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qualnet网络仿真软件的学习和实例
qualnet是一款网络仿真软件，本文档描述了其安装和使用方法，并列举了实例。
- 2020-12-05下载
- 积分：1
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Rohde&Schwarz 频谱仪操作手册（英文）
Rohde&Schwarz 频谱仪操作手册（英文） 1145.5850系列全英文，详细的操作方式，各类使用技巧R&S FSHContentsContentsSpecificationsSafety InstructionsCertificate of qualitEC-Certificate of conformitySupport Center AddressList of R&S RepresentativesPutting into OperationFront view1.1Putting into Operation1.2Unpacking the Instrument1.2Setting up the InstrumentSwitching on the Spectrum Analyzer1.4Spectrum Analyzer Connectors1.5Screen SettingsQCountry-Specific Settings1.10Setting the Date and TimeSetting the date.1.11Setting the time1.1Charging the Battery......1.12Selecting the Instrument Default Setup1.13External Reference /External Trigger Switchover1.14Controlling the rF Attenuator1.15Using a Preamplifier…1.15PIN Entr1.17Connecting Printers.1.19Setting the Baud rate for Remote Control1.21Enabling Options1.21Checking the Installed options1.221145.5973.12E-15ContentsR&S FSH2 Getting Started2.Measurements on cw signals2.1Level measurement2Setting the Reference Level量‘面2.2Frequency Measurements2.3Harmonic Measurements of a sinewave Signal面面2.4Power Measurements Using the Power Sensor2.5Power and return loss measurements with the r&s FsH-z14 or the r&s FSH-Z444427Two-Port Transmission measurements2.9Measurement of return loss2.11Performing Distance-To-Fault Measurements...2.14Operation in Receiver Mode2.20Measuring the carrier-to-Noise power ratio2.Determining the Reference2.26Sts…2.26Selecting the reference channel2.27Entering the channel bandwidth of the reference channel2.27Selecting the unit for the reference...2.27Manually entering the reference2.27Automatic level adjustment2.27Measuring the Noise Power and Calculating Carrier Power /Noise Power.........2.28Selecting the result display2.28Frequency setting of the noise channel..2.28Setting the noise channel measurement bandwidth2.29Setting the C/N channel bandwidth2.29Automatic level adjustment2.29Correcting the displayed average noise level2.30Hiding the result display2.30Saving and Recalling Settings and Test Results2.31Saving Measurement Results2.31Saving Calibration Data2.32Recalling measurement results2.33Printing Out Measurement Results……2.341145.5973.122E-15R&S FSHContents3 Operation3.Screen LayoutScreen layout for spectrum-mode measurements without markers3.1Screen layout when the marker mode is selected3.2Entering Measurement ParametersEntering values and texts3.3Entering units3.4Menu overview.3.5Frequency entryFrequency span...Level setting…3.5Bandwidth settingTrace setting3.6Measurement functions3.7Marke3.10Save and print menu3.12Instrument setup3.12Status display3.12Menus in the Receiver Mode(option R&S FSH-K3)3.13Menu for 3GPP BTS Code domain Power Measurement (Option R&S FSH-K4)3.16Menu for Vector Voltmeter(Option R&S FSH-K2)3.161145.5973.12E-15ContentsR&S FSH4 Instrument functions4Instrument Default Setup4.1Status Display..................4.1Setting the Frequency4.2Entering the center frequency..4.2Setting a frequency offset4.2Entering the center-frequency step size4.3Entering the start and stop frequency4.4Working with channel tablesSetting the Span1面4.6Setting the Amplitude Parameters4.7Setting the reference levelEntering the display range94.9Entering the display unit4.9Entering the reference offset4.10Entering the input impedance.…………4.10Setting the Bandwidths4.11Resolution bandwidth4.11Video bandwidth4.13Setting the Sweep4.14Sweep time.4.15Sweep mode.4.15Trigger4.16Trace Settings4.19Trace mode∴4.19Detector4.20Trace memory…4.22Trace mathematics4.23Using the Markers4.24Automatic marker positioning .......4.25Using more than one marker at a time(multimarker mode).........,4.27Marker functions4.30Measuring the noise power density4.30Measuring the frequency4.31Measuring the filter bandwidth or the signal bandwidth4.32aF demodulation4.331145.5973.12E-15R&S FSHContentsUsing the dis play line…….