Signal Routing and System Configuration
R&S
®
SMW200A
113User Manual 1175.6632.02 ─ 30
I/Q stream mapper
Irrespectively of the used signal routing method, it is possible to reconfigure the distri-
bution and mapping of the I/Q streams to the output connectors.
Depending on the installed hardware options and the enabled "System Configuration >
Fading/Baseband Configuration", up to eight logical I/Q streams, stream A to stream H,
can be generated. The R&S SMW offers a flexible mapping functionality of these
streams to the provided output connectors.
By default, the first two streams are mapped to the RF outputs. The stream mapping of
all other streams depends on the current configuration, in particular the number of out-
put streams, number of multiple entity systems, whether the fading simulator is
bypassed or not. We recommend that you observe the stream mapping before per-
forming further configurations.
Refer to Chapter 4.4.2, "I/Q Stream Mapper Settings", on page 132 for detailed
description of the provided settings.
See also Figure 4-1.
External RF and I/Q instruments
The MIMO test scenarios with more than two Rx antennas require the signal at both
RF outputs and up to six additional RF signals. The instrument generates the required
signal and routes it to the available output connectors as defined with one of the rout-
ing possibilities. Which logical information, i.e. which stream, is output at which con-
nector is defined by the "IQ Stream Mapper" (see "I/Q stream mapper" on page 113).
The I/Q analog and digital output signal has to be processed by an additional instru-
ment. The R&S SMW provides all settings required to configure the output connectors,
to establish the connections to the connected RF instruments and to control them.
The R&S SMW acts as a primary instrument and controls setup-related parameters
of secondary instruments. A secondary instrument constitutes any connected further
processing external instrument. Examples are: R&S SGT, R&S SGS (also in combina-
tion with R&S SGU), R&S FSW.
Refer to:
●
Chapter 10.5, "Control and Operation of External Instruments", on page 667
●
Chapter 4.4.3, "External RF and I/Q Settings", on page 135 for detailed description
on the provided settings
●
Chapter 4.9.6, "How to Connect and Configure External Instruments", on page 195
for step-by-step description on how to connect and configure secondary instru-
ments.
4.3 Overview of the Input and Output Signals and Interfa-
ces
Designed as a signal generator with various application fields, the R&S SMW uses a
hardware concept that enables you to define and customize most of the input and out-
Overview of the Input and Output Signals and Interfaces
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