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A sinusoidal carrier voltage of 80 volts amplitude and I MHz frequency is amplitude modulated by a sinusoidal voltage of frequency 5kHz producing 50% modulation. Calculate the amplitude and frequency of lower and upper side bands. |
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Answer» Solution :AMPLITUDE of both LSB and USB are equal and given by `= (mE_(c))/(2)= (0.5 XX 80)/(2)= 20 volts` Now frequency of LSB = `f_(c)-f_(s)= (1000-5)KHZ= 995kHz` Frequency of USB= `f_(c)+f_(s)= (1000+5)kHz= 1005 kHz` |
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