Measurements
R&S
®
RTE
385User Manual 1326.1032.02 ─ 20
8.2.10.2 Long-term measurements
Long-term measurements show the behavior of measurement results over a longer
time or for many samples. Therefore the measurement results of a specified time
period are summarized into one long-term point. For each point, the current value mea-
sured at the end of the time period is written to the long-term waveform. In addition,
statistical results for each time period are calculated, saved, and reset. This reset
avoids constantly rising maximum or constantly falling minimum values until the end of
the measurement.
You can define the number of long-term points and export the long-term data, including
statistical results. The measurement histogram is a vertical histogram shown in the
long-term diagram.
See also: "Enable (Long term)" on page 388.
Performing long-term measurements
1. On the "Meas" menu, select "Result Analysis".
2. Select the subtab for the measurement you want to configure.
3. Under "Long term", tap "Enable".
4. Since the waveform can change in the process of time, enable "Continuous auto
scale" to adapt the scaling automatically.
Alternatively, tap the "Auto scale" to adjust the scale once and to see the long-term
waveform.
5. Tap "Horizontal scaling".
6. Define the "Number of points" to be shown in the long-term diagram.
7. Set the "Scale mode" that defines the period of time from which one long-term
point is created.
See "Scale mode" on page 391 for setting details.
For each long-term measurement point, the current measurement value is added
to the long-term waveform.
8. If you need the statistical data of the long-term points:
a) Tap "Result Analysis" to return to the measurement settings.
b) Enable statistics.
c) Let the measurement run and export the data when finished.
See Chapter 12.2.5, "Result analysis", on page 493.
8.2.10.3 Histograms on measurement results
Histograms are available not only for channel, math and reference waveforms, but also
on measurement results. These histograms cannot be configured, and they are shown
in a separate diagram. The source is a measurement, and all events in all acquisitions
Automatic measurements
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