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- A frequency sweeper with DDS chip AD9850 and a Philips microcontroller P89C51RC2 was designed. DDS扫频仪以菲力浦单片机P89C51RC2控制DDS芯片AD9850,用PC机显示扫频结果。
- LFM is one of widely used methods of ISAR.Nonlinearity in frequency sweep has some effects on the quality of imaging. 摘要线性调频法是逆合成孔径雷达(ISAR)成像中一种常用的方法，在该方法中扫频非线性对成像质量有一定的影响。
- The corresponding frequency of the key parts of the poplar particle presswood pallet at maximal transmissibility was determined by frequency sweep test. 摘要采用扫频试验得出振动台对托盘关键部位最大传递率所对应的频率。
- Frequency Sweep Meter and the Uses 扫频仪及其使用
- logarithmic frequency sweep rate 对数频率扫描速率
- broadband frequency sweep jamming 宽带扫频式干扰
- This paper introduced the design and development of a virtual frequency sweeper based on DDS technology.The DDS technology and the method to design the frequency sweeping generator were illustrated. 摘要介绍了基于DDS技术的虚拟扫频仪的硬件与软件设计，并详述了DDS技术以及用该技术实现扫频信号源的方法。
- The frequency response of undistorted transmitted system is introduced, and JH6170 electroacoustic testing system based on frequency sweeping method is analysed. 摘要介绍了无失真传输系统的频率响应特性，分析了基于扫频法测量系统频响的JH6170电声测试系统。
- The Realization of the Precise Frequency Sweep Signal Source 高精确度扫频信号源的实现
- Megasonic Cleaning with Frequency Sweep: Some Test Results 关于频率扫描兆声清洗技术的一些测试结果
- Digital Realization Method of Frequency Sweep Signal 频率扫描信号的一种数字实现方法
- He varied the transmission frequency. 他变换了无线电传送的频率。
- Design of a Novel Frequency Sweeper Using Direct Digital Synthesizer 新型直接数字合成式扫频仪的原理和研制
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- Small Amplitude Oscillation Frequency Sweep of Lamellar Liquid Crystal 层状液晶的小振幅振荡频率扫描研究
- Curve Simulation for Nonlinearity in Frequency Sweep in ISAR Imaging 对ISAR成像中扫频非线性的曲线拟合
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- frequency sweeping signal generator 扫频信号发生器
