Rohde & Schwarz 1440.8002.02, Getting Started

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Trying out the instrument
R&S
®
SMM100A
51 Getting Started 1179.1335.02 ─ 04
Figure 5-4: Block diagram: Generating a digitally modulated signal
5.3 Triggering the instrument with an external sig-
nal
The example configurations are rather theoretical cases, because you rarely use
the R&S
SMM100A as a standalone instrument. Usually, the instrument would be
connected to a device under test (DUT) and/or other measurement equipment. As
a rule, whenever a test setup requires two or more devices, provide them with a
common reference frequency. Some test setups require control of the signal gen-
eration start and an exact generation start time, determined by a defined trigger
event. For example, by triggering the instrument internally or externally from the
DUT.
This example illustrates the general principle of external triggering and extends
the configuration performed in
Chapter 5.2, "Generating a digitally modulated sig-
Triggering the instrument with an external signal