ATLAS/Lar calibration system

The liquid Argon calibration board has been designed to deliver a uniform stable and linear signal whose shape is similar to calorimeter ionisation current signal over 16 bits dynamic range. 3 versions of boards with 128 pulse generators have been built using DMILL components. The performance have been measured on the last prototype (amplitude and timing measurements, linearity, uniformity, jitters,...) and will be presented in detail. Boards qualification for the whole production next year will be described.