Multi-Instrument Setups
R&S
®
SMW200A
646User Manual 1175.6632.02 ─ 30
a) Select "Baseband > EUTRA/LTE > Trigger In"
b) Select "Trigger Mode > Armed Retrigger" and "Trigger Source > Internal"
c) Set "Sync. Out to Trigger > On".
The trigger parameters of all basebands are coupled. Once the basebands are
activated, they use common trigger signal.
See also "Starting the signal generation with the first sample" on page 240.
Configure the secondary instrument (R&S SMW)
1. Select "RF > Reference Frequency > Source > External".
Use the default reference frequency settings.
2. Select "System Config > System Config > Multi Instruments > Multi Instrument
Trigger" > "Secondary".
3. Select "State > On".
4. Observe current synchronization status.
The parameter indicates that the instruments are not synchronized.
Synchronization is achieved at the moment the basebands in the secondary instru-
ments and in the primary instrument are activated.
5. Configure the baseband signal.
a) Select the same trigger mode as in the primary instrument.
b) Set "Sync. Out to Trigger > On".
c) Observe the automatically selected "Trigger Source = Baseband Sync In"
Once the baseband is activated, the secondary instruments are triggered by the
synchronization signal.
If the secondary instrument is R&S SMW, the trigger parameters of all basebands
are coupled and all basebands use common trigger signal.
Connect the instruments and distribute the synchronization signal (R&S SMW-
B9, DACW revision ≥ 6)
► With the default connector settings of the R&S SMW, connect the instruments in a
daisy chain:
Sync/Trig. Signal
1
User 5
ADV TRIG
User 5
ADV CLK
User 5
ADV TRIG
User 5
ADV CLK
2 2
Sync/Trig. Signal
RF B
RF A
RF B
RF A
RF B
RF A
Figure 10-2: Example: Daisy chain connection for distributing the synchronization signal (simpli-
fied)*
Generating Time-Aligned Baseband Signals
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