INDIVIDUAL SELECTIVE CALL RECEPTION SYSTEM

摘要: PURPOSE:To perform high-reliability detection over effective electric power operation, by arranging a previous signal, composed of specific code string, at the head part an information word string in each group. CONSTITUTION:A wave to be modulated which is received antenna demodulated receiver 22 and then converted waveform shaping circuit 23 into digital sent decoding controlling 24. Circuit 24 controls switching 26 switch battery 27 supplies 23. On detecting preamble said turns on any time for bit synchronization. If block synchronizing signal detected this state, turned off normally exclude supply respective parts except Thus, corresponding group parts. In starting source, waits source using consisting logic ''1'' ''0'' also detects work, thereby sending it alarm horn 29.