Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
191
User Manual 1321.1011.02 ─ 11
way to detect intermittent signals or the maximum values of fluctuating signals, for
example.
Using the max hold trace mode automatically activates the max peak detector.
●
Min Hold
The trace shows the minimum power levels that have been measured at each
pixel.
To overwrite a min hold trace, change a parameter in a way that the results cannot
be compared any more (e.g. the span). Using the min hold trace mode is a good
way to highlight signals within noise or suppress intermittent signals.
Using the min hold trace mode automatically activates the min peak detector.
●
View
The view trace mode freezes the current trace and aborts the measurement.
Using the view trace mode is a good way to evaluate the trace, for example with
markers.
6.2.6.2
Selecting the Detector
The number of measurement results collected in a single sweep usually is very high,
especially if the span is large. However, the display of the R&S Spectrum Rider can
display only 711 results in horizontal direction, as it is limited by the number of pixels
that are available on the display. Therefore, it has to combine measurement results to
fit them on the display. In that case, one pixel represents a frequency range = span /
711.
The detector determines the way the R&S Spectrum Rider combines and displays the
results for one pixel. The data base is the video voltage of the analyzer.
1. Press [TRACE] key.
2. Select "Detector" softkey.
The R&S Spectrum Rider displays the submenu to select the trace detector.
3. Select the detector you want to use.
If the "Auto Detector" selection is active, the selection of the trace detector follows
The R&S Spectrum Rider provides several types of detectors.
●
Auto Peak
If the auto peak detector is active, the R&S Spectrum Rider displays both the maxi-
mum and the minimum power levels that were measured in the frequency range
covered by a pixel.
Therefore, the auto peak detector loses no information. If a signal power level fluc-
tuates (e.g. noise), the width of the trace depends on the magnitude of the signal
fluctuation. The auto peak detector is the default detector.
●
Max Peak
If the max peak detector is active, the R&S Spectrum Rider displays only the maxi-
mum power levels that were measured in the frequency range covered by a pixel.
The max peak detector is useful for measurements on pulse or FM signals, for
example.
Configuring Spectrum Measurements
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