Principles of communicationEasy
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 :-
Options
A.2512 kHz and 2508 kHz
B.2522 kHz and 2488 kHz
C.2502 kHz and 2498 kHz
D.2522 kHz and 2498 kHz
Solution
fm = 12 kHz and fc = 2.51 MHz = 2510 kHz
∴ USB = fc + fm = 2510 + 12 = 2522 kHz
LSB = fc - fm = 2510 - 12 = 2498 kHz
∴ USB = fc + fm = 2510 + 12 = 2522 kHz
LSB = fc - fm = 2510 - 12 = 2498 kHz
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