Ag(100) single crystal is used as an example to test the performance of the ARPES system. A set of normal emission angle resolved PES spectra were recorded using photon energies of 12 eV to 19eV with incidence angle of 45degree. The spectra are given in the adjacent figure. Dispersion, E(k), of band is clearly seen in the spectra which matches well with that of reported in the literature.