by Rado Lapuh
There is often a need in metrology to use a high precision sampling digital multi-meters in order to look at the amplitude, frequency and phase of a sinewave signal in detail. But sampling these signals and correctly configuring the meter is not always an easy task. Additionally, the meter’s sampling configuration and data processing will affect the overall estimated measurement uncertainty of the signals being sampled. This paper will cover the complexities of sampling signals and their effects on the measurement uncertainties. It will also have some examples on the use and configuration of the Keysight 3458A with MATLAB examples for Sine Fitting and a Phase Sensitive Frequency Estimator returning amplitude, phase and offset of the signal.
