Rohde & Schwarz SMU200A - Impairment of Digital I;Q Signal and Noise Generator - AWGN;IMP Block

Instrument Function
R&S
®
SMU200A
288Operating Manual 1007.9845.32 ─ 15
5.7 Impairment of Digital I/Q Signal and Noise Generator -
AWGN/IMP Block
The R&S SMU allows the digital I/Q signal to be impaired before it is passed on to the I/
Q modulator, and also noise to be added to the signal. The noise generator can also be
used to generate a pure noise signal.
These settings are available in the block diagram in the "AWGN/IMP" function block as
well as in the menu with the same name which is opened using the MENU key.
The equipment options for the basic unit (R&S SMU with frequency option R&S SMU-
B10x) include the option R&S SMU-B13 (Baseband Main Module) for Impairments and
the option R&S SMU-K62 (Noise Generator) for "AWGN".
Two-path instruments require a second RF path (option R&S SMU-B20x) and a second
R&S SMU-B13 option (Baseband Main Module) for impairment of a signal on Path B.
Noise can be generated alternately for both paths using an option R&S SMU-K62 (Noise
Generator). Simultaneous noise generation on both paths requires a second option.
In case of two-path instruments, the output connectors can be assigned either to path A
or path B.
Selecting the menu item "I/Q Impairments (Digital Baseband)..." opens the I/Q impair-
ment settings dialog. This dialog covers the settings for I/Q impairment, like carrier leak-
age, imbalance and quadrature offset.
To access the AWGN settings, select "AWGN...". This dialog containing the settings of
the RFI signal generator, noise level configuration and CW interfering parameters.
Selecting the menu item "I/Q Out Settings" opens a dialog with the parameters for the I/
Q output signal.
The "I/Q Out Settings" dialog is available for analog and digital I/Q output signals. These
dialogs are accessable under the menu sections with the corresponging names.
In case of two-path instruments, the analog I/Q output signal can be assigned either to
path A or path B.
The settings for the digital I/Q output signal are available for path A only.
Impairment of Digital I/Q Signal and Noise Generator - AWGN/IMP Block