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An expert said that it is necessary to modulate low frequency signals to sent long distances.

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An expert said that it is necessary to modulate low frequency signals to sent long distances.

1. What is meant by modulation

2. What are the different types of modulation

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1. Modulation is the process of super posing a low frequency (audio signal) information on to a high frequency carrier wave.

2. Three types of modulation using sinusoidal carrier waves

  • Amplitude modulation
  • Frequency modulation
  • Phase modulation
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