Exam-style question
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A diagram shows a carrier wave with frequency varying sinusoidally while amplitude is constant. What is a key limitation of this modulation?.
- A.Requires high bandwidth
- B.Difficult to demodulate
- C.Susceptible to noise
- D.Low power efficiency
Model answer
What a good answer should say
- Requires high bandwidth
Explanation
Why this works
Evidence: the diagram depicts frequency modulation. Interpretation: FM requires a larger bandwidth to accommodate frequency deviations.
Implication: this bandwidth requirement is a limitation. Conclusion: the correct answer is Requires high bandwidth.
Common mistake
No common mistake is linked to this question yet.