The configuration of optical switch and traveling-wave pockels cell (Cr:GaAs-LiTaO3) is described in this paper. Using Electro-Optic Sampling measurement with fs laser pulse as exciting and sampling beam, we have succeeded in generating and measuring ps ultrashort electrical pulse with a rise-time of 5 ps. Using Yamashita' s stripline design formula and under quasi-TEM mode approximation, we have analyzed the stripline dispersion and the wavefront distortion as the pa electrical pulse travels along the stripline. It is concluded that the short leading edge of ps electrical pulse was broadened and the slow decaying trailing edge was shortened because of the stripline dispersion.