Signal Routing and System Configuration
R&S
®
SMW200A
205User Manual 1175.6632.02 ─ 30
Follow the instructions provided in the sections listed below but connect six R&S SGT
instruments instead:
1. Connect all 8 instruments to a LAN.
2. Connect the six R&S SGT to the DIG I/Q interfaces of the R&S SMW
(see Figure 4-24 for explanation of the principle)
3. Distribute the internal reference frequency of R&S SMW to the other instruments.
Connect the instruments in a daisy chain.
4. Perform the configurations described in:
● Chapter 4.9.3, "How to Define the MIMO Scenario", on page 191
● Chapter 4.9.4, "How to Route the I/Q Streams to the Output Interfaces",
on page 193
● "To connect instruments to the I/Q digital interface" on page 198
5. If the test setup requires a beamformed signal, couple the local oscillators (LO)
of all instruments:
● Activate the local oscillator of the R&S SMW.
● Distribute the LO signal to the other instruments (instead of the reference fre-
quency):
a) In the R&S SMW, select "RF > Reference Frequency/LO Coupling".
Select "LO Coupling Mode > A Internal& A->B Coupled".
Set "Out State > B On".
See also "To configure LO coupling with cascaded instruments to achieve
phase coherence" on page 487.
b) Disconnect the cable from the REF OUT connector.
Connect it to the LO OUT connector of the R&S SMW.
The connected instruments are reconfigured automatically so that they use the
supplied local oscillator signal.
How to Connect External Instruments and Configure the Signal Flow
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