The linewidth is measured at 50% height of the DSS signal and at 10% thereof. The signal to noise is measured on the doublet left to the water signal over a noise range of 1.5 ppm between 5.5ppm and 9.5ppm. Make sure the baseline of this expanded part of the spectra is corrected. On the same doublet the splitting is measured. The splitting must go lower than 40%. This is automatically calculated by typing suppcal. In our case the following values have been obtained: 31.0 Hz at 50%
72.9 Hz at 10%
0% of resolution
154.9 of signal-to-noise.