介绍了一种时钟源选择控制方法，从而在SDH网络中各节点能自动选择最优时钟源，并实现时钟的同步。
A method of selecting the clock sources, which is used in SDH network to auto-select the best clock, is di-cussed.
我国自主开发的北斗卫星导航系统为同步相量测量的时钟源提供了一种新的选择。
The building up of Beidou navigation satellite system developed by China offers a new option of the time service for synchronization phasor measurement.
一旦选择了时钟源，可以有多种控制最终总线频率的选择。
Once you select the timing source, you have many options for controlling the final bus frequency.
在时钟产生电路中，选择了RC振荡电路作为系统提供时钟源的方案。
In clock generating circuit, we choose rc oscillation circuit as clock scheme to supply system clock source.
在时钟产生电路中，选择了RC振荡电路作为系统提供时钟源的方案。
In clock generating circuit, we choose rc oscillation circuit as clock scheme to supply system clock source.
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