Test of the spherical averaging (filtering) method. Maps of the total magnetic field (B_tot), the mean field (B₀), and the turbulent component (δB) are shown for a purely toroidal configuration (top) and for the same field with 20% added randomness (bottom). In the toroidal case, B₀ coincides with B_tot and δB ≈ 0, while the randomized case introduces a finite turbulent contribution.