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Question
Explain the amplitude modulation with necessary diagrams.
Solution
1. If the amplitude of the carrier signal is modified according to the instantaneous amplitude of the baseband signal.
2. The frequency and the phase of the carrier signal remain constant.
3. It is used in radio and TV broadcasting.
Baseband signal
Carrier signal
Modulated signal
Advantages of AM
- Easy transmission and reception
- Lesser bandwidth requirements
- Low cost
Limitations of AM
- Noise level is high
- Low efficiency
- Small operating range
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