其中一项电气测试就是测量元件的时序，要进行这项测试，必须使用 时间测量单元(Time Measurement Unit， TMU)。 TMU是一种半导体自动测试设备(ATE)，负责测量两次事件之间的间隔时间或计算事件的个数。
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相量测量单元(PMU)相量数据有效性的关键在于时间同步。
The key of the data validity of the phasor measurement unit (PMU) is the synchronization.
应力波经过两端所用时间可用微秒时间间隔测量单元测得。
The signals are amplified so that the time interval between them can be measured with a micro-second time interval measurement unit.
观测时间是保持质量测量单元(734)所测得的通信质量的预定测量准确度所需要的时间。
The observation time is the time period, which is required for that the communication quality to be measured by the quality measurement unit (734) is kept at a set measurement precision.
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