This article proposes with designs frequency meter's method based on at89C51 monolithic integrated circuit to be possible to obtain the precision to be high, the frequency range wide frequency meter.

本文提出的用基于AT 89 C 51单片机设计频率计的方法可获得精度较高、频率范围宽的频率计。

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JW3201 Single Channel Benchtop Power Meter is a test instrument with high precision and wide measurement range.

JW3201单通道台式光功率计是嘉慧公司开发设计的高精度、宽量程光功率检测设备。

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"They literally charge by the minute, and when the meter is running they can perform a wide range of tasks, " Mr. Neary says.

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