| 摘要 |
at least one radio transmitter which includes an alarm information transmission apparatus for transmitting alarm information as a radio signal; said radio transmitter further including a test signal transmitting means for transmitting test signals and a setting means for setting the transmission level for transmitting said test signals at the lowest operating level; a processing apparatus with an alarm unit for receiving the alram information transmitted from said radio transmitter to carry out alarm processing in accordance with the contents of the alarm information; and said processing apparatus including a first detecting means for detecting whether or not the system operates reliably by receiving the test signals that are set at the lowest operating level from the test signal transmitting means.
|
