A speech signal of 3 text{ kHz} is used to mo | vedclass

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(A) In amplitude modulation,the modulated wave consists of the carrier frequency $f_c$ and two sideband frequencies,which are $(f_c + f_m)$ and $(f_c

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$1.003 	ext{ MHz}$ and $0.997 	ext{ MHz}$

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(A) In amplitude modulation,the modulated wave consists of the carrier frequency $f_c$ and two sideband frequencies,which are $(f_c + f_m)$ and $(f_c - f_m)$.Here,the carrier frequency $f_c = 1 	ext{ MHz} = 1000 	ext{ kHz}$.The modulating signal frequency $f_m = 3 	ext{ kHz}$.The Upper Sideband $(USB)$ frequency is $f_c + f_m = 1000 	ext{ kHz} + 3 	ext{ kHz} = 1003 	ext{ kHz} = 1.003 	ext{ MHz}$.The Lower Sideband $(LSB)$ frequency is $f_c - f_m = 1000 	ext{ kHz} - 3 	ext{ kHz} = 997 	ext{ kHz} = 0.997 	ext{ MHz}$.Thus,the sideband frequencies are $1.003 	ext{ MHz}$ and $0.997 	ext{ MHz}$.

$A$ speech signal of $3 \text{ kHz}$ is used to modulate a carrier signal of frequency $1 \text{ MHz}$ using amplitude modulation. The frequencies of the sidebands will be:

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