Getting Started
R&S
®
SMW200A
84User Manual 1175.6632.02 ─ 30
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The signal routing (in the standard "classic" mode of a standard baseband genera-
tor)
Signals from the baseband generators can be routed between the available paths,
and added (possibly with frequency, phase and power offsets).
3.4.1.3 Digital Baseband Input and Output ("BB Input", "I/Q Digital" Blocks)
The "BB Input" and the "I/Q Digital" blocks are the access point to the settings of the
digital interfaces.
The R&S SMW is - depending on SW and HW options - able to receive digital base-
band signals and to output digital baseband signals. A fully equipped standard base-
band instrument provides eight configurable digital interfaces. Depending on the con-
figuration, the available digital interfaces may be used as up to six inputs or up to six
outputs.
The digital baseband inputs and outputs can be used together with other
Rohde&Schwarz instruments, like signal generators, signal analyzers, the digital inter-
face module R&S
®
IQW, or the R&S
®
CMW500 Radio Communication Tester. A
Rohde&Schwarz signal generator for instance may serve as digital signal source in
test configuration requiring more than two baseband sources. A test setup with the
R&S
®
CMW500 Radio Communication Tester is suitable for testing under fading condi-
tions.
The "BB Input" block is the access point to the settings of:
●
The external digital I/Q signals
The external digital I/Q signals are further processed in the baseband section (e.g.
fading, addition of noise)
●
The signal routing (in the standard "classic" mode)
The external and internal baseband signals can be routed and added (possibly with
frequency, phase and power offsets).
The "I/Q Digital" block is the access point to the settings of:
●
The digital I/Q output signals
●
The digital I/Q impairments
3.4.1.4 Fading Simulator ("Fading" Blocks)
The "Fading" block is displayed only in instruments equipped with the option
R&S SMW-B14/-B15, fading simulator. This block controls the fading module and, in
standard mode, the signal routing at the output of this module.
The fading simulator functionality enables you to simulate real time fading effects on
the baseband signal. Provided the instrument is equipped with the required options, up
to 20 dynamic fading paths in a SISO mode (single input single output) and up to 20
paths per MIMO channel in MIMO mode can be created simultaneously.
The fading extension options provide even more functionality, for example:
●
Second option R&S SMW-B14 permits also real two-channel fading irrespective of
the RF carrier spacing of the two channels
System Overview
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