Total number of mesh positions

The number of mesh positions per pitch for the fastest stage when calculating the excitation in the system.

Only fixed values in steps of 6 between 12 and 72 can be selected, as the number of Fourier coefficients is calculated from the number of mesh positions divided by 6.

This is due to the fact that at least 6 interpolation points are required to clearly describe a sinus curve by a Fourier transformation.