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Waveform analysis
R&S
®
RTA4000
121
User Manual 1335.7898.02 ─ 08
Label
Opens a menu to specify user-defined text labels for the individual reference wave-
forms.
Bit ← Label
Selects the reference waveform for labeling.
Label ← Label
Enables or disables the user-defined label for the selected reference waveform.
Predefined Label ← Label
Selects a predefined label text. You can edit the text with "Edit Label".
Edit Label ← Label
Opens on-screen keypad to enter a label text. If you previously have selected a prede-
fined label, it is already written in the entry line, and you can modify it.
The maximum name length is 8 characters, and only ASCII characters provided on the
on-screen keypad can be used.
Remote command:
7.4
History and segmented memory
Using the history and segmented memory, you can access the data of previously
acquired waveforms and analyze them. For example, you can analyze signals that
occur in short bursts with long idle times, packet communication on serial buses, radar
pulses, and laser pulses. The segmented memory is used to store the waveforms and
provides a segment table to analyze the stored waveforms.
You can analyze history segments in the same way as the waveform of the latest
acquisition. All R&S
RTA4000 measurement and analysis tools are available: zoom,
cursor measurements, quick and automatic measurements, mask test, serial protocol
analysis, mixed-signal functions and so on.
The segment table and the waveform data of history segments can be saved to file.
The fast segmentation mode reduces the blind time of the acquisition.
7.4.1
Segmented memory
If an acquisition runs, the instrument stores the captured data in the memory, pro-
cesses the data and displays the waveform. The segmented memory keeps the data of
the displayed waveform and also the data of the waveforms that have been captured
before. Each stored waveform is called a segment. The record length of the segments
can be defined. The number of segments depends on the record length. The shorter
the record length, the more segments can be saved.
History and segmented memory