In many cases the medium in which the wave is being propagated does not permit a direct visual image of the form. In these cases, the term 'waveform' refers to the shape of a graph of the varying quantity against time or distance. An instrument called an oscilloscope can be used to pictorially represent the wave as a repeating image on a CRT or LCD screen.
By extension of the above, the term 'waveform' is now also sometimes used to describe the shape of the graph of any varying quantity against time.
Other waveforms are often called composite waveforms and can often be described as a combination of a number of sinusoidal waves or other basis functions added together.
The Fourier series describes the decomposition of periodic waveforms, such that any periodic waveform can be formed by the sum of a fundamental component and harmonic components. Finite-energy non-periodic waveforms can be analyzed into sinusoids by the Fourier transform.
Waveform Generators feature less than 40 psec jitter.(Agilent Technologies Announces 30 MHz Function/ Arbitrary Waveform Generators with Unparalleled Signal Accuracy)
Aug 11, 2010; Featuring 30 MHz sine, square, and pulse waveform bandwidth, 1-channel Model 33521A and 2-channel Model 33522A deliver...