
You can add digital impairments to each internal generated I/Q stream and analog
impairments to internal generated or external supplied analog I/Q signals
See also Chapter 6.4.2, "About the Linear I/Q Impairments", on page 440.
1. To access the dialog with settings for the analog I/Q signal, select "I/Q Mod > Ana-
log Impairments".
Impairing the Signal