The present invention provides a mechanism for recording only a received radio signal conforming to recording conditions and discarding a received radio signal not conforming to the recording conditions. The radio communication unit includes: (a) a signal detector for detecting a feature quantity of a received radio signal; (b) a signal-reception processing unit for inputting a received radio signal to be input to the signal detector or a received radio signal that has been output from the signal detector to demodulate the received radio signal; (c) a data judgment unit for determining whether the received radio signal demodulated by the signal-reception processing unit is correct or incorrect and/or for determining the characteristics of the received radio signal demodulated by the signal-reception processing unit; (d) a condition setting section for inputting recording conditions of the received radio signal; and (e) a signal judgment unit for: inputting feedback signals from the signal detector, the signal-reception processing unit, and the data judgment unit; using at least a part of the feedback signals to determine whether the received radio signal conforms to the recording conditions; and controlling the received radio signal prior to signal processing to be recorded into a signal recording unit on the basis of a result of the determination.