| 摘要 |
PURPOSE:To eliminate the need for a master transmitter by providing a time delay for a time set at each transmitter, detecting a carrier during the time and discriminating the presence of the data glow state so as to assign sequentially the right of transmission. CONSTITUTION:As soon as a system power supply is applied, all transmitters 8 make reception simultaneously. A carrier detector 6 detects that a data is not transmitted on a transmission line 1 through a modulator 2 and a transmission controller 3, a time delay is provided only for the time set at each transmitter 8 and it is informed to a CPU4 during the time that no data is transmitted on the transmission line. Then the transmitter 8 generates right of transmission and informs to the other transmitters 8 that the right of transmission is generated. When the data transmission is finished, the right of transmission is given to the next transmitter 8. |
