The receiver RXCP makes part of the system CDVI® Pass: a radio system for the access control of persons and vehicles based on radio active tags. The system is mainly composed by 3 devices: one or more active tag, one trigger antenna and one receiver. It finds application in domestic, pubblic, residential and industrial environment, both for personal and vehicular use. The users or the vehicles carrying the active card and standing in the detection zone of the trigger aerial, are identified waking-up the tag, which is normally in stand-by and decoding the tag information. The serial number of the tag, that identifies uniquely the user, is then transmitted via radio to the receiver, which, at its turn, sends the information to any access control system, through a bus RS-485 or wiegand line.