| 摘要 |
<p>PURPOSE:To accurately perform alarm detection for informing a master device, connected through a coaxial transmission line, of transistor abnormality of the amplification part of a slave device arranged in a dead area of a radio signal in the dead area system, consisting of the master device and slave device, with high precision by limited connection utilizing only the coaxial transmission line. CONSTITUTION:This system is equipped with the slave device 2, the master device 1 which is installed in an existent station, the coaxial transmission line 3 which connects the both, and an antenna system 4; and transistor abnormality detection parts 23A-23C detect abnormal operations of transistors 23A-23C of the slave device 2 individually; and the electric power supplied through the separation part 21 of the slave device 2 is terminated or released by a dummy variation current generation part 22 and the load current of the slave device 2 itself is increased or decreased and sent as large variation in current load to the master device 1.</p> |
