Compare amplitude and frequency modulation in term of i) Bandwidth ii) Signal Quality iii) Effect of noise on signal iv) Range

Mumbai University > Electronics > Sem 4 > Priniciples of Communication Engineering

mumbai university pce • 205  views
Parameter Amplitude Modulation Frequency Modulation
(i) Bandwidth Twice the sum of modulating signal frequency (2fm) Twice the sum of modulating signal frequency and the frequency deviation.
(ii) Signal Quality AM has poorer sound quality compared to FM, but is cheaper and can be transmitted over long distances. FM has better sound quality due to higher bandwidth.
(iii) Effect of noise on signal AM is more susceptible to noise because noise affects amplitude, which is where information is “stored” in an AM signal. FM is less susceptible to noise because information in an FM signal is transmitted through varying the frequency, and not the amplitude.
(iv) Range AM audio ranges from 535 to 1705 KHz FM audio ranges in a higher spectrum from 88 to 108 MHz
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