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A sinusoidal carrier voltage of 80 "volt...

A sinusoidal carrier voltage of `80 "volts"` amplitude and `1MHz` frequency is amplitude modulated by a sinusoidal voltage of frequency `5 kHz` producing `50%` modulation. Calculate the amplitude and frequency of lower and upper side bands.

Text Solution

Verified by Experts

Amplitude of both `LSB` and `USB` are equal and given by
`=(mE_(c))/(2)=(0.5xx80)/(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=1005kHz`
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Knowledge Check

  • A sinusoidal carrier voltage of frequency 10 MHz and amplitude 200 volts is amplitude modulated by a sinusoidal voltage of frequency 10 kHz producing 40% modulation. Calculate the frequency of upper and lower sidebands.

    A
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    B
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    C
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    D
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  • Sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50 V is amplitude modulated by sinusoidal voltage of frequency 10 kHz producing 50% modulation. The lower and upper side-band frequency in kHz are

    A
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  • The frequency of amplitude modulated wave is equal to

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