Digital process for obtaining a measured parameter from an electric signal

摘要

A process for obtaining a measured value from an electric signal with a predetermined rated frequency, wherein the electric signal is scanned with a scanning frequency that is N times the rated frequency. After analog-to-digital conversion, the measured value is determined in an analyzer. In order to determine the measured value with a comparatively high accuracy, a measured value (f.sub.Nist) is generated by means of a frequency meter (8). The measured value (f.sub.Nist) is multiplied by a factor N yielding a derived measured value (f.sub.Asoll). An analog-to- digital converter (1) is clocked with a scanning frequency (f.sub.A) that corresponds to the derived measured value (f.sub.Asoll).