ATLAS TileCal Digitizer Test System and Quality Control

This document describes the tests of the quality control procedure for the ATLAS TileCal digitizer unit. Since the ATLAS detector will fill most of the space in the detector cavity it will be difficult to disassemble parts of the detector. Therefore quality control is extremely important for every part of ATLAS. In Stockholm the digitizer units are tested in a testbench to ensure functionality and reliability in the ATLAS environment. The document includes a brief description of the ATLAS TileCal digitizer system and a description of the testbench setup. It also includes a description of the tests preformed and of the quality control procedure developed in Stockholm together with a production status.