Question:
The function of a pre-emphasis circuit in a communication system is to boost
The function of a pre-emphasis circuit in a communication system is to boost
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Pre-emphasis boosts high frequencies; de-emphasis reduces them at receiver.
Updated On: Jul 2, 2026
- the amplitude of modulated signal
- the higher audio frequencies
- the lower audio frequencies
- the whole audio band
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The Correct Option is B
Solution and Explanation
Concept:
Pre-emphasis is used in FM systems to improve signal-to-noise ratio.
Step 1: Nature of noise Noise in communication systems mainly affects higher frequencies.
Step 2: Problem Higher frequency components get more noise distortion.
Step 3: Pre-emphasis action Boosts higher frequency components before transmission.
Step 4: De-emphasis At receiver, inverse process restores original signal.
Step 5: Conclusion \[ \boxed{\text{Higher audio frequencies are boosted}} \]
Final Answer: \[ \boxed{(B)} \]
Step 1: Nature of noise Noise in communication systems mainly affects higher frequencies.
Step 2: Problem Higher frequency components get more noise distortion.
Step 3: Pre-emphasis action Boosts higher frequency components before transmission.
Step 4: De-emphasis At receiver, inverse process restores original signal.
Step 5: Conclusion \[ \boxed{\text{Higher audio frequencies are boosted}} \]
Final Answer: \[ \boxed{(B)} \]
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