19 For the sinusoidaly modulated DSB/LC waveform shown in Fig. below/ a- Find the modulation index. W Amnx- Amin b- Sketch a line spectrum. Annd * Amin - Calculated the ratio of average power in the sidebands to that in the carrier Ps Pc - Determine the amplitude of the additional carrier, which must be added to tain a modulation index of 10% D(t) Amat ActAm Ac-Am Amin 100v 50V Ans: (a) 0.33 (b)0.055. Am-sor アC -100v (d) 17s v.

Q: 3.7 A modulating signal is of the form: m(t) = 5 sin (2000nt) and the carrier signal c(t) = 10 sin…

A:

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A: N/S = Frequency deviation by noise / maximum deviation = 156.42/4000 =0.0391 S/N = (N/S)-1=25.57

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Q: Q2:If the carrier frequency 1000hz and reference voltage =10 V with modulation Index 0.4 and…

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A:

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A:

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A:

Amplitude modulation

A radio signal can carry information in the form of sound or image for broadcasting or communication. For it to be sent to a greater distance, the signal must be changed or modulated in some way. One of the easiest way is to change the amplitude of the signal with variations of the video or the audio signal. This is called Amplitude Modulaton. In this modulation information of message is carried in amplitude of carrier signal.