| 摘要 |
PURPOSE: A speaker controller equipped with a multichannel is provided to prevent the damage to a human life caused by disable broadcast by installing UPS. CONSTITUTION: An input unit(11) comprises a plurality of input channels receiving an acoustic signal. An output unit(13) comprises a plurality of output channels transmitting the inputted acoustic signal to speaker through a line. A matrix unit(12) selectively connects the input channel and output channel. A line impedance sensor(18) senses the impedance of the line connected to the output channel. The controller(15) controls the selective connection of the input channel and the output channel of the matrix unit. A manipulation part receives the operation instruction signal of a user. The display unit(17) displays a process of inputting an instruction command and a short circuit or open circuit of a detection signal. |
