What modulation means?

What modulation means?

Modulation is the process of converting data into radio waves by adding information to an electronic or optical carrier signal. A carrier signal is one with a steady waveform — constant height, or amplitude, and frequency.

What does modulate mean in science?

transitive verb. 1 : to tune to a key or pitch. 2 : to adjust to or keep in proper measure or proportion : temper. 3 : to vary the amplitude, frequency, or phase of (a carrier wave or a light wave) for the transmission of information (as by radio) also : to vary the velocity of electrons in an electron beam.

What is modulation in anatomy?

The regulation of the rate at which a specific gene is transcribed.

What is the meaning of modulator?

(mŏj′ə-lā′tər) 1. A device used to modulate an electromagnetic wave. 2. A substance that modulates the activity of a molecule or a biochemical pathway, especially a receptor modulator.

What is modulation example?

A modulator is a device or circuit that performs modulation. Examples are amplitude modulation (AM) in which the amplitude (strength) of the carrier wave is varied by the modulation signal, and frequency modulation (FM) in which the frequency of the carrier wave is varied by the modulation signal.

Why is modulation needed?

The signals within 20 Hz to 20 kHz frequency range can travel only a few distances. To send the message signal, the length of the antenna should be a quarter wavelength of the used frequency. Thus, modulation is required to increase the frequency of the message signal and to enhance its strength to reach the receiver.

What are the types of modulation?

There are three types of Modulation:

• Amplitude Modulation.
• Frequency Modulation.
• Phase Modulation.

Why do we need modulation?

What is modulation formula?

Equation 1. m(t) = Am cos (2*pi*fm*t), Am=3, fm=5 Hz, t=time. Equation 2 represents the carrier wave which is just another sinusoidal wave function. Equation 3 is the standard form of the modulated wave by the method of amplitude modulation.

What is the main purpose of modulation?

The purpose of modulation is to impress the information on the carrier wave, which is used to carry the information to another location. In radio communication the modulated carrier is transmitted through space as a radio wave to a radio receiver.

What is an example of modulation?

An example of modulation is early telegraph technology. A demodulator is typically known as a radio tuner.

What does modulating mean?

a. the act or process of superimposing the amplitude, frequency, phase, etc, of a wave or signal onto another wave (the carrier wave) or signal or onto an electron beam. mod•u•la•tion. n. 1. the act of modulating.

How does modulation work?

Modulation is what takes a signal from low frequencies (the message) and pulls it up to a higher frequency (the carrier). The idea is simple: Multiply your message by a high frequency carrier, such as 680 kHz.

What does modulate mean?

Definition of modulate. transitive verb. 1 : to tune to a key or pitch. 2 : to adjust to or keep in proper measure or proportion : temper. 3 : to vary the amplitude, frequency, or phase of (a carrier wave or a light wave) for the transmission of information (as by radio) also : to vary the velocity of electrons in an electron beam.