For testing of the appliance, a test adapter is used as an interface, which is inserted into the smart card reader of the appliance. Methods of defining nucleotide sequences of the combinatorial DNA taggants, and using such taggants for authentication and tracking and tracing an object or process are also disclosed. After the triggering of the belt pretensioner and when a predefinable condition is met, the belt pretensioner is actuated in such a way that the belt reel rotates at least to such an extent in the winding-up direction that the locking device of the belt reel opens and releases the belt webbing for unwinding. In a higher transmission rate range the duty-cycle is defined as a fixed ratio, and in a lower transmission range the duty-cycle is defined by a fixed length of the short phase of the bit period. By recessing the isolation structure prior to the formation of the gate electrode, an increased degree of poly wrap around may be obtained, thereby increasing the effective channel width.