noise factor

From the rate and propagation equations describing Ytterbium-doped fiber amplifier system,the gain and noise figure are calculated,and the effect of pump power and device length on gain and noise is also discussed with 975nm pump wavelength.

对连续工作方式下掺Yb光纤放大器的增益与噪声特性进行理论研究,从描述掺Yb光纤放大器的速率方程与光传输方程出发,计算了掺Yb光纤放大器的增益与噪声指数,讨论在975nm泵浦光的作用下,泵浦功率、器件长度对放大器增益和噪声指数的影响。

The maximum effective noise figure (ENF) is -0.

信号经 60km的普通单模光纤传输后 ,平均开关增益为 1 6 5dB ,增益平坦度为 1 5dB ,最大等效噪声指数为 - 0 9dB 。

, the switch speed, extinction ratio, noise figure and dynamic range, of the SOA to be used as the gate, are analyzed.

对ＳＯＡ 作为开关中的选通门的四个性能参数即开关速度、消光比、噪声指数和动态范围作了分析，指出了改善各性能参数的途径。

Automatic gain control technique in microwave noise figure analysis;

微波噪声系数分析中自动增益调整技术

Noise figure measurement within high temperature superconductor mixer;

高温超导混频器噪声系数测量

The development of a special noise factor tester

一种专用噪声系数测试仪的研制

The noise factor analyzer’s operation principle and the basic noise factor measurement method, Y factor method, are described.

论述了噪声系数分析仪的工作原理和噪声系数最基本的测量方法——Y因子法。

After analyzing some factors influencing the receiver performance,for example,noise factor,frequency conversion loss,dynamic range,isolation degree,mixing distortion.

从混频器的基本概念出发,分析了混频器设计中的关键技术,如噪声系数、变频损耗、动态范围、隔离度、混频失真等对接收机性能的影响,并从工程角度出发,指出在工程设计中应注意的要点。

Method to reduce the uncertainty of noise coefficient measurement;

一种减小噪声系数测量不确定度的方法

Based on discussion and analysis of the noise coefficient of multilevel amplifier,an amplifier with low noise was introduced.

本文在对多级放大噪声系数理论分析讨论的基础上,介绍了一种低噪声μV信号放大器的设计与制作。

The way to reduce total noise coefficient is indicated for multiple amplifier.

本文用混合π型噪声模型 ,讨论了共发射极放大器的主要噪声来源 ,最佳源电阻和最小噪声系数 ,指出在多级放大器中降低总噪声系数的方向 ,设计出了一种低噪声偏置电路 。

The simulate transponder s key techniques such as NF,gain distribute,and EMC characteristics are analyzed in detail.

在介绍转发器的结构、特点的基础上,对转发器噪声系数、增益分配、电磁兼容等转发器设计中的关键问题进行分析,并给出某一采用一次变频体制方案的Ku波段模拟转发器的系统实现方法。

In band 935～960MHz,power gain isgreater than 16dB, the noise figure (NF) of the LNA is less than 2.

在935～960MHz频带内,LNA功率增益大于16dB,阻抗匹配系数S11小于-18dB,噪声系数(NF)小于2。

97dB,the noise figure(NF) is less than 2.

97dB,阻抗匹配系数S11小于18dB,噪声系数(NF)为2。

noise figure measuring set for microwave equipment

微波噪声指数测量仪

measuring set of noise figure of TWT

行波管噪声指数测量装置

The Parameters Identification Procedure for the Exponential Model with Additive Noise Apply in Oil Field

加性噪声指数模型的参数辨识方法及在油田上的应用

Traffic noise in this housing estate was assessed using Noise Impact Index (NII).

应用噪声冲击指数法对小区交通噪声进行总体评价 .

Noise Trading, H Exponent and the Efficiency of Exchange Market of China;

噪声交易、H指数与中国外汇市场效率研究

Lévy White Noises and Fractional Lévy Noises on Gel'fand Triple

Gel'fand三元组上的Lévy白噪声和分数Lévy噪声

Noise margin refers to the maximum noise voltage that can be added to the generated signal in a digital circuit before an undesirable change is caused in the circuit output.

噪声极限就是指可以加在数字电路的正常信号上，而又不对正常输出造成危害的最大噪声。

Estimation of Correlation Dimensions and Lyapunov Exponent of Typical Nonlinear Systems under the Bounded Noise Excitation;

有界噪声激励下典型非线性系统的关联维数和Lyapunov指数估计

(1) "Noise emission" means emission of noise from the source to the living environment of the neighbourhood.

（一）“噪声排放”是指噪声源向周围生活环境辐射噪声。

DBRN (Decibels above Reference Noise)

超过基准噪声的分贝数

Calculation of the Lyapunov exponent for low frequency noise in semiconductor laser and chaos indentification

半导体激光器低频噪声的Lyapunov指数计算和混沌状态判定

Singular Point Analyses of One-Dimensional Diffusion Processes and Maximal Lyapunov Exponents in Stochastic Bifurcation System

白噪声参激余维2分岔系统奇点分析及最大Lyapunov指数

decibels above reference noise

超出参考噪声分贝数;超过基准噪声的分贝数

Acoustics--Guidelines for the design of low-noise workplaces--Noise control strategies

GB/T17249.1-1998声学低噪声工作场所设计指南噪声控制规划

Acoustic Reflex Growth Function in Noise Induced Hearing Loss

噪声性听觉损害的声反射增长函数

Sonar array flow noise data acquisition based on TMS320VC5509A

基于TMS320VC5509A的声呐阵流噪声数据采集系统

randomly-modulated carrier

随机调制载波(一般指噪声调制的载波)

deaden (a sound or noise), esp. by wrapping.

尤指用包装使声音或噪音消失。