Q. 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
Explanation
(d) Upper side band (USB) frequency $= f_{c} + f_{m}$
$= (2.51)MHz + (12)kHz = (2510 + 12)\ kHz = 2522\ kHz$
Lower side band (LSB) frequency $= f_{c} - f\_ m$
$= (2.51)MHz - (12)kHz = (2510 - 12)\ kHz = 2498\ \ kHz$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.