The rotation angle approximately periodically changes the sub-beam signal amplitude and should be strictly controlled in the assembly to maximize the tracking signal amplitude.

计算结果表明：旋转误差使三光束法循迹信号的幅值近似呈周期性变化，它是在生产过程中需要严格控制的参数以保证循迹信号的幅值最大化；

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FSO is also secure: the only way to intercept the signal is physically to intercept the beam.

FSO更是安全可靠：能够拦截信号的唯一方法是对光束的物理隔断。

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The necessary shifts in signal phase are controlled via a dedicated beam steering controller or the architecture's central processor.

信号相位的必要相移通过专用波束调节控制器或集中安排的处理器进行控制。

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Without the country license, it's illegal to beam a signal to a customer in that country.

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And since fiber-optic cables are typically run right along with utility pipes--neither phone nor gas companies want to have their lines cut--it's easy to connect a fiber backbone to the gas pipes at the neighborhood level, and beam a signal the final few feet to each home.

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Jerry Levin was head of HBO and had the insight to beam up the signal via satellite so everyone could watch.

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