| 摘要 |
PURPOSE:To automatically switch a radio channel to the radio channel automatically calling its own radio equipment when a receiving input declines by constituting a calling ID of a high order group ID and low order Number 4000 ID and assigning plural radio channel numbers and time slots to each group. CONSTITUTION:Radio equipment section 1, a CPU 2 which controls the operation of this device, a signal receiving section 3, and a ROM 4 which stores used channel numbers and calling IDs (group IDs and low order IDs) are provided. Since plural radio channel numbers and time slots are assigned to each group, a new channel can be caught by performing reception by successively switching the channels stored in the ROM 4 when signal reception becomes impossible by a using channel and time slot. Moreover, in case of receiving signals with a switched channel, the channel switching can be made to a proper channel by stopping the reception when the group of a give time slot is not proper. |
