Multi-Instrument Setups
R&S
®
SMW200A
613User Manual 1175.6632.02 ─ 16
7. Configure the baseband signal as required for the particular test setup.
Configure the trigger signal for example as follows:
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 will use common trigger signal.
See also "Starting the signal generation with the first sample" on page 242.
Configure the slave 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" > "Slave".
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 slaves and in the
master are activated.
5. Configure the baseband signal.
a) Select the same trigger mode as in the master instrument.
b) Set "Sync. Out to Trigger > On".
c) Observe the automatically selected "Trigger Source = Baseband Sync In"
Once the baseband is activated, the slave instruments are triggered by the syn-
chronization signal.
If the slave instrument is R&S SMW, the trigger parameters of all basebands are
coupled and all basebands use common trigger signal.
To start signal generation
1. In the slave instruments, start signal generation.
That is, activate the baseband generator.
2. In the master instrument, activate the baseband generator.
3. In the slave instruments, observe the value of the parameter "System Config >
Multi Instruments > Synchronization State"
The instruments are synchronized if:
● The physical connection is established
● The synchronization signal is routed property
● The baseband generators in all generators are active.
Compensate signal mis-alignment:
1. Connect an oscilloscopes or network analyzer.
Generating Time-Aligned Baseband Signals
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