Disadvantages of Signals
Some of the demerits of signal are listed below:
- Data and information that are transmitted through signal are subjected to security risks, thus resulting in misuse of sensitive information.
- Signal which is to be delivered to receiver may be attenuated, which results in loss of information which was present in signal.
- Signals are prone to error during propagation by another signal or by any external factor, thus it results in degradation of quality and reliability of information.
What are the Different Types of Signals?
An electrical signal is a physical quantity that varies with time. It varies with any dependent or independent quantity. A signal can either be one-dimensional or multi-dimensional. When the function which varies with time depends only on a single variable then that type of signal is referred to as a one-dimensional signal. Examples of such signals are audio signals, biometrics like pulse or heartbeat, light wave signals, etc. On the other hand, a signal that is dependent on more than one time-dependent variable, then that type of signal is known as a multi-dimensional signal. Examples of two-dimensional signals are electromagnetic signals, video signals, etc. A signal is a mathematical representation of energy.
Thus, signal is a time-dependent function that can be dependent on one or more than one physical quantity for the transference of data and information with or without the presence of the medium. Electromagnetic wave signals can travel in a vacuum whereas sound and electrical signals require a medium for their propagation.
Table of Content
- Signals
- Characteristics of Signal
- Operations on Signal
- Classification of Electric Signals
- Applications of Signals
- Advantages of Signals
- Disadvantages of Signals