Features of the Determination of the Complex Transfer Coefficients of a Frequency Converter by Methods of Combined Measurements

We consider causes that limit the accuracy of the measurements of complex transfer coefficients (CTCs) of a frequency converter by methods based on various combinations of parallel and series connections of the indicated converters. It is impossible to carry out such measurements without using a reciprocal frequency converter. It was established that the limiting accuracy of the given measurement methods was determined by the degree of reciprocity of at least one of the frequency converters.