Intermodulation noise introduced into a system by a specific piece of equipment.

The production, in a nonlinear element of a system, of frequencies corresponding to the sum and difference frequencies of the fundamentals and harmonics thereof that are transmitted through the element.

Nonlinear distortion characterized by the appearance, in the output of a device, of frequencies that are linear combinations of the fundamental frequencies and all harmonics present in the input signals. Note: Harmonic components themselves are not usually considered to characterize intermodulation distortion. When the harmonics are included as part of the distortion, a statement to that effect should be made.

In a transmission path or device, noise, generated during modulation and demodulation, that results from nonlinear characteristics in the path or device.

In the output of a nonlinear system, a frequency produced by intermodulation of harmonics of the frequencies present in the input signal.

See intermodulation noise.