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Audio sine waves of 3 kHz frequency are ...

Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true?

A

The sideband frequencies are 1506 kHz and 1494 kHz.

B

The bandwidth required foe amplitude modulation is 6 kHz.

C

The bandwidth required for amplitude modulation is 3 MHz

D

The sideband frequencies are 1503 kHz and 1494 kHz

Text Solution

Verified by Experts

The correct Answer is:
B, D
`LSB = (omega_c) = (omega_m)`
`1.5xx 10^6 - 3xx 10^3`
`= 1497 kHz`
and `USB = (omega_c) +(omega_m)`
`= 1503 kHz`
Bandwidth required
`= USB - LSB =2omega_m`
`= 2xx3 kHz = 6 kHz`.
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