For the measurement of transmission loss of silencer with flow the rapid sine sweep and sync time averaging techniques are used to increase the signal-to-noise ratio and improve the measurement accuracy .

在有流情况下，应用快速正弦 扫 频和同步时域平均技术以提高信噪比，改善测量 结果 的 精度。

The rule is easy sweep range greatly yet the problem is that the machine system is the bad accuracy and the stability is harder domination and so on .

光机 扫描是用机械装置带动其反射系统 旋转以实现 激光 光束 的 扫描，其原理简单， 扫描范围大，但机械系统存在机构 精度差、稳定性较难控制等问题。

The analysis of dip sweep accuracy

倾角 扫描 的 精度分析

We should choose the suitable sweep signal and good test method to improve the precision and accuracy of frequency .

为提高 扫描过程中频率的精度和 准确 度需要选择合适的 扫描信号和检测方法。

To decrease the sweep interval or to sweep every other trace can help to raise the sweep accuracy .

减小扫描间隔或用隔道扫描的办法，可以提高 倾角 扫描 的 精度。

The paper simply introduces the working principle of measuring device and the measured results and discusses the influence of sweep interval on measuring accuracy .

简单介绍了测试装置工作原理和测试结果，并讨论了 扫描时间对测量 精度的影响。