Analog Communication - Electronic Engineering (MCQ) questions & answers for Q. 13755

Q.  The range of modulating frequency for Narrow Band FM is
- Published on 14 Oct 15

a. 30 Hz to 15 KHz
b. 30 Hz to 30 KHz
c. 30 Hz to 3 KHz
d. 3 KHz to 30 KHz

ANSWER: 30 Hz to 3 KHz
 
Narrow Band FM signal contains a carrier component and a quadrature carrier linearly modulated by the modulating signal. NBFM signal is band limited to fm i.e., modulating frequency. The bandwidth of NBFM is 2fm, hence occupies the same bandwidth as an Amplitude Modulated signal. The range of modulating frequency for Narrow Band FM is 30Hz to 3KHz

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