Configuring the Internal Baseband Source
R&S
®
SMW200A
216User Manual 1175.6632.02 ─ 30
5 Configuring the Internal Baseband Source
The R&S SMW is a vector signal generator with internal signal generation and real-
time functionality and with integrated arbitrary waveform generator.
The instrument enables you to generate various digital modulation signals in accord-
ance with the definitions in the corresponding specifications or with user-definable
characteristics. Signals are generated in realtime or played from a data store with
external and internal data. The instrument provides an interface for the loading of
externally computed modulation signals in form of waveform files.
5.1 Overview of the Signal Generation Modes
The R&S SMW can generate the signal in the following ways:
●
Generating digital modulated signals according to various digital standards
●
Generating a real-time signal
●
Playing a waveform
Generating digital modulated signals according to various digital standards
Provided the instrument is equipped with the required digital standard options, the
instrument can generate digital standards in accordance with the corresponding speci-
fications.
The required options are specified in the description of the respective digital standard
(see the corresponding user manual).
See also Chapter 5.4, "Generating Signals According to Digital Standards",
on page 220.
Generating a real-time signal
●
While utilizing the internal signal generator, the R&S SMW generates the digital
modulation signals with user-definable characteristics in real time.
See also Chapter 5.6, "Generating Custom Digital Modulated Signals",
on page 261.
●
If the required options are installed, externally supplied real-time baseband signals
can be added to the internally generated signals.
See also Chapter 4.6, "Digital Baseband Input Settings", on page 158.
Playing a waveform
The R&S SMW is equipped with an arbitrary waveform generator (ARB) used to gener-
ate test signals and to process waveform files. Waveforms are files with settings provi-
ded for repeatable tests with the same test signal. Irrespectively of the way these
waveform files are generated, they are always played from the instrument. That is, the
signal calculation is performed in advance and the instrument reacts as a player.
Overview of the Signal Generation Modes
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