wave-exciting device

Comparing with other search methods, a technique for the rapid acquisition of a direct spread-spectrum signal using Surface Acoustic Wave Device ( SAWD) has many advantages.

在实现快速同步的方法中，使用声表面波（SAW）卷积器实现PN码序列的捕获跟踪，与其它方法相比，具有多方面的优势。

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The analog Phase Locked Loop has high sensitivity and low measurement error, so it is widely used in the receiver of such equipment as interferometer, continuous-wave radar, telemetering device, etc. However, it has the problem of track stability.

模拟锁相环灵敏度高、测量误差小，因而大量地应用于干涉仪、连续波雷达、遥测等设备接收机中，但其存在环路跟踪稳定性的问题。

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To ensure the accuracy of the measured data in the test, based on the analysis of the specific stress wave propagation features of the device, standardized calibration procedures before test were proposed and applied in this experiment. ( 2) Verification of the test effectiveness.

为保证试验精度，在对该装置特有的应力波传播特点进行理论研究的基础上，提出了试验前规范性的校正步骤，并应用于本次试验。（2）试验有效性的验证。

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Higher-order Harmonic Wave ′ s Damage to Self-compensating Device for Low-voltage Reactive Power and its Preventive Measure

高次谐波对低压无功功率自动补偿装置的危害及预防措施

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The Design of Simple Experimental Device for Tensile Impact Strain Wave

冲击拉伸应变波简易实验装置结构设计

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