Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
149
User Manual 1321.1011.02 ─ 11
7 = Markers indicating harmonics (blue lines)
8 = Trace
9 = Harmonic distortion softkey menu
6.1.7.1
Defining the Number of Harmonics
By default, the R&S Spectrum Rider shows the signal and its first harmonic. Each har-
monic is indicated by a marker that the R&S Spectrum Rider places on the harmonic
(here M1 and M2). Note that all of the markers that have been set are normal markers
that show the absolute frequency of the harmonic.
At the same time, the R&S Spectrum Rider also calculates the values for the total har-
monic distortion (THD) and shows the results in a box above the trace diagram. The
values are output in % and dB.
If you want to see more than one harmonic, the R&S Spectrum Rider can show up to
six harmonics.
1. Press [MEAS] key.
2. Select "Harmonics" softkey.
The R&S Spectrum Rider opens an input field to define the number of harmonics.
3. Enter the number of harmonics you would like to see.
6.1.7.2
Optimizing the Display of Harmonics
The R&S Spectrum Rider places the markers on the other harmonics even if they are
outside of the display range.
1. Press [MEAS] key.
2. Select "Adjust Settings" softkey.
The R&S Spectrum Rider performs a measurement to determine the ideal refer-
ence level, frequency and span in order to display all harmonics.
6.1.7.3
Activating the Harmonics List
To see the exact frequency of the harmonic, you can activate the marker list that shows
the value for each harmonic or marker.
1. Press [MARKER] key.
2. Select "Set Marker" softkey.
The R&S Spectrum Rider opens a submenu to set the view list.
3. Select the checkbox for the "View List" menu item.
The R&S Spectrum Rider displays the marker list that contains the values for each
harmonic.
Performing Spectrum Measurements
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