Tester of the TRT front-end electronics for the ATLAS-experiment.

The VME based tester for front-end electronics of the TRT (Transition Radia tion Tracker) detector of the ATLAS-LHC experiment at CERN, Geneva, is desc ribed. The TRT read-out electronics for 424576 proportional tubes grouped o n many thousands of cards requires stringent quality control after assembly and during installation. The tester provides all required data, pulses, ti ming and power supplies for tested cards. The essential part of the tester is its software that allows for device handling as well as facilitates func tional and statistical tests. The prototype, present design as well as the new design for mass production tests are discussed.