An electronic vault includes an array of smart products for use in processing associated transactions. Then, a print process for forcible detection is conducted in which the printing head and the carriage motor are controlled such that the printing head ejects ink while the carriage is moving in the enlarged movable range. The transfer functions for setting AC and DC parameters, such as impedance matching, are provided by digital filters. In addition, the verification process occurs in a second phase during which some devices are released from reset mode and then those devices control the verification process.