Problem 4: A DSB-SC signal is modulated by the signal m(t)=2cos 2000πt + cos 6000πt the carrier signal is c(t) = 100 cos 257fct. fc = 1 MHz where The modulated signal is u(t) = m (t)<(t) Determine and sketch the spectrum of the AM signal ⑤ Determine the average power in the frequency components.

Starting from the general expression of the frequency modulated wave, find out the expression of narrow band FM (NBFM).

An FM radio broadcast used a modulator with a frequency deviation sensitivity of 5KHz/V, a 2Vp – 10 kHz modulating signal, and a 10Vp – 88MHz carrier Signal , determine. Use this Bessel table below to solve this problem.   (a) Actual minimum bandwidth from the Bessel function table in kHz

X. The frequency spectrum of an AM signal is shown below: 1V 5.5V 1V 59kHz 51kHz a) if the modulating signal is a sine wave, write the equation of the modulating signal b) if the carrier signal is a cosine wave, write the equation of the carrier signal c) calculate the current of the AM signal flowing through a 300-ohm load

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Answer all question.

An FM signal has a maximum frequency deviation of 1500h and a modulating frequency of 500h, its total power is 6500w, applied to a resistive load of 1ohm, the carrier frequency is 400Mhz. Determine the sensitivity of the modulator, and the magnitude spectrum

1) Find the energy in the signal x[n] = 2(0.12)", n20. %3D 2) Given a periodic signal of x[n] = 2cos(2 m/4) whose period is N = 4. Find its average value and signal power. 3) Given a periodic signal of x[n] = 9e24 whose period is N=4. Find its signal power. 4) Sketch each signal and its even and odd parts. (1) x[n] = 8(0.5)' u[n] (ii) x[n]= u[n] (iii) x[n]=1+ u[n] (iv) x[n] = u[n]-u[n – 4] (v) (vi) x[n]= {6,4,2, 2}

plz ans it

Ope X. The frequency spectrum of an AM signal is shown below: 5.5V 1V 1V 52kHz 58kHz a) if the modulating signal is a sine wave, write the equation of the modulating signal b) if the carrier signal is a cosine wave, write the equation of the carrier signal c) calculate the current of the AM signal flowing through a 300-ohm load