FIELD: radio equipment.
SUBSTANCE: invention relates to the field of radio measurements and allows determining the degree of identity of amplification paths exhibiting nonlinear properties. In particular, the invention can be applied to control the quality of multichannel amplifiers for various purposes, as well as evaluate the distortions introduced by the paths into the source signal. Substance: test sinusoidal signal is generated and supplied simultaneously to the inputs of two amplification paths. The filtration threshold is set based on the amplitude of the spectral components. The spectrum of the first signal is then determined at the output of the first amplification path. All spectral components with an amplitude below the filtration threshold are removed from the spectrum of the first signal. The spectrum of the first signal is memorised. The spectrum of the second signal is then determined at the output of the second amplification path. All spectral components with an amplitude below the filtration threshold are removed from the spectrum of the second signal. The correlation coefficient of the spectra of the first and second signals is then measured, retrieving the spectrum of the first signal from memory. The resulting value of the correlation coefficient is taken as an estimate of the degree of identity of the amplification paths. In another variant of the method, correlation analysis of the spectra presented on a logarithmic scale is conducted.
EFFECT: simplified implementation of the method due to the eliminated need to simultaneously determine the spectra of two signals.
6 cl, 5 dwg
