Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

MULTIPATH DISTORTION 283ferent path differences from 1.0 mile to 6.2 miles. The curves are verysimilar to those of Figure 4. The shapes can be changed further byadjusting the initial phase of the two waves.Variation of the Amplitude with DeviationWhen the wave is modulated sinusoidally, the variation of the frequencydeviation is not linear, and this causes the unequal spacing ofthe peaks and dips as shown in Figure 1.If the same set of conditionsis used, and the variation of amplitude is plotted against the deviation,the spacing of the peaks and dips will be uniform as shown by Figure7. A further increase in deviation will cause more peaks, but will notalter the spacing if the time delay is unchanged.The equation of the amplitude is