| 摘要 |
PURPOSE:To change the correspondence channel between a handset and a base unit even during talking by operating a channel key of the handset. CONSTITUTION:It is supposed that the correspondence between the handset 1 and the base unit is executed on a channel A. In this state, when a channel key 154 is depressed in the handset 1, it is detected and a code signal CHSW commanding the channel change is generated, and after an identification code ID and the signal CHSW are converted into an MSK signal Sm by a modulation circuit 161, they are transmitted sequentially to the base unit. On the other hand, a signal CH is changed after time waiting for a prescribed period is executed and the correspondence channel is changed to a new channel (channel B) in the base unit. |
