| 摘要 |
PURPOSE:To recognize the content of a data to be retrieved such as the entire reservation on that occasion by storing many data to be retrieved to a master station and sending and informing the content of the data on a slave station by the command from the slave station. CONSTITUTION:A RAM 3 of the master station is provided with memories for transmission check, transmission, reservation, reception and time and a CPU 1 accesses the data. The data from the memories is set temporarily to the transmission memory and then read by the CPU 1. Then an error code is added by an error collecting code converting circuit 6 via an interface 5 in a transmission and reception circuit 4, and converted into a serial data by a parallel/serial converting circuit 7. Further, a frequency shift keying modulation circuit 8 applies digital frequency modulation and a signal (f) from the CPU 1 is used to send the modulated signal from antennas 11... via a distribution circuit 10 through an FM transmitter/receiver 9. The data from the slave station is received by the antennas 11 and set to a reception memory via an interface 15. |
