A novel method of direct digital synthesizing frequency sweep signal is presented.
介绍了利用直接数字合成技术产生频率扫描信号的新方法。
A typical frequency sweep rheogram of nonionic surfactant liquid crystal can be observed at a moderate temperature range.
中等温度范围内表现出典型的非离子表面活性剂层状液晶的频率扫描曲线形式。
Advantages of the rapid frequency sweep technique for dynamic characteristics research of the linear system are also described.
特别对用快速正弦扫频试验方法研究线性系统动态特性的比点做了必要的说明。
The rapid frequency sweep technique and its basic principle have been introduced. Some examples of its practical application are given in the Paper.
本文简要介绍了快速正弦扫频试验技术及其使用的信号发生器的原理，并给出了典型应用实例。
A description is given, in particular, of the advantages of the rapid frequency sweep technique for the research on the dynamic characteristics of a linear system.
特别对用快速正弦扫频试验方法研究线性系统动态特性的优点做了必要的说明。
After the sequence passes through digital-to-analog converter and low pass filter, the desired frequency sweep signal is synthesized by the method of direct digital synthesis.
该序列通过数-模转换器和低通滤波器后，产生出频率扫描信号。
When using frequency sweep meter to measure the input impedance of antenna, the balanced - unbalanced transformer must be connected between coaxial transmission line and antenna.
用扫频仪测量天线的输入阻抗时，在同轴传输线与天线间应按平衡—不平衡变换器。
The epoxidized natural rubber was tested by temperature sweep, frequency sweep and strain sweep by using rubber process analyzer, and the results were compared with that of natural rubber.
用橡胶加工分析仪对环氧化天然橡胶进行了温度扫描、频率扫描和应变扫描，并和天然橡胶的响应曲线进行了对比。
Image processing method is used to carry out frequency sweep and voltage sweep measurement. The in-plane motion characteristic of MEMS is obtained and the testing results are analyzed and discussed.
利用图像处理方法对MEMS谐振器做扫频和扫压测量，获得了MEMS器件的平面微运动特性，并对测量结果进行了分析和讨论。
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。
In this paper several dynamic testing methods of electrohydraulic servo systems are introduced, including stochastic noise test, hammering test and sweep frequency test.
本文介绍电液伺服系统的几种动态测试方法，包括随机噪声测试，锤击法测试和扫频测试。
This paper discusses several methods of frequency marker generation and their applications in standard and non-standard sweep analyzers.
本文探讨标准和非标准扫频仪中的几种频率标志的形成方法和适用场合。
All the conventional vibrators use the sweep signal of which the instantaneous frequency shows linear change with time.
常规可控震源都是采用瞬时频率随时间线性变化的扫描信号。
The direct digital synthesizer (DDS) is used to sweep frequency for a sandwich piezoelectric transducer two admittance circles of the transducer about two different resonance frequencies is measured.
利用直接数字合成器(DDS)对夹心式换能器进行扫频，测得两个不同共振频率附近的导纳圆。
Objective To investigate the effect of spatial and temporal frequency on the Sweep pattern visual evoked response acuity (SPVER-A).
目的研究时间频率和空间频率对扫描图像翻转诱发电位视力准确度的影响。
The method of digit fast sine sweep frequency is used in nonlinear suspention system frequency feature numerical solution.
本文针对非线性悬架，研究通过数字快速正弦扫频获得其频域特性的数值解的方法。
Start frequency, stop frequency and sweep time of the signal synthesized by the method can be preset freely and controlled accurately.
被合成的频率扫描信号的起始频率、终止频率和扫描时间可根据需要随意设定，并且可以实现对三者的精确控制。
Wireless Sweep: frequency detection range (1mhz-605ghz).
无线扫频：频率侦测范围(1M HZ- 605ghz)。
Fitting operating frequency of Xinsai line high-frequency channel is decided through sweep checking of the channel.
通过对新赛线高频通道进行扫频试验，选择适合该高频通道的工作频率，有效地减小了该高频通道的衰耗。
This paper analyzes the reason why the FMCW signal determined with high sweep repetition frequency (HSRF) generates high range sidelobes in deramping processing.
本文分析了高扫频重复频率的确定截断FMCW信号在去斜率方式下处理高速运动目标时产生较高的距离旁瓣的主要原因。
While the alterable frequency and scope sawtooth sweep signal for TFFP can neatly change the scanning range of the system, which is more improved the demodulation speed.
同时变频变幅的TFFP锯齿波扫描信号可以灵活地改变系统的扫描范围，进一步提高了系统的解调速度。
The testing error and the reason of error are analyzed, compared with the results received by the sweep-frequency measurement method.
将微悬臂梁和微薄膜振动特性的测量结果与频率扫描法的测试结果进行了比对，对产生的误差及误差来源进行了分析。
Running a frequency-sweep using a list of predefined frequencies added.
运行频率扫描频率使用预定义的补充清单。
The excellence of portable high-frequency vibroseis (PHV) mainly lies in high-resolution and free choice of sweep frequencies.
可控震源具有分辨率高、频率范围选择自由、能量频谱有一定可控性等优点。
Display 2D far field patterns for frequency-sweep.
模式的频率，二维扫描显示远场。
Display 2D far field patterns for frequency-sweep.
模式的频率，二维扫描显示远场。
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