The paper presents the experimental results of a 3-bit A/D converter using Taylor's method (1975, 1978), and discusses miscoding caused by the error in crystal length. The experimental setup is illustrated and described. Three electrooptic light modulators are used. The experiment is performed by applying a sinusoidal signal with an amplitude approximately equal to the half-wave voltage of the first channel of electrooptic modulator. It is experimentally shown that the A/D conversion can be performed by arranging the electrooptic modulators as suggested by Taylor. Higher-speed and lower-voltage operations may be possible by using integrated light modulators. The electrooptic light modulator need not show high extinction ratio, but the crystal length should be accurately selected for high resolution.