Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
157
User Manual 1321.1011.02 ─ 11
The R&S Spectrum Rider opens a submenu that contains the display settings for
selection.
3. Select the "Reference Level" menu item.
The R&S Spectrum Rider opens an input field to define the reference level.
The reference level should be near the maximum level that has been measured
while the spectrogram was running. In the example, the reference level should be
at about -40 dBm.
4. Enter the reference level.
The R&S Spectrum Rider now shifts the reference level of the spectrogram to the
value that you have entered.
Note that the spectrogram reference level does not affect the spectrum result dis-
play, and the spectrum reference level ("Amplitude" menu) does not affect the
spectrogram. In the screenshot, the spectrum trace is therefore exactly the same
as in the previous picture.
The result however, still does not show signal differences in detail. The only thing
that happened is that the colors have shifted, in the example to yellow, because the
color that corresponds to the reference level has shifted from green to blue. All
other colors that are part of the color scheme are still unused, because the spectro-
gram level range is still the same (150 dB).
5. Select "Display" softkey.
The R&S Spectrum Rider opens a submenu that contains the display settings for
selection.
6. Select the "Level Range" menu item.
The R&S Spectrum Rider opens an input field to define the level range.
In this example, the level range of the signal is from about -45 dBm to about
-85dBm which is about 40dB to 45dB.
7. Set "Level Range" to 45 dB.
Performing Spectrum Measurements
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