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Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
150
User Manual 1321.1011.02 ─ 11
6.1.7.4
Using a Trigger
For more information on using external trigger to trigger measurements, see
6.1.8
Measuring the AM Modulation Depth
The AM Modulation Depth measurement analyzes AM modulated signals and calcu-
lates the modulation depth of the signal using the measurement results. Note that the
measurement works properly only if you apply an AM modulated signal.
1. Press [MEAS] key.
2. Select "Meas Mode" softkey.
The R&S Spectrum Rider opens a submenu to select the measurement mode.
3. Select the "AM Modulation Depth"" menu item.
The R&S Spectrum Rider starts to measure the AM modulation depth.
After you have started the measurement, the R&S Spectrum Rider places three mark-
ers on the trace. The first marker is placed on the peak power level. The R&S Spec-
trum Rider assumes that position as the level of the carrier. The second and third
markers are delta markers. These are placed symmetrically on the adjacent peak val-
ues to the left and right of the carrier.
Figure 6-7: Screen layout for the AM modulation depth measurement
1 = AM modulation depth measurement mode
2 =
3 = Modulation depth
4 =
5 =
Performing Spectrum Measurements
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