| 摘要 |
PURPOSE:To increase the number of controlled units controlled by the remote supervision control system, which uses a plurality of transceivers of different frequencies and bandpath filters, by dividing the waves of the different frequencies into a certain number of groups and transmitting and receiving the waves in these groups on a time division basis. CONSTITUTION:Controlled units 11, 12, ..., IN are connected through transmission lines 501 and 502 to a supervising unit in a control station 1. In the control station 1 two mixer oscillators 41 and 42 are provided and connected to respective oscillators 31 to 3M and 3M + 1 to 3N. The outputs of the mixer oscillators 41 and 42 are coupled trough a switch 4 to the transmission line 501. The switch 4 alternatively couples the outputs of the mixer oscillators 41 and 42 to the transmission line 501. Receivers 101' to 10M' and 10M + 1 to 10N are connected through memory circuits 301 and 302 and receive the oscillator outputs on a time division basis in synchronism to the mixer oscillator outputs. |
