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_______ is equal to width of main spectral lobe.

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_______ is equal to width of main spectral lobe.

(a) Null to null bandwidth

(b) Half power bandwidth

(c) 3 dB bandwidth

(d) Absolute bandwidth

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This interesting question is from Digital Modulation topic in section Modulation Techniques for Mobile Radio of Wireless/Mobile

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Correct answer is (a) Null to null bandwidth

To elaborate: Null to null bandwidth is a simpler and more widely accepted measure of bandwidth. It is equal to the width of main spectral lobe.

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