Rohde & Schwarz SMW200A - Internal Baseband Source (Baseband Blocks)

Getting Started
R&S
®
SMW200A
100User Manual 1175.6632.02 ─ 16
Functional block Required option
"I/Q Analog B" R&S SMW-B13T
"I/Q Digital A" R&S SMW-K18
"I/Q Digital B" Second option R&S SMW-K18
"RF A" R&S SMW-B103/-B106
"RF B" R&S SMW-B203/-B206
2.4.1.3 Internal Baseband Source ("Baseband" Blocks)
The "Baseband" block represents the source of the baseband signals (basebands).
This functional block is the access point to:
●
The internal baseband generator
The baseband generator contains modules for real time signal generation (Custom
Digital Modulation) and an arbitrary waveform generator (ARB).
One or two baseband generators can be fitted in an R&S SMW and operated sepa-
rately.
●
The available digital standards
Generation of digital signals in accordance with the supported standards requires
additional software options. For example, option R&S SMW-K55 generates signals
according to the EUTRA/LTE standard.
●
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).
2.4.1.4 Digital Baseband Input and Output ("BB Input" and "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
®
EX-IQ-BOX, 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
System Overview