Apparatus and method for remotely testing a passive integrated transponder tag interrogation system

A method of testing a passive integrated transponder (PIT) tag interrogation system having at least one antenna element and at least one remote test PIT tag fixedly positioned proximate said antenna element comprising the steps of:

• causing said antenna element to emit a field of excitation energy at an energy level sufficient to energize a PIT tag coming within said field;
• selectively enabling said remote test PIT tag to receive said excitation energy and to emit a remote test PIT tag identification signal in response thereto for receipt by said antenna element;
• and
• detecting the remote test PIT tag identification signal received by said antenna element, thereby confirming the operation of said PIT tag interrogation system;
• and
• further comprising the steps of driving said antenna element at a predetermined frequency and energy level via an antenna drive signal;
• and
• detecting the voltage present in said driven antenna element to confirm proper operation thereof;
• and further comprising the steps of determining the resonant frequency of said antenna element by:
• removing said antenna drive signal from said antenna element:
• and
• detecting the frequency of the voltage present in said antenna element as said antenna element voltage decays in the absence of said drive signal.