An in - circuit tester tests a digital ic using the ic ' s truth table 在线测试设备采用真值表来测试数字集成电路。
The first test an in - circuit tester performs is a shorts - and - opens test 在线测试完成的第一项测试任务就是短路、开路测试。
After performing the shorts and opens test , the in - circuit tester tests each component on a pcb assembly one at a time 在线测试完成的第一项测试任务就是短路、开路测试。
After performing the shorts and opens test , the in - circuit tester tests each component on a pcb assembly one at a time 短路、开路测试完成以后,在线测试仪需要在同一时间对印刷电路板上的每一个器件进行测试。
These testers cost less than in - circuit testers , and some manufacturers claim that tests run faster on mdas 这些测试设备所需要的费用要比在线测试设备少,而且有些制造商还宣称在生产缺陷分析设备上,测试速度进行的更快。
In - circuit testers can now also test for solder opens on surface - mounted devices ( smds ) , a common manufacturing defect on boards with smds 对于表面安装设备来说,焊接开路是一个很普遍的制造缺陷,在线测试设备可以将其测试出来。
For complex boards or boards that aren ' t tested with an in - circuit tester , most companies perform a functional test before final assembly 对于复杂的电路板或者没有经过在线测试的电路板而言,很多公司在最后装配之前进行功能测试。
Today , the test engineer has many more options , including in - circuit testers , manufacturing defects analyzers , and several types of functional testers 今天,测试工程师有很多选择,包括在线测试设备,制造缺陷分析设备和一些功能测试设备。
Because in - circuit testers and mdas test components individually , a pcb assembly can pass an in - circuit or mda test and still not function properly 在线测试和生产故障发现测试都是对器件单独进行测试,一块印刷电路板可以通过在线测试或生产缺陷测试,但是功能上还可能不是很完全。