Rohde & Schwarz R&S RTB2000, Руководство пользователя, Страница: 107 / 609

Waveform analysis
R&S
®
RTB2000
107 User Manual 1333.1611.02 ─ 11
6.4 History and segmented memory (option R&S RTB-
K15)
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
RTB2000 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.
6.4.1 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.
t
3
t
4
t
5
t
6
t
7
t
8
t
9
t
10
t
11
t
12
t
1
t
2
Segmented
memory at
time = t
5
-3 -2
-1 0
t
1
t
2
t
3
t
4
4 waveforms acquired 4 segments
Total memory 10 segments
Discarded
earlier
waveforms
t
13
t
5
12 waveforms acquired 10 segments
Segmented
memory at
time = t
13
-3 -2
-1 0
-6 -5
-4
-9 -8
-7
Figure 6-7: Segmented memory. In this example, the memory can store 10 segments.
Each segment has a timestamp time to identify when the events took place.
The history can access the stored segments and display them. When you start a new
acquisition, the memory is cleared and the segments are written anew.
History and segmented memory (option R&S RTB-K15)