  A basic prototype for an analog hadron calorimeter for a future linear
collider detector is currently being realized by the CALICE collaboration. The
aim is to show the feasibility to build a realistic detector with fully
integrated readout electronics. An important aspect of the design is the
improvement of the jet energy resolution by measuring details of the shower
development with a highly granular device and combining them with the
information from the tracking detectors. Therefore, the signals are sampled by
small scintillating tiles that are read out by silicon photomultipliers. The
ASICs are integrated into the calorimeter layers and are developed for minimal
power dissipation. An embedded LED system per channel is used for calibration.
The prototype has been tested extensively and the concept as well as results
from the DESY test setups are reported here.
