Elo TouchSystems ET1587C - 2. Primary Test Mode 800×600 at 85 Hz (for 15”); 3. Primary Test Mode 1024×768 at 85 Hz (for 17” and 19”); All other modes

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2.3 Distortion
•Trapezoid
｜AC-BD｜≦2 mm
｜AB-CD｜≦2 mm
A B
C D
•Parallelogram
a,b ≦2mm
•Pincushion and Barrel
｜c1｜, ｜c2｜≦1.5 mm for Pincushion and Barrel
｜d1｜, ｜d2｜≦2.0 mm for Pincushion and Barrel.
a
b