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- 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。
- virtual frequency sweeper 虚拟扫频仪
- 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。
- Software subdivision and "virtual frequency conversion" technology were adopted in this solution, which realized multigrade, adaptive subdivided drive in operation of stepping motor. 该方法采用软件细分、“虚拟变频”技术,实现了步进电动机多档位、带电自适应细分驱动。
- 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
- 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。
- These children were in a state of virtual neglect. 这些孩子实际上处于无人照管的状态。
- 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
- A virtual state of war exist between the two countries. 这两国间实际上处於战争状态。
- Digital Realization Method of Frequency Sweep Signal 频率扫描信号的一种数字实现方法
- Our deputy manager is the virtual head of the business. 我们的副经理是公司的实际负责人。
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A virtual state of war exists between the two countries. 这两国间实际上处于战争状态。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位,等于每秒一周
- 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