1. Calculate the total power of AM signal (par-A). 2. Calculate the bandwidth of AM signal (part-A). 3. Draw the spectrum of AM signal (part-A). DC Vmax Vmin m 3v 1.4 0.25 0.7 2v 1 0 1 1v 0.8 -0.36 1.9

:A modulating signal is used to modulate a carrier signal(AM modulation). Let Pr , Pc, PSB, PUSB, PLSB and u are the total power, side band power, upper side band power, lower side band power and modulation index respectively. power, carrier Prove the following: a. Pc = Pr (me) m2 b. PSB = Pr m2 PLSB = 72+m2, c. PUSB = Pr 2+m2

Q4: An AM signal: XAM(1)-100cos(100z*10³ t) + 60cos(47*10') *cos(100 * 10³ t). 1) Calculate frequency bandwidth B for XAM(t) signal. 2) Modulation index m%. '

In what ways AM is different from FM? Draw the outputs of AM and PAM. Explain how these schemes differ from each other in their formats?

1. Derive the lower cut-off frequency for the basic RC high-pass circuit in Figure 1. R, Figure 1.

1) From the plots, what is the frequency of the input signal (in samples as well as radians)? 2) From the plots, what is the frequency of the output signal (in samples and radians)? 3) What does echo do to the magnitude and phase spectra?

In AM modulation, if the modulating signal amplitude is of 3.08V and carrier amplitude is of 11.54V, then the percentage of modulation is % m=

Draw the Full Duplex ASK diagram if the bandwidth is 18,000 Hz (500 to 18,500). Also find the carriers and bandwidth in both directions. Assume there is no gap between bands.

Explain how does LCR circuit work, impedance of LCR circuit in resonance, condition for resonance in LCR circuit and also discuss quality factor in LCR circuit?

Q2: A modulating signal is used to modulate a carrier signal(AM modulation). Let Pr, Pc, PsB, PUSB, PLSB and u are the total power, carrier power, side band power, upper side band power, lower side band power and modulation index respectively. Prove the following: a. Pc = Pr (m2) m2 b. PsB = Pr m2 PT c. PUSB = PLSB 2+m2 2+m2