  The ATLAS Semiconductor Tracker (SCT) together with the pixel and the
transition radiation detectors will form the tracking system of the ATLAS
experiment at LHC. It will consist of 20000 single-sided silicon microstrip
sensors assembled back-to-back into modules mounted on four concentric barrels
and two end-cap detectors formed by nine disks each. The SCT module production
and testing has finished while the macro-assembly is well under way. After an
overview of the layout and the operating environment of the SCT, a description
of the readout electronics design and operation requirements will be given. The
quality control procedure and the DAQ software for assuring the electrical
functionality of hybrids and modules will be discussed. The focus will be on
the electrical performance results obtained during the assembly and testing of
the end-cap SCT modules.
