Signal Routing and System Configuration
R&S
®
SMW200A
141User Manual 1175.6632.02 ─ 16
"Digital Only/Digital Only Multiplexed"
Option: R&S SMW-K551
R&S SMW can generate digital signals with reduced speed, depend-
ing on the device connected to the digital I/Q interfaces.
The supported configuration and mapping of the generated streams
to the digital I/Q interfaces depends on the selected mode:
●
In "Digital Only" mode, up to 4 streams can be mapped to the dig-
ital I/Q interfaces.
●
In "Digital Only Multiplexed" mode, the multiplexed streams are
mapped to the digital I/Q interfaces BBMM 1/2; the mapping is
fixed.
See user manual R&S
®
SMW-K551 Generation of Digital "Slow IQ"
Signals.
Remote command:
:SCONfiguration:OUTPut:MODE on page 835
Signal Routing
Defines the signal routing in non-MIMO Standard mode. In a fully equipped instrument,
the following configurations are available:
●
"A->A, B->B"
●
"A->A, B->A"
●
"A->B, B->B"
●
"A->A and B, A->A and B"
●
"B->A and B, B-> (open)"
●
"A-> (open), B->A and B"
The preview diagram displays the signal routing for the selected configuration.
Execute "Apply" to trigger the instrument to adopt the current configuration.
Remote command:
:SCONfiguration:FADing on page 835
System Configuration LxMxN
In Advanced mode, the signal routing, i.e. the fading/baseband configuration LxMxN is
determined by three parameters, "Entities", "BB Signals", and "Streams". The available
configurations depend on the installed hardware and software options (see data
sheet).
Note: The RF outputs are disabled, if you apply new System Configuration LxMxN
and/or change the Baseband Source Configuration.
Entities (Users, Cells) ← System Configuration LxMxN
Defines the number of entities to be generated.
An entity is a self-contained independent system, consisting of its own baseband part
with possible fading simulator and noise generator and an RF part. An example of an
entity is a user/mobile station or a cell/base station in one digital standard (e.g. 3GPP
FDD, EUTRA/LTE, etc.). The R&S SMW can generate the signals of up to 8 entities.
The Table 3-5 shows the interdependency between the number of entities (L), the
number of baseband signals (M) and the number of streams (N).
System Configuration Settings
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