. 2020 Nov 7;20(21):6361. doi: 10.3390/s20216361

Table 5.

Error definitions.

Parameter	Description
E = \|f_FFT − f_gen\|	Error, in mHz, on the frequency measurements both for fundamental and harmonics obtained via FFT
e% = 100 × \|V_FFT − V_gen\|/V_gen	Percentage error on amplitude measurements obtained via FFT (fundamental and harmonics of amplitude greater than 3% of the rated voltage, V_nom, i.e., 230 V)
e% = 100 × \|V_FFT − V_gen\|/V_nom	Percentage error on amplitude measurements obtained through FFT (harmonics of amplitude less than 3% of the nominal voltage V_nom)