| 摘要 |
PURPOSE:To eliminate the need for a line from a slave station to a reference station by sending only the error from the normal timing of a burst from the slave station as phase information by the reference station and allowing the slave station to control the timing of the sent burst. CONSTITUTION:Position error measuring circuits 11, 21 of the reference stations 1, 2 detect the lead/delay of the timing of a burst unique word sent from the slave station 3 from the normal timing and output the result as error information signals 101, 201. The slave station 3 applies the input information 101, 201 to a selection circuit 31. When the reference station 1 is a master station and the reference station 2 is a substation and the signal 101 is received normally, the result is outputted as an error information signal 301 via the circuit 31. The signal 301 is integrated by a loop comprising an adder 32 and a delay circuit 33, outputted as a position information signal 302 to control the timing of sent burst into the normal timing. Further, when the signal 101 is not received normally, the circuit 31 selects the signal 201. |
