The noise factor analyzer's operation principle and the basic noise factor measurement method, Y factor method, are described. 本文提出了利用y因子法测量波导馈线小衰减的一种新方法,阐述了该方法的测量原理、方法和特点。
The result shows that the new NSA designed can perfectly meet the domestic demand of class 1 intelligent noise spectrum analyzer. 结果表明该仪器很好的满足了国内对于1型智能化噪声频谱分析仪的需要。
Noise sources of the CCD as the photoelectric detection device in an optical multichannel analyzer ( OMA) were analyzed, and noise suppression methods were discussed. 分析了光学多通道分析仪的光电探测器件CCD的噪声产生原因,讨论了抑制噪声、提高探测灵敏度的方法。
Octave filter is the most radical noise analyzer, whose analyzing result can reflect the energy distributing. 分数倍频程滤波器是最普遍、最基本的噪声分析仪器,它的分析结果能够反映噪声能量的频率分布情况。
Based on the analysis of the limitations of traditional design of the noise spectrum analyzer ( NSA), a new noise spectrum analyzer which adopted new techniques of the switch capacitance filter and digital demodulation was introduced. 指出了原有频谱分析仪的设计缺陷,提出了应用开关电容滤波技术、数字检波技术等最新技术而设计的新型噪声频谱分析仪。
Principle and Design of the New Noise Spectrum Analyzer 新型噪声频谱分析仪的原理与设计
Virtual Real-time Noise Octave Analyzer Based on FFT 基于FFT的虚拟实时噪声倍频程分析仪
Improving Spectral Property of Light Source to Increase Signal to Noise Ratio of Optical Multichannel Analyzer in Measurement of Absorbances 改善光源光谱特性提高光学多道分析器用于吸收光谱测量的信噪比
At last, it gives the applying example of noise analyzer based on intelligent control. 最后给出了智能控件化噪声分析仪的应用实例。
Decrease of Noise in Combustion by Using AVL Burning Analyzer AVL燃烧分析仪去除燃烧噪声的研究
Analysis of the Noise Factor Analyzer 噪声系数分析仪浅析
The Measurement of Phase Noise Based on Spectrum Analyzer and the Analysis of Uncertainty 基于频谱仪的相位噪声测试及不确定度分析
Finally, an example of noise removal is given to show the application of the signal analyzer. 最后以HHT去噪为例,介绍了基于HHT的非平稳信号分析仪的应用。
Digit Weight and Development of a Virtual Noise Analyzer 虚拟式噪声分析仪的数字计权与开发
The influence of noise on the analyzer output. 噪声对频率分析器输出的影响;
This paper mainly deals with this issue. It discusses a measurement method for phase noise using spectrum analyzer by doing experiment and analyses the test data using the theory of measurement uncertainty. 本文主要是通过实验来讨论用频谱分析来测量相位噪声的方法,并对其测量的结果,应用不确定度理论给出了相应的测量不确定度的分析。
This article introduces the principle and method how to measure phase noise with spectrum analyzer, and discusses the uncertainty factor and its evaluating method. 对基于频谱分析仪的相位噪声测试原理和方法进行了介绍,并对引起测试系统不确定度的因素及其评定方法进行了讨论。
The experiment shows that the harmonics spectrum analysis technology is not suitable for measurement the laser pulses which has the low jitter and high repetition rates since the bandwidth limit and the large internal noise of spectrum analyzer. 实验表明,谐波频谱技术由于受频谱仪内部噪声和测量带宽的限制不适合测量低抖动高重复频率的光脉冲。
Digit Weight and System Error Modification for Virtual Noise Analyzer 虚拟式噪声分析仪中的数字计权和系统误差修正
Quantitative calculations of intensity, phase and optical field noise spectra are presented for intensity-detection, phase-detection and optical spectrum analyzer applications. 基于H矩阵,定量计算了分别用于强度探测系统、相位探测系统和光谱仪测量的强度噪声谱、相位噪声谱和光场噪声谱。
Then the paper puts up the modeling and designing of functions of noise analyzer such as noise spectrum analysis, sound intensity and so on. 进行了噪声分析仪的噪声谱分析、声强分析等功能的建模和设计。
Comparation of the Noise Calibration in Spectrum Analyzer Spectral calibration; 频谱仪噪声检定比较谱线校准观测;
The Study and Fabrication of Noise Analyzer of Deflection Coil in TV Set 电视机偏转线圈噪声分析仪的研制
Through the process of spectrum analysis, two different frequency sine signals are added together and then added with the white noise. The result is input to the spectrum analyzer, the original signal is analysed. 频谱分析过程中,将两个不同频率的正弦信号叠加后再叠加上白噪声,通过虚拟频谱分析仪,可以有效的分析出原始信号。
Analysis of the Sensitivity and Study of Low Signal to Noise Ratios Measurement Accuracy on a Spectrum Analyzer 频谱仪灵敏度分析及低信噪比测量的精度研究
A new method to develop real time noise octave analyzer is suggested. 提出一种以快速傅里叶变换为基础的实时噪声倍频程分析仪构成方法。
Error correct formulae of low signal to noise ratios measurement are derived on a spectrum analyzer, the experiment results are reported to verify the correctness of theory calculation. 导出了频谱仪测量低信噪比时的误差修正公式,并用实验结果验证了理论计算的正确性。
Using the method, digit weight and digit system error modification for virtual noise octave analyzer can be realized. 利用这一方法,可以实现虚拟噪声分析仪的数字计权和数字式系统误差修正。
Through the integration, we have established a set of ultrasonic cavitation noise measuring apparatus composed of the ultrasonic generator, ultrasonic power meter, sensor, spectrum analyzer. 通过整合、改进,建立一套由超声发生器、超声功率计、水听器、频谱分析仪组成的测量超声空化效应噪声的装置。