Characteristics of carrier signal

1. What are the characteristics of carrier signal?
2. What characteristic of the carrier signal is varied by modulation?
3. What is the difference between carrier signal and message signal?
4. How is carrier signal used?

What are the characteristics of carrier signal?

There are various forms of modulation, each designed to alter a particular characteristic of the carrier wave. The most commonly altered characteristics include amplitude, frequency, phase, pulse sequence, and pulse duration.

What characteristic of the carrier signal is varied by modulation?

In frequency modulation, the carrier amplitude remains constant, but its frequency is changed in accordance with the modulating signal.

What is the difference between carrier signal and message signal?

A high frequency signal can travel up to a longer distance, without getting affected by external disturbances. We take the help of such high frequency signal which is called as a carrier signal to transmit our message signal. Such a process is simply called as Modulation.

How is carrier signal used?

A carrier signal is used to reduce the wavelength for efficient transmission and reception. Because the optimum antenna size is one-half or one-quarter of a wavelength, an audio frequency of 3000 Hz would need a wavelength of 100 km and a 25-kilometer antenna.