Configuring the Internal Baseband Source
R&S
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SMBV100B
172User Manual 1178.4460.02 ─ 03
3.6.4.6 How to Define Periodically Repeating Traces
If a marker trace is required that marks for example each frame start, it is sufficient to
define the trace ones and repeat it over the length of a waveform. This is useful if you
describe a long waveform and a periodical marker is required.
The following examples use marker traces; control lists are processed in the same
way.
To define periodical marker trace
The waveform in the example on Figure 3-16 consists of 3 frames, each frame is 100-
samples long. The waveform is processed continuously ("Trigger Mode > Auto").
Figure 3-16: Example: Defining marker traces (CONTROL LENGTH tag is not used)
To define a restart marker and a frame start marker, use the following tags:
1. The waveform is 300 samples long, i.e. set {SAMPLES: 300}.
2. Set two [TRACE] LIST tags:
● For Marker 1 that acts as a restart marker:
{MARKER LIST 1: 0:1; 10:0; 299:0}
● For Marker 2 that marks each frame start:
{MARKER LIST 2: 0:1; 10:0; 99:0}
3. Do not use the CONTROL LENGTH tag.
The length of the repeated patterns is determined by the last sample number in the
[TRACE] LIST, that is the last {Pos:State} .
Using the Arbitrary Waveform Generator (ARB)
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