A microprocessor implemented method for predictive evaluation of intermodulation power in a non-linear electronic device, the method allowing to obtain a predictive function f representative of the actual behavior of the electronic device, the electronic device comprising at least one signal input and one signal output, the method comprising the following steps: - introducing an input signal comprising at least two distinct frequency components at an input of the electronic device, - measuring values representative of at least one power of at least one component of an output signal produced by the electronic device at an output of the electronic device from said input signal, - determining said predictive function f by means of at least two of said measured values, characterized in that it further comprises the following step: - predictively evaluating, by a Chebyshev transform of at least part of said function f, intermodulation power values of at least one odd-order intermodulation component of said output signal produced by an intermodulation distortion between said at least two components of the input signal, said at least one frequency intermodulation component being distinct from those on which the measured values were measured, and in that: the predictive function f comprises at least one odd part V = F.G, formed from the multiplication • of an odd function F, • and of a function G = Q ° g which is the composite ▪ of an even function g such that g: R → R +, ▪ by a real polynomial function Q in the form of a series comprising at least one term of degree q, with q ∈ R + − N the electronic device comprising at least one signal input and one signal output, the method comprising the following steps: - introducing an input signal comprising at least two distinct frequency components at an input of the electronic device, - measuring values representative of at least one power of at least one component of an output signal produced by the electronic device at an output of the electronic device from said input signal, - determining said predictive function f by means of at least two of said measured values, - introducing an input signal comprising at least two distinct frequency components at an input of the electronic device, - measuring values representative of at least one power of at least one component of an output signal produced by the electronic device at an output of the electronic device from said input signal, - determining said predictive function f by means of at least two of said measured values, characterized in that it further comprises the following step: - predictively evaluating, by a Chebyshev transform of at least part of said function f, intermodulation power values of at least one odd-order intermodulation component of said output signal produced by an intermodulation distortion between said at least two components of the input signal, - predictively evaluating, by a Chebyshev transform of at least part of said function f, intermodulation power values of at least one odd-order intermodulation component of said output signal produced by an intermodulation distortion between said at least two components of the input signal, said at least one frequency intermodulation component being distinct from those on which the measured values were measured, and in that: the predictive function f comprises at least one odd part V = F.G, formed from the multiplication • of an odd function F, • and of a function G = Q ° g which is the composite ▪ of an even function g such that g: R → R +, ▪ by a real polynomial function Q in the form of a series comprising at least one term of degree q, with q ∈ R + − N • of an odd function F, • and of a function G = Q ° g which is the composite ▪ of an even function g such that g: R → R +, ▪ by a real polynomial function Q in the form of a series comprising at least one term of degree q, with q ∈ R + − N ▪ of an even function g such that g: R → R +, ▪ by a real polynomial function Q in the form of a series comprising at least one term of degree q, with q ∈ R + − N