| 摘要 |
PROBLEM TO BE SOLVED: To prevent the degradation in reception sensitivity by the influence of noise generated at the time of infrared ray data transmission by preventing the timings of a reception operation in a radio part and an infrared ray data transmission operation to the outside from being overlapped. SOLUTION: Radio signals received in an antenna 1 are amplified and demodulated in the radio part 2 and shaped to a waveform readable by a decoder 8 in a waveform shaping circuit 3. In the decoder 8, the calling number of the waveform shaping circuit 3 and its own calling number written in an EEPROM 12 beforehand are compared and message signals and data following the calling number are outputted to a CPU 10 when they match. In the CPU 10, when its own calling number and the message of the data from the decoder 8 are received, they are stored and preserved in a RAM 14. The data and the message signals stored in the RAM 14 are made to stand by until being outputted to the outside by infrared ray data transmission. Thus, the suplication of the data of the reception operation and a transmission operation is evaded. |
