A sinusoidal carrier voltage of frequency $10 M H z$ and amplitude $200 v o l t s$ is amplitude modulated by a sinusoidal voltage of frequency $10 k H z$ producing $40 %$ modulation. Calculate the frequency of upper and lower sidebands.

10010 k H z

9990 k H z

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1010 k H z

990 k H z

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10100 H z

9990 H z

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1010 M H z

990 M H z

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Solution

The correct option is D $10010 k H z$ , $9990 k H z$
Modulating signal frequency $\to 10 k H z$
Carrier signal frequency $\to 10 M H z$
$∴$ Side band frequency are
$U S B = 10 M H z + 10 k H z = 10010 k H z$
$L S B = 10 M H z - 10 k H z = 9990 k H z$

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

The correct option is D 10010kHz, 9990kHzModulating signal frequency →10kHzCarrier signal frequency →10MHz∴ Side band frequency areUSB=10MHz+10kHz=10010kHzLSB=10MHz−10kHz=9990kHz

A sinusoidal carrier voltage of frequency $10 M H z$ and amplitude $200 v o l t s$ is amplitude modulated by a sinusoidal voltage of frequency $10 k H z$ producing $40 %$ modulation. Calculate the frequency of upper and lower sidebands.

The correct option is D $10010 k H z$ , $9990 k H z$
Modulating signal frequency $\to 10 k H z$
Carrier signal frequency $\to 10 M H z$
$∴$ Side band frequency are
$U S B = 10 M H z + 10 k H z = 10010 k H z$
$L S B = 10 M H z - 10 k H z = 9990 k H z$