Patent ID: 6346881
Filing Date: 2002-02-12
Classification: G06K

Abstract:
An apparatus for evaluating a radio frequency identification system having a plurality of tags, said tags operating at a selected frequency, and said tags being responsive to an output signal transmitted by an interrogator and each of said tags including a circuit for receiving the output signal transmitted by the interrogator and transmitting a return signal in response to said output signal, said apparatus comprising:(a) a probe for coupling to the circuit in one of said tags, and said probe including a plurality of lines for sampling selected signals in said circuit; (b) a controller coupled to said probe and including a processor for processing said sampled signals and memory for storing information associated with said sampled signals; and (c) a transmitter coupled to said controller and responsive to control signals from said controller for transmitting said stored information to a remote device, wherein said transmitter utilizes a communication channel operating at a different frequency than the selected frequency for the tags.