论文完成基于DSP芯片的便携式叶片频率测试仪的硬件电路设计和电路板的制作，并完成对电路板的测试。
The portable blade frequency measurement instrument based on DSP is designed next. The DSP-based circuit board is made and the software program for testing hardware circuit board is coded.
驻极体传声器测试仪是用来测试传声器的灵敏度及频率响应的。
The electret microphone tester is used to test electret microphone's sensitivity and frequency response.
扫频仪也称频率特性测试仪，用于测试网络的幅频特性和相频特性，在现代电子测量中占有重要的位置。
The digital tester for frequency response characteristic, which is also called frequency-sweeping instrument, plays a very important role in modern electronic measurement.
本文介绍电液伺服阀频率特性的压差式测试原理及频率特性测试仪的硬软件结构、原理及特点。
This paper presents the principle, hardware structure, and features of a frequency characteristics instrument for electro-hydraulic servo valves.
本文提出了通过系统设计的方法将频率捷变雷达综合测试仪频率跟踪精度的检定在中频进行。
The system design method proposed by the paper examines the frequency tracking accuracy of the frequency agile radar synthesis detection unit at intermediate frequency.
频率捷变雷达综合测试仪工作在射频段捷变状态。
Frequency agile radar synthesis detection unit works in frequency hopping state in RF band.
这种方法克服了稳态电流测试方法测试频率低、瞬态电流测试方法对测试仪要求过高等问题，它能以电路的工作频率对电路进行测试，测试结果更准确，可以检测多种类型的故障。
By using it, the test can be done at the operation frequency of circuits under test, therefore results of the test can be more precise and this method can detect different types of faults.
这种方法克服了稳态电流测试方法测试频率低、瞬态电流测试方法对测试仪要求过高等问题，它能以电路的工作频率对电路进行测试，测试结果更准确，可以检测多种类型的故障。
By using it, the test can be done at the operation frequency of circuits under test, therefore results of the test can be more precise and this method can detect different types of faults.
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