Rohde & Schwarz R&S SMW200A - Triggering Several Instruments with a Common Trigger Signal

Multi-Instrument Setups
R&S
®
SMW200A
648User Manual 1175.6632.02 ─ 30
If the secondary 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 secondary instruments, start signal generation.
That is, activate the baseband generator.
2. In the primary instrument, activate the baseband generator.
3. In the secondary 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.
To compensate signal mis-alignment:
1. Connect an oscilloscopes or network analyzer.
Observe the generated signals.
2. Compare the signal start in the instruments.
3. To compensate signal delay, select "I/Q Modulator > I/Q Digital Impairments"
4. Vary the value of the parameter "I/Q Delay" to achieve time aligned signals.
5. If the value range is insufficient, enable also or alternatively a trigger delay.
Select "Baseband > <Dig Standard> > Trigger In" > "Delay".
6. Vary the values until the signals are aligned in time.
10.3.1.3 Further Information
See:
●
Trigger settings of the used baseband source, for example Chapter 5.5.2.1, "Trig-
ger Settings", on page 252.
See also Chapter 12.2, "Configuring Local and Global Connectors", on page 714.
10.3.2 Triggering Several Instruments with a Common Trigger Signal
The configuration described in this section is useful, in the following cases:
●
R&S SMW is equipped with Standard baseband generator
●
Or primary-secondary instrument mode is not used or possible
Using the same trigger event on several instruments is useful to synchronize the trans-
mitted and received signals. Some test cases also require that you control the signal
generation start and determine the exact generation start time by a defined trigger
event. The signal generation start can be controlled, for example, by triggering the
instrument internally or externally from the DUT.
Generating Time-Aligned Baseband Signals