Near-Field Communication (NFC) can be found in a wide range of applications like access control, payment, public transport, face collection, smart poster and many more. In the framework of the ANITAS project we focus on the payment application, especially on interoperability testing. Spying the NFC communication with a sniffer coil and measuring the induced voltage with an analog measurement device are the main tasks. The analog data will be analyze to find the error root cause. The goal of the ANITAS project is to improve the interoperability test methodology.