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Question

Question: A signal wave of frequency 12 kHz is modulated with a carrier wave of frequency 2.51 MHz. The upper ...

A signal wave of frequency 12 kHz is modulated with a carrier wave of frequency 2.51 MHz. The upper and lower side band frequencies are respectively

A

2512 kHz and 2508 kHz

B

2522 kHz and 2488 kHz

C

2502 kHz and 2498 kHz

D

2522 kHz and 2498 kHz

Answer

2522 kHz and 2498 kHz

Explanation

Solution

: Here υs=12kHz,υc=2.51MHz=2510kHz\upsilon_{s} = 12kHz,\upsilon_{c} = 2.51MHz = 2510kHz

The upper side band frequency =2510+12=2522kHz= 2510 + 12 = 2522kHz

The lower side band frequency =251012=2498kHz= 2510 - 12 = 2498kHz