….….….….….….….….…..….….……….…..34Setting and Using the Measurement Functions4.35Measuring the channel power of continuously modulated signals………………4.35Selecting the standard4.36Setting the reference level4.38Setting the channel bandwidth4.38Changing the spaPower displaPower measurements on TDMA signals4.42Selecting a standard∴4.42Setting the measurement time4.44Optimizing the reference level ..4.44Power readout4.45Setting the trigger4.45Measuring the occupied bandwidth4.46Selecting a standard4.47Setting the reference level4.48Setting the channel bandwidth4.49Entering the power percent to determine the occupied bandwidth4.50Displaying thupied bandwidth4.50Changing the spai1145.5973.12E-15ContentsR&S FSHMeasuring the Carrier-to-Noise Ratio.......4.52Determining the reference4.53Setting the reference channel4.53Setting the reference channel bandwidth……4.53Setting the analyzer reference level for the reference channel measurement4.54Manual reference mode4.54Inserting the c/N referenceUnits of the c/n reference4.55StandardsUSER Standard4.56User-specific standards4.56Predefined user-specific standards4.59Predefined user-specific standard Digital TX4.59Predefined user-specific standard ANalog tv mode4.60Predefined user-specific standard ctx4.60Measuring the noise channel power and calculating the carrier power/noise power.4.62Frequency setting of the noise channel………4.63Setting the noise channel bandwidth4.64Setting the C/N ratio channel bandwidth4.64Setting the reference level during noise channel measurement.4.65Selecting the c/ N result display..…,…4.65C/N measurement result display4.66Changing the span4.66Correction of inherent noise power4.67Using the R&S FSH in receiver mode4.68Setting the frequencySetting the reference level,,,。.。4.71Setting the bandwidth4.72Setting the detector4.73Setting the measurement time4.73Measurement on multiple frequencies or channels(scan)4.74Measurements using the power sensor4.76Connecting the power sensor……4.76Zeroing the power sensor.4.78Selecting the unit for the power readout4.79Setting the averaging time.……4.80Taking additional loss or gain into account4.81Measuring forward and reflected power∴4.82Zeroing the power sensor4.84Setting the power measurement weighting4.85Selecting the unit for the power readout4.86Taking additional attenuation into account4.881145.5973.126E-15R&S FSHContentsTwo-port measurements with the tracking generator489Measuring the transmission of two-ports4.91Vector transmission measurement494Measuring the transmission magnitude........4.96Measuring the transmission phase4.96Measuring the electrical length when measuring transmission面B国4.99Measuring the group delay when measuring transmission4.100Transmission measurement using the connected VSWR Bridge R&S FSH-Z3.. 4.102Sppectrum measurements with the VsWR Bridge R&s FSH-Z3 or R&S FSH-Z2connectedSetting for detecting the R&S FSH-Z3 in the transm. and spectr. measurement .. 4.104Supplying DC voltage to active DUTs4.105Reflection measurements4.105Scalar measurement of reflection4.106Vector measurement of reflection4.108Measuring the reflection magnitude4.111Measuring the reflection phase.……4.111Measuring the electrical length when measuring reflection4.112Displaying the reflection in the Smith chart4.113Measuring the group delay when measuring reflection4.118Selecting the calibration standards4.120Spectrum measurements with the vswr Bridge r&s FSH-Z3 or R&S FSH-z2connected4.121Settings for detection of the R&SFSH-z2andR&SFSH-Z3………4.122One-Port measurement of cable loss4.123Vector voltmeter.4.124Reflection measurements(S11)4.125Measuring transmission coefficients(S21)4.128Cable measurements4.134Cable selection∴4.135Selecting the frequency range…4.138Calibrating the test setupa.::::::.