A signal is a function that represents a physical quantity, such as voltage or current, that varies with time or space. It can be continuous or discrete and can have different properties such as amplitude, frequency, and phase.
A system is a mathematical representation of a physical process that takes an input signal and produces an output signal. It can be linear or nonlinear, time-invariant or time-varying, and can have different characteristics such as stability, causality, and memory.
The output of a system is determined by applying the input signal to the system and using mathematical operations or transformations to produce the output signal. This can be done using techniques such as convolution, Fourier transforms, and Laplace transforms.
The output of a system can be affected by various factors such as the properties of the input signal, the characteristics of the system, and the initial conditions. External influences, such as noise and disturbances, can also affect the output of a system.
The output of a system is analyzed and evaluated using various techniques such as time-domain analysis, frequency-domain analysis, and stability analysis. These techniques help to understand the behavior of the system and its ability to meet certain specifications and requirements.
