Electrical testers are widely used, but they are facing challenges from high-density PCB assemblers and very high frequency boards' testing tasks.

但是，电气测试仪将面临高密度pcb和甚高频电路测试的挑战。

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By contacting with PCB, electrical testers, such as in-circuit tester, not only can test most of manufacturing defects and faults, but also can test PCB assemblers' electrical performance.

以电气接触为手段、以在线测试仪为代表的电气测试仪除了能够测试制造过程的缺陷和故障以外，还能够测试pcb的某些电气性能，因而得到了广泛的应用。

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