Signal Routing and System Configuration
R&S
®
SMW200A
131User Manual 1175.6632.02 ─ 30
"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 917
Duplicate Streams
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.
The pair of streams created out of the same baseband are identical, in terms of con-
tent, power level and frequency. The streams are treated as individual streams in terms
of adding AWGN and shifting within the available RF bandwidth.
This feature is useful, if your test setup requires a combination of max 4 signals with
real-time data source and 4 ARB signals. For example, for performing GSM AM sup-
pression tests according to 3GPP TS 51.021, chapter 8.
See user manual R&S SMW-K550 Stream Extender.
Remote command:
:SCONfiguration:DUPLicate[:STReam] on page 919
HS Channels per
Option: R&S SMW-B9
Sets the number of channels per digital interface, where the total number of enabled
channels on all HS DIG I/Q interfaces must not exceed 8.
Remote command:
:SCONfiguration:DIQ:BBMM1:CHANnels on page 918
:SCONfiguration:DIQ:BBMM2:CHANnels on page 918
System Configuration Settings
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