Patent ID: 7775445

Claim:
A reference card for testing card readers that are used to read a set of several different types of payment cards that are depoyed in an electronic payment system, the set of different types of payment cards exhibiting a corresponding set of diverse behaviours, the reference card comprising: a calibration coil which is configured to analyze the full frequency content of signals transmitted by a card reader under test; and an electronic circuit whose external behavior is configured to be representative of the diverse behaviors of the several different types of payment cards that are used in the electronic payment system, wherein the electronic circuit is configured to exhibit the representative external behavior to a card reader under test, wherein the representative behavior of the electronic circuit is so that positive testing of the card reader under test ensures that the card reader reads any several different types of payment cards, and wherein the reference card is of a type external to the set of several different types of payment cards that are depoyed in the electronic payment system.