If the line of sight is obstructed, sometimes an alternate path can be established using an intermediate site as a repeater.
如果视距被阻挡，则可利用某一中间地点做为中继站，以建立一条迂回路径。
In digital repeater, the application of digital intermediate frequency technology and realization of optical fiber transmission for distance will require for little Phase Noise of Phase-Locked Source.
数字直放站采用数字中频处理技术方式并通过光纤实现远距离信号传输，此对系统中的锁相源的相位噪声提出了很高的要求。
In digital repeater, the application of digital intermediate frequency technology and realization of optical fiber transmission for distance will require for little Phase Noise of Phase-Locked Source.
数字直放站采用数字中频处理技术方式并通过光纤实现远距离信号传输，此对系统中的锁相源的相位噪声提出了很高的要求。
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