Signal Routing and System Configuration
R&S
®
SMW200A
143User Manual 1175.6632.02 ─ 16
An 1x8x8 MIMO configuration requires two R&S SMW, where each of the instruments
generates a subset of 32 fading channels, out of the total 64 channels.
This parameter defines which fading channels from the MIMO matrix are calculated by
the selected instrument. The "Subset" selected in each of the two connected instru-
ment has to be different.
See also Chapter 3.9.8, "How to Generate a 8x8 MIMO Signal with Two R&S SMW",
on page 209.
Remote command:
:SCONfiguration:MIMO:SUBSet on page 836
Baseband Source Configuration
Determines whether coupled or separated baseband sources are used (see "Coupled
or separate baseband sources" on page 128).
Note: The RF outputs are disabled, if you apply new System Configuration LxMxN
and/or change the Baseband Source Configuration.
"Separated"
The signal in each baseband can be and has to be configured sepa-
rately.
Separated baseband sources are required, whenever the test sce-
nario involves:
●
A mixture of internally generated and externally supplied base-
band signals
●
A mixture of internally generated signals according to different
digital standards
"Coupled/Coupled per Entity"
All required baseband signals are generated out of the same base-
band source. This mode is supported by the "EUTRA/LTE" and
"IEEE802.11 WLAN" digital standards, by the "ARB" and by applying
external digital baseband signals.
Using coupled baseband sources is advantageous in complex test
scenarios. These modes are enabled if a System Configuration
LxMxN with L > 1 and/or M > 1 is selected.
In LxMxN configuration with L > 1, the baseband sources can also be
coupled per entity.
Remote command:
:SCONfiguration:BASeband:SOURce on page 839
Duplicate Streams
(requires option R&S SMW-K550)
This parameter is enabled in the configurations 3x1x1 and 4x1x1.
In a 3x1x1 configuration for example, there are (per default) 3 basebands and 3
streams. The first two basebands can generate signals with real-time data sources.
If "Duplicate Streams > On", created is a copy of each stream after baseband / fading
block. Generated are 6 streams; 4 of them can use real-time data sources, for example
to ensure non-truncated PN sequences.
System Configuration Settings
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