The limits of applicability of the SINAD method when measuring the signal-to-noise ratio, often used to estimate the sensitivity of receivers, are investigated. It is shown that if the systematic component of the error in measuring the harmonic coefficients of the generator being measured – the signal source – and of the high-frequency part of the receiver is ignored, there will be an unlimited increase in the error in measuring the sensitivity when the signal-to-noise ratio approaches the limiting value. The approach described enables the contribution to this error of components arising from distortions and noise of different origin to be separated.
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Translated from Izmeritel’naya Tekhnika, No. 5, pp. 46–51, May, 2011.
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Grigoriev, V.A., Kharin, V.N. An estimate of the error of measuring sensitivity by the SINAD method. Meas Tech 54, 544–553 (2011). https://doi.org/10.1007/s11018-011-9763-3
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DOI: https://doi.org/10.1007/s11018-011-9763-3