Voltage

S₁

S₂

S₃

S₄

S₅

S₆

S₇

S₈

4V_dc

On

Off

Off

On

On

Off

Off

On

3V_dc

On

On

Off

Off

On

Off

Off

On

2V_dc

Off

On

On

Off

On

Off

Off

On

1V_dc

On

Off

Off

On

On

On

Off

Off

−1V_dc

Off

On

On

Off

Off

Off

On

On

−2V_dc

On

Off

Off

On

Off

On

On

Off

−3V_dc

Off

Off

On

On

Off

On

On

Off

−4V_dc

Off

On

On

Off

Off

On

On

Off