A signal of 20 kHz is being carried on a carr | vedclass

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(D) In radio communications,a side-band is a band of frequencies higher than or lower than the carrier frequency,which are the result of the modulatio

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$3020 kHz \& 2980 kHz$

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(D) In radio communications,a side-band is a band of frequencies higher than or lower than the carrier frequency,which are the result of the modulation process.The side-bands carry the information transmitted by the radio signal.The message signal is superimposed on the carrier wave.Thus,the side-bands produced have frequencies given by: $	ext{Side-band frequencies} = 	ext{Carrier frequency} \pm 	ext{Message frequency}$.Given: $	ext{Carrier frequency} = 3 MHz = 3000 kHz$ and $	ext{Message frequency} = 20 kHz$.Therefore,the side-band frequencies are: $3000 kHz + 20 kHz = 3020 kHz$ and $3000 kHz - 20 kHz = 2980 kHz$.

$A$ signal of $20 kHz$ is being carried on a carrier wave of $3 MHz$. What are the side-band frequencies?

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