ATLAS TileCal Timing

The ATLAS TileCal digitizer boards are designed to compensate for time delays in the calorimeter modules. In this report a method is described to determine the time delays and how to correct for them. The analysis is made using testbeam pion data from 2002 and 2003. The result shows that the sampling clock of the digitizers in the barrel calorimeter can be adjusted in such a way that there always is one sample within 1.5 ns from the pulse peak.