A.曼徹斯特碼 B.雙極性碼 C.格雷碼 D.莫爾斯碼
A.1200 B.1400 C.1600 D.1800
A.0.75(開)-2.0(關)-0.75(開)-1.0(關)-1.5(開)-24.0(關) B.0.75(開)-1.0(關)-0.75(開)-1.0(關)-2.5(開)-24.0(關) C.0.85(開)-2.0(關)-0.65(開)-1.0(關)-1.5(開)-24.0(關) D.0.85(開)-1.0(關)-0.65(開)-1.0(關)-2.5(開)-24.0(關)