Editing Third-order intercept point (section)

==Notes==
* The third-order intercept point is an extrapolated convergence – not directly measurable – of [[intermodulation distortion]] products in the desired output.
* It indicates how well a device (for example an amplifier) or a system (for example, a receiver) performs in the presence of strong signals.
* It is sometimes used (interchangeably with the 1&nbsp;dB [[compression point]]) to define the upper limit of the [[dynamic range]] of an amplifier.
* Determination of a third-order intercept point of a [[superheterodyne receiver]] is accomplished by using two test frequencies that fall within the first [[intermediate frequency]] [[frequency mixer|mixer]] [[passband]]. Usually, the test frequencies are about 20–30&nbsp;kHz apart.
* The concept of intercept point has no meaning for strongly nonlinear systems, such as when an output signal is clipped due to limited supply voltage.