R&S FSW-K7 User Manual page 172

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R&S FSW-K7
Figure 9-4: RF spectrum of FM signal with default demodulation bandwidth = 5 MHz
8. As you can see in
much too large - the actual signal takes up only a small part of the displayed range.
That means that any noise or additional signals apart from the FM signal of interest
may be included in the measured results. Select the "Demod BW" softkey and
reduce the value to 200 kHz.
Figure 9-5: RF spectrum with demodulation bandwidth = 200 kHz
The span is automatically reduced to 200 kHz as well, as only the demodulated
range can be displayed.
User Manual 1173.9240.02 ─ 23
Measurement Example: Demodulating an FM Signal
Figure 9-4, the default demodulation bandwidth of 5 MHz is
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