Characterization of radio receiver´s front-end nonlinearity by measurement of spurious-free dynamic ranges

Features and limitations of the radio receiver´s front-end nonlinearity characterization technique based on measurements of spurious-free dynamic ranges for intermodulation of different orders are investigated. The technique is familiarly illustrated by the case study (a high-quality radiomonitoring receiver is used as an example): the dynamic ranges for intermodulation of all detected orders (up to 81st) are measured by the instrumentality of the automated double-frequency test system, models of the receiver´s front-end nonlinearity are then extracted from the measurement results and validated by experiment.