Verification test of the analysis code for f_δ(k, z) using: an N-body simulated data vector, averaged over n = 1944 realisations of the KiDS-1000 data without IA; the code and data set-up for the KiDS-1000 analysis has N_k = 20 k-bins and three redshift bins Z₁ = [0, 0.3], Z₂ = [0.3, 0.6], and Z₃ = [0.6, 2]. The reference power, P_δ^fid(k, z), is here identical to the cosmology of the simulation (Takahashi et al. 2017). The errors (68% CI) do not marginalise over a projection kernel uncertainty. Top panel: Simulated covariance of the average data, comprising n times the area of KiDS-1000. Deviations from the expected f_δ(k, z) = 1 towards higher z and k ≳ 1 h Mpc⁻¹ are related to the finite grid pixel size in the simulation (pixelation bias). The lines are additional reconstructions using noise-free data, based on Eq. (8) and halofit without pixelation bias. Bottom panel: Same as top panel, but with statistical errors as in a single KiDS-1000 survey.