MULTI-CHANNEL TRANSMITTING APPARATUS IN HOT-STANDBY MODE

摘要

PURPOSE: A multi channel transmission device of hot standby structure is provided to switch the path effectively through one standby device about a plurality of main instrument, thereby operating a system without stopping. CONSTITUTION: A main control unit of a main instrument(30) transmits the state information of main instrument which operation is impossible with an alarm signal to a preliminary control unit. The standby control unit sets the state of preliminary instrument(40) with the same of the main instrument which operating is impossible. The main control unit switches the switch of RF of corresponding main instrument into a HPA(46) of standby instrument. The standby control unit switches a signal of a corresponding main instrument by controlling the N:1 RF switch(41) and 1:N RF switch(47).