Concurrent Excitation and Acquisition (CEA) offers fundamental advantages for NMR such as 100% signal acquisition efficiency, true zero echo time, reduction of acoustic noise, and decreased peak RF power. Bandwidth of the excitation in CEA is independent of the RF power, allowing detection very broad resonances. In this work, a CEA system is introduced with a full digital cancellation. The system uses a lock-in amplifier combined with an arbitrary signal generator. Preliminary results for NMR of various samples are represented and discussed.