Best-fit spectral parameters obtained from the phase-resolved spectroscopy of the Suzaku observation of EXO 2030+375. The XIS (in 0.2–12 keV energy range), PIN (in 10–70 keV energy range), and GSO (in 40–600 keV energy range) pulse profiles of the pulsar are shown in the top three panels of both sides of the figure, respectively. The other panels on the left side show the spectral parameters obtained from pulse-phase-resolved spectroscopy by using a partial covering model with a neutral absorber, whereas the panels in the right side shows the same for the partial covering model with a partially ionized absorber. The errors shown are estimated for the 1σ confidence level.