“14.139Locating cable faults by means of the marker function4.142Measuring spectrum and reflection4.145Further information∴4.146Setting the span4.146Selecting the center frequency.........∴4.147Measurement4.148Length measurement accuracy4.148Using limit Lines∴4.149Measurements with limit lines国面面4.151Definition range of limit lines4.152Data sets containing limit lines...4.1521145.5973.127ContentsR&S FSHMeasuring with Transducer Factors.4.153Unit for measurements with transducers4.156Reference level settings for measurements with transducers4.156Frequency range of transducer………4.156Data sets containing transducer factors4.156Field-Strength Measurement with Isotropic Antenna∴4.157Connecting the antenna to the R&S FSH4.157Measurement of the resultant field strength in a transm. channel with large bandwidth .......4.159Code Domain Power Measurement on 3GPP FDD Signals.4.166Saving and Loading Instrument Settings and Measurement Results4.173Saving results4.174Entering a data set name4.175Loading measurement results.4.175Deleting saved data sets4.176Deleting all data sets4.177Printing out Measurement Results4.178Measurements4.179How a spectrum analyzer operates…4.1791145.5973.12E-15
- 2020-12-10下载
- 积分：1
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axure 框架图模板设计.rp
axure 框架图模板设计
- 2021-05-06下载
- 积分：1
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直角坐标系下的牛顿拉夫逊潮流计算MATLAB程序
在直角坐标系下进行常规潮流计算含有数据文件及数据文件说明
- 2021-05-06下载
- 积分：1
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元器件基础知识大全.pdf
电子元器件基础知识（1）——电阻 导电体对电流的阻碍作用称为电阻，用符号 R 表示，单位为欧姆、千欧、兆欧，分别用Ω、KΩ、MΩ表示。一、电阻的型号命名方 法： 国产电阻器的型号由四部分组成（不适用敏感电阻） 第一部分：主称 ，用字母表示，表示产品的名字。如 R 表示电阻，W 表示电位器。 第二部分：材料 ，用字母表示，表示电阻体用什么材料组成，T-碳膜、H-合成碳膜、S-有机实心、N-无机实心、J-金属膜、Y-氮 化膜、C-沉积膜、I-玻璃釉膜、X-线绕。11 第三部分：分类，一般用数字表示，个别类型用字母表示，表示产品属于什么类型。1-普通、2-普通、3-超高频 、4-高阻、5-高温、 6-精密、7-精密、8-高压、9-特殊、G-高功率、T-可调。 第四部分:序号，用数字表示，表示同类产品中不同品种，以区分产品的外型尺寸和性能指标等 例如：R T 1 1 型普通碳膜电阻 二、电阻器的分类 1、线绕电阻器：通用线绕电阻器、精密线绕电阻器、大功率线绕电阻器、高频线绕电阻器。 2、薄膜电阻器：碳膜电阻器、合成碳膜电阻器、金属膜电阻器、金属氧化膜电阻器、化学沉积膜电阻器、玻璃釉膜电阻器、金属 氮化膜电阻器。 3、实心电阻器：无机合成实心碳质电阻器、有机合成实心碳质电阻器。 4、敏感电阻器：压敏电阻器、热敏电阻器、光敏电阻器、力敏电阻器、气敏电阻器、湿敏电阻器。 三、主要特性参数 1、标称阻值：电阻器上面所标示的阻值。 2、允许误差：标称阻值与实际阻值的差值跟标称阻值之比的百分数称阻值偏差，它表示电阻器的精度。允许误差与精度等级对应 关系如下：±0.5%-0.05、±1%-0.1(或 00)、±2%-0.2(或 0)、±5%-Ⅰ级、±10%-Ⅱ级、±20%-Ⅲ级 3、额定功率：在正常的大气压力 90-106.6KPa 及环境温度为－55℃～＋70℃的条件下，电阻器长期工作所允许耗散的最大功率。 线绕电阻器额定功率系列为（W）：1/20、1/8、1/4、1/2、1、2、4、8、10、16、25、40、50、75、100、150、250、500 非线绕电阻器额定功率系列为（W）：1/20、1/8、1/4、1/2、1、2、5、10、25、50、100 4、额定电压：由阻值和额定功率换算出的电压。 5、最高工作电压：允许的最大连续工作电压。在低气压工作时，最高工作电压较低。 6、温度系数：温度每变化 1℃所引起的电阻值的相对变化。温度系数越小，电阻的稳定性越好。阻值随温度升高而增大的为正温 度系数，反之为负温度系数。 7、老化系数：电阻器在额定功率长期负荷下，阻值相对变化的百分数，它是表示电阻器寿命长短的参数。 8、电压系数：在规定的电压范围内，电压每变化 1 伏，电阻器的相对变化量。 9、噪声：产生于电阻器中的一种不规则的电压起伏，包括热噪声和电流噪声两部分，热噪声是由于导体内部不规则的电子自由运 动，使导体任意两点的电压不规则变化。
- 2021-05-07下载
- 积分：1
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线性代数及其应用Linear algebra and its applications David Addison-Wesley...
【实例简介】David C.Lay的英文版的线性代数及其应用Linear algebra and its applications
- 2021-12-12 00:36:51下载
- 积分：1
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正态分布模式下的贝叶斯分类
用MatLab编写的正态分布模式下的贝叶斯分类器。很多模式识别的课设就有相关题目。不仅有样本分类而且会在二维坐标系下画出，正确分类与错误分类的点都会有不同的标志。
- 2020-12-08下载
- 积分：1
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UPS中的逆变电路
逆变电路是UPS电源的核心电路。作者在剖析若干知名厂家生产的UPS电源电路的基础上，对UPS电源中的逆变电路进行了探讨。本文所涉及的电路，是这些厂家技术人员多年技术经验的结晶，并且经历过大量产品投放市场后的考验，具有很好的参考价值。作者在此发表出来，供业内人士和有兴趣者参考。 UPS电源有很多分类，作者根据业内的习惯，将UPS电源分为工频机和高频机。本文中的工频机和高频机采用的都是正弦波逆变电路，输出的都是正弦波电压，并且都是在线式结构。文中只涉及正弦波逆变电路，以下简称逆变电路。
- 2020-12-01下载
- 积分：1
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OFDM-MIMO（MATLAB）
使用matlba实现OFDM-MIMO，里面有完整的代码和一本详细的讲解如何用matlab仿真的书
- 2020-12-10下载
- 积分：1
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java基于MySQL的学生管理系统
java源程序实现了基于MySQL的学生管理系统支持增删改查操作
- 2020-12-08下载
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