Signal Routing and System Configuration
R&S
®
SMW200A
212User Manual 1175.6632.02 ─ 16
To cable the instruments
Refer to Figure 3-24 for illustration the required connections. The test setup does not
show the LAN connections.
1. Connect all six instruments to a LAN.
2. Use suitable connecting cables.
The connecting cables must have the same length and type, applies for the follow-
ing connections:
● REF OUT to REF IN
● BBMM1/2 to DIG IQ
● USER6 to both USER3 connectors
● RF outputs to DUT
3. Avoid unnecessary cable lengths and branching points.
4. Provide the instruments with common reference frequency signal.
In this test setup, the internal reference frequency of R&S SMW#1 is distributed to
the other instruments. The instruments are connected in a daisy chain.
5. Use a T-connector to distribute the trigger signal generated by R&S SMW#1 and to
trigger both instruments simultaneously:
a) Connect the instruments in a star network, concerning the trigger signal
b) Connect the USER 6 output of the R&S SMW#1 to the USER 3 input of
R&S SMW#1 and the R&S SMW#1 itself.
c) Connect the USER6 connector of R&S SMW#1 to the USER3 connector of
R&S SMW#2.
In this test setup, the instruments are triggered by the trigger signal of the first one.
For more information, see Chapter 9.3.2, "Triggering Several Instruments with a
Common Trigger Signal", on page 614.
6. Connect the external instruments to the digital I and Q connectors (BBMM 1 and 2)
of the R&S SMW.
Tip: See also "To find out the correct connector" on page 192.
To configure the R&S SMW that simulates the first subset
1. Select "System Configuration" and configure:
a) A 1x8x8 MIMO scenario with coupled sources.
See "To simulate complex MxN MIMO scenarios using the "Fading and Base-
band Configuration" settings" on page 193.
b) "Subset = 1"
c) Map the I/Q streams to the output interfaces as follows: Stream A and B to RF
A and B; stream C and D to BBMM 1/2 respectively.
See Chapter 3.9.4, "How to Route the I/Q Streams to the Output Interfaces",
on page 196
How to Connect External Instruments and Configure the Signal Flow
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