Patent ID: 7425895

Claim:
A reader device for contactless reading of transponder data regarding an electromagnetic field, having a read antenna ( 10 ) connected to a receiving circuit ( 12 ) for demodulation and preparation of the transponder data, wherein the reader device includes a digital signal processor ( 16 ) connected to the receiving circuit ( 12 ) or forming part of the receiving circuit ( 12 ) for generating a display signal representing at least one of an amplitude-time curve and a frequency spectrum of the received signals, and wherein at least one of an optical display device integrated in the reader device for the at least one of the amplitude-time curve and the frequency spectrum of the received signals and an interface ( 34 ) integrated in the reader device for connecting an external optical display device ( 72 ) for the at least one of the amplitude-time curve and the frequency spectrum of the received signals is connected to a display signal output of the digital signal processor ( 16 ).