Multi-Instrument Setups
R&S
®
SMW200A
647User Manual 1175.6632.02 ─ 30
* = I/Q, LAN etc. connections are not shown
1 = Primary instrument acting as synchronization and trigger signal source
2 = Secondary instruments: One or more cascaded instruments, receiving (and for-
warding) the synchronization and trigger signal
ADV TRIG, ADV
CLK
= Synchronization and trigger signal connectors
RF A/RF B = RF signal output connector
● Connect ADV TRIG connector of the primary instrument R&S SMW to ADV
CLK connector of the first of the secondary instrument group.
● Connect ADV TRIG connector of the first of the secondary instrument group to
the ADV CLK connector of the second of the secondary instrument group, etc.
Note: Avoid unnecessary cable length and branching points.
Use cables of the same length and type for all connections between the primary
instrument and the secondary instruments and between secondary instruments.
Configure the primary and secondary instruments R&S SMW (R&S SMW-B9,
DACW revision ≥ 6)
1. Select "System Config > System Config > Multi Instruments".
2. Select "Multi Instrument Trigger" > "Primary".
3. Select "State > On".
4. 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 use common trigger signal.
See also "Starting the signal generation with the first sample" on page 240.
5. Select "System Config > System Config > Multi Instruments > Multi Instrument
Trigger" > "Secondary".
6. Select "State > On".
7. 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.
8. 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.
Generating Time-Aligned Baseband Signals
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