Location in the (k_⊥, k_∥) plane of the Fourier modes that are available in a 16 sq. deg. survey conducted with EoR-Spec (R = 100) at z ≃ 3.6 and with η_⊥ = η_∥ = 1 (partially overlapping circles). The colour indicates the ratio of the corresponding clustering and shot-noise contributions to the PS (for our pessimistic LF with α = −1.1). The light and dark grey bands highlight the bins adopted in our analysis (Δk = 5 k_f^∥ ≃ 0.13 h Mpc⁻¹). These are annuli but appear as vertical bands due to the strong asymmetry in the scales along the axes. The dotted lines denote fixed values of μ = k_∥/k.