Question

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 2508KHz
B. 2522KHz and 2488KHz
C. 2502KHz and 2498KHz
D. 2522KHz and 2498KHz

Answer 1

Correct Answer - D
Here,v,=1 2KHz,`v_(c)=2.51MHz=2510KHz`
The upper side band frequency =2510+12=2522 KHz
The lower side band frequency `=2510-12=2498KHz`.