With triax cable, the inner shield can be driven at guard potential in order to reduce cable leakage and minimize circuit rise times.

使用三同轴电缆时，为了减少电缆泄漏并尽量降低电路的上升时间，可以将内层屏蔽驱动到保护电位。

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This paper introduces a method how to do a guard against theft and alarm system of cable, using 555 integrate circuit and MCS - 51 MCU.

本文介绍了一种使用单片机和555集成电路制作电缆报警器的方法。

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