Signal frequency range is also adjustable according to requirements.
信号频率幅度也按要求可调。
A method of measuring TD-SCDMA signal frequency error based on virtual instrument is proposed.
提出了一种基于虚拟仪器的精确测量TD - SCDMA信号频率误差的方法，并给出了系统设计。
The DDS signal generator which can adjust signal phase, signal frequency and complex wave is designed.
最终实现频率、相位、复合波形皆可调节的直接数字合成的信号发生器。
To ensure proper operation, the device must be reset after reference signal frequency changes and power-up.
为了确保正确操作，设备必须重置后参考信号频率的变化和电。
If the signal frequency to be measured is low, wide strobe gate is required for high measurement precision.
当被测信号频率较低时，需要很宽的选通门才能得到较高的测量精度。
Noise in signal was expressed by the partial mode, and signal frequency component was reflected by other modes.
模态中的一部分表示了信号中的噪声，而剩下的部分模态真实反映了信号的频率成分。
The accuracy and the stability of signal frequency are very important performance indication in the transmitter.
频率的准确度和稳定度是发射机的一个重要性能指标。
Cross Well seismic signal frequency is usually several times of the surface seismic or more, can reach hundreds of Hertz.
井间地震信号的主频通常是地面地震的数倍甚至更高，可以达到几百赫兹。
The digital frequency meter is a device which is one kind of using decimal system digital directly display the signal frequency.
数字频率计是直接用十进制数字显示被测信号频率的一种测量装置。
The principle and methods to reduce the spectrum leakage by synchronizing the data sampling with the signal frequency was too given.
然后讨论了利用同步采样消除谱泄漏的原理与方法；
A digital signal processing way is established to obtain ultrasonic signal frequency shift in the test of high sand content fluid flow.
笔者采用数字手段去测取超声波信号的频差，通过频差法可得出流体的平均速度，进而获得高含沙量流体的流量。
By the debugging, the coding of speech is realized; m sequence is produced. Moreover, the spread of signal frequency spectrum is realized.
通过调试实现了语音的编码、产生了m序列，并实现了信号频谱的扩展。
By means of this technique, the signal frequency can been controlled with facility, accuracy, continuous phase and fine frequency resolution.
利用这种技术可以方便的实现高精度、连续相位、高分辨率的频率控制。
With increasing of signal frequency in digital circuit, signal integrity (si), especially, signal reflections become more and more important.
随着数字电路信号速度的提高，信号完整性，尤其是信号反射的影响也愈加突出。
Signal sequence DFT is a signal frequency spectrum sampling sets, therefore DFT can be directly used for analysis of signals frequency spectrum.
信号序列的DFT本身就是信号频谱的采样集，所以DFT可直接用于分析信号的频谱。
In wideband auto-correlation receiver, signal after self-mixing is sine signal. A synthetic algorithm is proposed for sine signal frequency estimation.
在宽带自相关接收机中，自混频后的信号为正弦信号，本文提出了一种综合算法估计正弦信号的频率。
The present invention discloses method and apparatus of microwave signal frequency transformation based on optical fiber stimulated Brillouin scattering.
本发明公开了一种基于光纤受激布里渊散射的微波信号频率变换方法及装置。
The DPLFM has a high speed of tracking signal frequency and high precision, and also can predict and compensate the change of the input signal frequency.
该电路频率跟踪速度快，精度高，并能对输入信号的频率变化进行预测和补偿。
The method consists of real-time estimation of signal frequency, synchronous tracking of sampling frequency and error correction of harmonic coefficients.
该方法包括信号频率实时估计、采样频率同步跟踪和谐波系数误差校正几个要素。
The experiment should be done again to investigate the regular stimulation and clear relationship between stimulation strength and the signal frequency change.
为了得到有规律的刺激和刺激强度与神经放电频率的关系还需要一步的实验。
The results indicate that the atmospheric gravity admittances are reduced with the increase of the signal frequency and may contain the inverse barometric effect.
结果表明，气压重力导纳值随信号频率增加呈明显的下降趋势，可能存在“反变气压计”效应，而温度重力的影响主要集中在长周期频段。
The simulation result also confirms that this method has the better SNR of output signal than DDS, and higher output signal frequency than direct CORDIC algorithm.
结果表明：在消耗同样多硬件资源产生正弦信号时，采用该方法可以比采用DDS技术获得更好的输出信号信噪比，比采用直接CORDIC算法获得更高的输出信号频。
An adaptive notch filtering method is proposed for computing the output signal frequency of vortex flowmeters, and the experimental results are given in this paper.
本文提出采用自适应陷波方法计算涡街流量计输出信号的频率，并给出实验结果。
The use of phase-locked loop technology makes the sampling frequency synchronously follow the signal frequency and improves the calculation accuracy of sampling data.
运用锁相环技术使采样频率同步跟踪信号频率，提高采样数据计算的准确性。
The heterodyne detection is used to detect the output signal frequency difference between the reference arm and sensing arm, which is caused by the temperature variation.
外差探测用来探测传感臂和参考臂由于温度变化引起的输出信号的频率差异。
To estimate signal frequency and amplitude exactly under noisy circumstances, the excellent property of all-phase DFT restraining spectral leakage is mathematically proved.
为精确估计噪声环境中的信号频率和幅值，数学证明了全相位DFT优良的抑制频谱泄漏的性质。
The Nyquist law is applied to all the conventional compression coding algorithms, which prescribes that the sampling rate must be at least as twice as the signal frequency.
在传统的压缩编码技术中，采样均遵循奈奎斯特定律，该定律规定采样速率要高于原信号频率的两倍。
With the signal frequency known, the filter with a given frequency delay is designed for an image target detection. The experiment proves that the filtering effect is good.
实验证明，将这一结论推广运用于空域中，对已知频率的信号，设计特定频率延迟的滤波器应用于图像目标检测，效果良好。
The modulation domain measurement technique is presented simply. The application of modulation domain analyzer in the complicated signal frequency measurement analysis is probed.
对调制域测量技术作了简要介绍，探讨了调制域分析仪在复杂信号频率测量分析上的一些应用。
The modulation domain measurement technique is presented simply. The application of modulation domain analyzer in the complicated signal frequency measurement analysis is probed.
对调制域测量技术作了简要介绍，探讨了调制域分析仪在复杂信号频率测量分析上的一些应用。
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