The control of an output signal by an input signal resulting in the output signal having some (or all) of the characteristics of the input signal is known by which of the following terms?
Answer (2)
The control of an output signal by an input signal that reflects characteristics of the input is known as modulation. This process is essential in communication systems, such as radio and television, where signals are transmitted over distances. There are various types of modulation, including amplitude, frequency, and phase modulation, each serving specific purposes in the field of engineering and physics.
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The term you are looking for is 'modulation.' Modulation is a process in which the characteristics of a carrier signal are varied according to an input signal, which contains the information. This concept is widely used in communication systems such as radio, television, and telecommunication.
Here are some key points to understand modulation:
Carrier Signal : This is a high-frequency signal that can travel long distances. It serves as a baseline for modulation and carries the information signal to its destination.
Input Signal : Also known as the modulating signal, it is the information you want to send. This could be an audio signal in a radio broadcast or data in a communication system.
Output Signal : The result of the modulation process. It has the frequency and phase of the carrier and the variations according to the input signal.
Types of Modulation :
Amplitude Modulation (AM) : Changing the amplitude of the carrier signal according to the input signal.
Frequency Modulation (FM) : Varying the frequency of the carrier signal based on the input signal.
Phase Modulation (PM) : Altering the phase of the carrier signal in relation to the input signal.
The purpose of modulation is to enable the transmission of the input signal over large distances and to allow multiple communication signals to be transmitted over a single communication channel. Understanding modulation is fundamental in both Physics and Engineering as it forms the basis of modern wireless and wired communication systems.
