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Modulation Analysis
R&S
®
Spectrum Rider FPH
243
User Manual 1321.1011.02 ─ 11
2. Select "FM Domain" softkey
3. Press [AMPT] key
4. Press the "Dev per Division" softkey.
A drop-down menu to select the step interval on the frequency deviation opens.
5. Select the step interval on the frequency deviation you require.
Scale Adjustment
The scale adjustment is only available in the "FM Domain" of "Mod Trace" measure-
ment.
1. Press [BW] key.
2. Select "Scale Adjust" softkey.
The R&S Spectrum Rider performs an auto adjustment on the vertical axis in the
FM Domain of "Mod Trace" measurement.
RF Attenuation
For more information, see
Chapter 6.2.3.5, "Setting the RF Attenuation"
Preamplifier
For more information, see
Chapter 6.2.3.6, "Using the Preamplifier"
10.1.3.4
Defining Demodulation Bandwidth and Audio Lowpass Filter
Demodulation Bandwidth
The demodulation bandwidth defines the useful bandwidth used in the modulated sig-
nals.
1. Press [BW] key.
2. Select "Manual DBW" softkey.
The R&S Spectrum Rider opens an input field to select the demodulation band-
width.
3. Rotate the rotary knob to select the demodulation bandwidth you require.
Chapter 10.1.1, "Demodulation Bandwidth"
Reference Deviation
The reference deviation is available only in the FM domain, the maximum of reference
deviation setting is (demodulation bandwidth) /2.
1. Press [BW] key.
2. Select "Reference Deviation" softkey.
The R&S Spectrum Rider opens an input field to select the reference deviation.
Analog Demodulation
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