| 摘要 |
PURPOSE:To attain the system constitution of economical digital transmission even at a remote location where a DCS clock distributor is not arranged by confirming the frequency division phase of a 1/M frequency division means by a signal generated from a synchronizing signal generating means. CONSTITUTION:Switching discrimination signals 205-1-205-N generated by a network signal interruption, out of frame synchronism, manual switch or power application prepared corresponding to network side signals 2-1, 2-1-2-N are inputted to a switching discrimination section 24. A synchronizing signal generating section 22 receiving a network frequency division signal 206 from a switching section 23 gives a reference signal 207 synchronously with a network side frequency-division signal 206 to a signal processing section 25, and the signal processing section 25 applies signal processing the base station side synchronously with the network. On the other hand, the output phases of frequency division sections 21-1, 21-2-21-N are confirmed by the timing signal 201 of the synchronizing signal generating section 22. Thus, the phase jump of the frequency-division signal 206 attended with the changeover of output signals 203-1, 203-2-203-N of each frequency division section by the changeover section 23 is minimized. |
