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Waveform analysis
R&S
®
RTA4000
127
User Manual 1335.7898.02 ─ 08
Number
Accesses a particular history segment in the memory to display it. The newest acquisi-
tion segment has always the index "0". Older segments have a negative index. You
can also drag the slider, which is above the icons. The current segment is shown in the
index bar.
Remote command:
Overlay
Displays the segments with infinite persistence. Thus, you can see all data points of all
displayed segments of a player cycle.
Average
Calculates and displays the average of the current segment and the segments before.
At the newest segment, the average of all segments is shown. Player restart resets the
average calculation. Average requires a stable, triggered and repetitive signal.
Envelope
Displays the envelope that is built from the maximum and minimum values of the cur-
rent segments and the segments before. At the newest segment, the envelope of all
segments is shown. Player restart resets the envelope calculation.
Exit
Disables the history, and closes the segment table and the history player.
7.4.5
Exporting history data
Data of history segments can be saved to files on a USB flash drive even if the history
is not active ("Show History" is disabled). You can select to save all visible channels, or
one channel. In addition, you can save the complete time information of the segment
table.
7.4.5.1
Saving history to file
Before you can save history data, acquire the waveform and activate the history, so
that the segment table is visible.
To save the waveform history segments
1. Connect a USB flash drive to the instrument.
2. Press the [Save Load] key.
3. Select "Waveforms" in the menu.
4. Under "Points", select "History Data".
5. Under "Source", select whether you want to store all visible channels, or one of
them.
History and segmented memory