Stimulus light source: LED; single alternating working mode; emission power no higher than 3.66mW during its operation, maintenance, repair or under faulty conditions.

Stimulus light luminance: 0.5 ~ 318nt (1.6 ~ 1000asb)

Stimulus light brightness level: 15 levels, each level with 2dB

Brightness error of each indicator:±20%;

Background light luminance: 0.02 cd/m2,±20%

Dimension and shape of stimulus indicator: circular indicator with diameter of 2mm, nominal solid angle: Ω = 2.88 × 10-5, tolerance ± 15%

Time characteristic for the appearance of stimulus indicator

Stimulus lasting time: 0.1s, 0.2s, 0.5s selectable with tolerance of ±20%

Stimulus interval time: 0.5s, 1s, 2s selectable with tolerance of ±20%

Distance between chinrest center and screen center: 330mm±16mm

Chinrest moving range: up-down direction ≥35mm and horizontal direction≥15mm.