Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
156
User Manual 1321.1011.02 ─ 11
● "Black-White"
● "Red-Purple"
● "Blue-Black"
The following examples are based on the "Green-Blue" color scheme.
1. Select the color scheme that you are most comfortable with.
The R&S Spectrum Rider adjusts the screen colors according to your selection.
It is possible that the color distribution is not ideal in the current configuration.
There are two important parameters that are required to adjust for an optimal spec-
trogram display.
● Reference level
By adjusting the reference level, you can eliminate amplitudes from the color
map that are not part of the signal.
Example: If a spectrogram reference level is at -10 dBm, the signal parts with
an amplitude of -10 dBm would be blue in the spectrogram. For signal parts
with a very small amplitude, it is dark green. Everything in between is a shade
of the colors between. As the colors are distributed over a very large range
(150dBm), it is likely that you cannot distinguish details in the signal that you
have measured.
Therefore, you should adjust the color map to the overall shape of the signal
that you are measuring. With the maximum amplitude of about -45 dBm and
the minimum amplitude of about -85 dBm, the amplitude range is about 40 dB.
With these settings in a "Green-Blue" color scheme, the spectrogram is made
up exclusively of green colors and it's not easy to distinguish amplitude levels.
To get a better result, change the spectrogram reference level to a level near
the maximum power level that has been measured first.
2. Select "Display" softkey.
Performing Spectrum Measurements
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