The principle and main circuit design ideas are given for the mobile pulse output module tester.

介绍了便携式脉冲输出模块测试仪的原理和主要电路设计思想。

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Year 2000: ECT cell phone composite tester was brougt up, Dalian ECT entered mobile phone field.

2000年：东海数字手机综合维修系统面世，东海正式转入手机维修行业。

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The essay mainly expatiates the method to earphone of mobile telephone with SF200Learphone integration tester and the usual problems in the testing process.

本文主要阐述SF 200 L耳机综合测试仪检验手机耳机的方法，以及在检测过程中的要素问题。

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