Configuring the Internal Baseband Source
R&S
®
SMW200A
329User Manual 1175.6632.02 ─ 16
Defining the Transition between the Segments
The R&S SMW provides the parameter "Next Segment Mode" to define the transition
to the subsequent segment (see the graphs in Transition examples).
●
Next Segment: by receiving a Next Segment Event, the ARB aborts immediately
the playing of the current waveform and starts playing the next segment waveform
(see Table 4-20).
●
Next Segment Seamless: by receiving a Next Segment Event, the ARB com-
pletes the processing of the current waveform before starting the next segment
waveform (see Table 4-20).
Use this setting to avoid signal gaps and wrap-around problems. Seamless transi-
tion requires segments with equal clock rates.
Another way to generate a multi-segment signal without signal gaps between the
segments is to use the provided ARB sequencer mode (see Chapter 4.8.3.4,
"Multi-Segment Waveform Sequencing", on page 337).
The Table 4-20 shows two examples of the transition from a sine-wave signal segment
to a sawtooth segment (I channel, upper curve) in the case of next segment external
triggering. The left graphic displays an abrupt transition; the right graphic, the seam-
less transition case.
Table 4-20: Transition examples
Next Segment switching Next Segment Seamless
Understanding the Trigger Examples
A simplified diagram in the ARB dialog is intended to explain the effect of the triggering
on the signal processing. The currently enabled settings for trigger and next segment
mode are considered.
The curves plotted in the dialog are textbook examples, "not measured" waveforms.
They are intended to visualize the trigger and the next segment settings more clearly.
Generating Multi-Segment Waveform Files
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