对精密测试中常用的几种移相方法进行了讨论，主要浅析小角度电路移相方法。

In this paper, several phase shift methods generally used in accurate test and measurement are discussed. The minor angle circuit is superfacially analyzed mainly.

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首先，针对某型精密伺服转台系统中三块电路板（模拟控制板、单片机板和测角控制板）设计了专门的电路板测试仪。

First, a special instrument to test the analog-control board, single-chip board and angle-measure board in the high precision servo turntable system is designed.

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采用模拟回波和精密延时电路检测照射能力、用CCD采集激光光斑测试激光束散角，实现了整机性能的数字化检测。

Using simulation echo wave and accurate time delay circuit to measure ranging ability, using CCD to grasp laser facular to measure divergence of laser pulse, the digitized methods are realized.

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采用模拟回波和精密延时电路检测照射能力、用CCD采集激光光斑测试激光束散角，实现了整机性能的数字化检测。

Using simulation echo wave and accurate time delay circuit to measure ranging ability, using CCD to grasp laser facular to measure divergence of laser pulse, the digitized methods are realized.

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