A carrier wave of frequency 10 MHz is modulated by a signal of frequency 5 kHz. What are the frequencies of the sidebands produced?

A. 10.005 MHz and 9.995 MHz — The sideband frequencies in amplitude modulation are given by f_c + f_m and f_c - f_m. Converting 5 kHz to 0.005 MHz, we get 10 + 0.005 = 10.005 MHz and 10 - 0.005 = 9.995 MHz.

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$A carrier wave of frequency f_{c} = 10 MHz is modulated by a signal of frequency f_{m} = 5 kHz . What are the frequencies of the sidebands produced?$

A. $10.005 MHz and 9.995 MHz$
B. $10.05 MHz and 9.95 MHz$
C. $15 MHz and 5 MHz$
D. $10.5 MHz and 9.5 MHz$

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Correct answer: A — $10.005 MHz and 9.995 MHz$

Solution

The sideband frequencies are f_{c} \pm f_{m} . Given f_{c} = 10 MHz and f_{m} = 0.005 MHz, the sidebands are 10 + 0.005 = 10.005 MHz and 10 - 0.005 = 9.995 MHz .

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A carrier wave of frequency fc​=10 MHz is modulated by a signal of frequency fm​=5 kHz. What are the frequencies of the sidebands produced?

Solution

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More Communication Systems practice questions

$A carrier wave of frequency f_{c} = 10 MHz is modulated by a signal of frequency f_{m} = 5 kHz . What are the frequencies of the sidebands produced?$