Measurements
R&S
®
RTP
389User Manual 1337.9952.02 ─ 12
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MEASurement<m>:RESult:PPEak? on page 1367
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MEASurement<m>:RESult:RMS? on page 1367
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MEASurement<m>:RESult:STDDev? on page 1368
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MEASurement<m>:RESult:WFMCount? on page 1368
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MEASurement<m>:RESult:STARt? on page 1369
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MEASurement<m>:RESult:STOP? on page 1369
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MEASurement<m>:ARNames on page 1367
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MEASurement<m>:ARES? on page 1366
The peak and average values and the standard deviation of the long-term points are
also shown in the graph of the long-term measurement.
Stopping and starting the acquisition does not reset statistics but only stops and contin-
ues them.
The instrument only resets statistical evaluation if you change measurement setup:
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Select measurement
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Create or modify gate
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Enable/disable long-term measurement and histogram
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Enable continuous autoscale with enabled histogram
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Switch on/off channels
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Enable/disable cursors
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Tap "Reset" or "Clear sreen results"
After a reset, new statistics are compiled beginning with the next acquired waveform.
If limit and margin check is enabled, the icons in the result table indicate if statistical
results exceed a limit or margin. These violations do not initiate an action.
8.2.11.2 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.
Long-term measurements are done on the selected "Measurement for analysis / math".
See also: "Enable (Long term)" on page 392.
Automatic measurements
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