Measurements
R&S
®
RTE
345User Manual 1326.1032.02 ─ 20
8.2.4.1 Configuring reference levels
To determine reference and signal levels automatically
By default, the histogram of the measurement data is evaluated to determine the
required levels automatically. However, you can define several parameters to adapt the
evaluation to your data.
1. On the "Meas" menu, select "Reference Levels".
2. Define the "Source", the waveform for which the reference is defined. The source
can be any signal input, math or reference waveform.
3. Select automatic "Reference level mode".
4. By default, the lower reference level is defined at 10% of the signal amplitude, the
middle reference level at 50% and the upper reference level at 90%. You can
select other "Relative levels" to be used for evaluation.
If default percentages do not fit, select "User defined" and enter the percentages
for the upper, middle, and lower reference levels.
The signal levels are determined by the instrument.
5. To determine the reference levels using average values from several histograms,
enable the "Histogram averaging" option and define an "Average Count" to define
how many histograms are averaged.
To determine reference levels manually
You can configure the reference levels manually as fixed absolute or relative values.
1. On the "Meas" menu, select "Reference Levels".
2. Define the "Source", the waveform for which the reference is defined. The source
can be any signal input, math or reference waveform.
3. Select manual "Reference level mode".
4. Under "Level definition", select whether you want to define the levels using abso-
lute or relative values.
5. If you have selected absolute level definition, enter the values of the high and low
signal levels; and the distances of the reference levels to the signal levels.
6. If you have selected relative level definition, enter the values of the high and low
signal levels; and the relative reference levels.
To display reference levels and result lines
1. On the "Meas" menu, select "Gate/Display".
2. Select the tab for the measurement you want to configure.
Automatic measurements
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