An electronic apparatus comprises a conductive device frame, a signal transmitting print wiring plate arranged on said conductive device frame, incorporating a digital clock circuit and having a ground conductive member, a signal receiving print wiring plate arranged on said conductive device frame, incorporating a digital clock circuit and having a ground conductive member, a cable including a signal wire and a ground wire for a signal transmission and electrically connecting said signal transmitting print wiring plate to said signal receiving print wiring plate on said conductive device frame and an impedance element electrically connecting an arbitrary single point on the ground conductive member of said signal receiving print wiring plate to said conductive device frame, wherein said impedance element has circuit parameters equivalent to impedance characteristics between said cable ground wire and said conductive device frame.