The completed passage can be given as;
Modulation is the process of changing a property of a radio wave for the purpose of sending information. In AM, the amplitude of a wave is modified; in FM, the frequency of a wave is modified.
- A carrier wave by itself does not have any data information. Modulation is the process by which a particular property of the carrier wave is altered with another wave called modulation signal.
- Modulation can be done by altering different characteristics of a wave such as frequency, amplitude, phase etc.
- In amplitude modulation, the information is encoded in the carrier wave by altering the amplitude of the carrier wave in accordance with the variations in the data signal being transmitted.
- In frequency modulation, the information is encoded in the carrier wave by altering the frequency of the carrier wave according to the fluctuations in the data signal being transmitted.
Learn more about FM and AM transmissions here:
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