IQview 使用說明

1、IQview 使用說明使用說明名詞解釋名詞解釋EVMError vector Magnitude(誤差向量幅度)PSDPower Spectrum Density(能量頻譜密度能量頻譜密度)CCDFComplementary Cumulative Distribution Function(互補累積分佈函數(shù))Spectral Flatness頻譜平整LO(DC) Leakage本地振盪洩漏Phase Noise相位雜訊Phase Error相位誤差Frequency error頻率誤差名詞解釋名詞解釋OFDM正交頻分多路復(fù)用DSSSDirect Sequence Spread Spectrum

2、(直接序列展頻)Symbol sequence符元序列IQview簡介簡介lIQview 為專為IEEE 802.11 a/b/g/n的綜合測試儀，它是以雙頻段實體層之測試而設(shè)計，整合了VSG(Vector Signal Generator)和VSA(Vector Signal Analysis)的多功能測試儀。完整的GUI操作分析功能可提供快速而清楚的實驗數(shù)據(jù)。l注意點:802.11n的測試需要搭配軟體升級，否則無法量測IQview安裝與設(shè)定安裝與設(shè)定lPC機系統(tǒng)要求機系統(tǒng)要求lWindows 2000 或 XP操作系統(tǒng), 光驅(qū), Ethernet 10/100網(wǎng)卡l顯示器分辨率: 不小于1

3、024 x 768IQview安裝與設(shè)定安裝與設(shè)定l開機開機l1. 將IQview通過Ethernet纜線(交叉型)與PC機相連. （如右圖所示）l2. 按下IQview儀器上的電源按紐.l電源指示燈先發(fā)紅光, 等儀器啟動完畢後便變?yōu)榫G色.l注意: 啟動約需30-45秒鐘.DUTPCIQVIEW 網(wǎng)線CableIQview安裝與設(shè)定安裝與設(shè)定l IP位址設(shè)定位址設(shè)定l為確保與IQview通訊正常, PC機的IP位址和子網(wǎng)掩碼設(shè)置需與IQview的IP位址和子網(wǎng)掩碼相匹配.l1. 右鍵單繫 網(wǎng)路上的芳鄰網(wǎng)路上的芳鄰 , 在菜單中選取 內(nèi)容內(nèi)容l2. 右鍵單繫區(qū)域連線區(qū)域連線，在菜單中選取內(nèi)容內(nèi)容

4、l3. 雙繫internet protocol(TCP/IP)l4. 選中 使用下面的使用下面的IP位址位址 前面的單選框, 然後輸入IP位址: 192.168.100.X, 其中X是1到253之間的任意一個整數(shù)(IQview的該位址是254)l5. 在 子網(wǎng)掩碼子網(wǎng)掩碼 一欄中輸入255.255.0.0l點繫 確定確定 , 便完成設(shè)置 IQview安裝與設(shè)定安裝與設(shè)定l安裝安裝IQsignal 802.11 Tester測試軟件測試軟件l 插入 IQview Applications CD-ROM 光盤, 窗口會出現(xiàn)安裝畫面l 按照提示完成安裝 l 安裝完成後, 點繫 關(guān)閉關(guān)閉l 如果安裝成

5、功候，桌面會出現(xiàn)三個IQview測試用軟體Hardware DescriptionvFront PanelHardware DescriptionlRear panel10/100 Ethernet10MHz ReferenceUSB電源接口Power on/offSoftware operation-IQ SignallIQ Signal主要是為了測量分析802.11a/b/g中一些複雜訊號的EVM，Power, spectrum Mask等參數(shù)而設(shè)計開發(fā)的軟體l注現(xiàn)在我們廠內(nèi)一般都只用來測量EVM值，其他測量則很少用到. Software operation-IQ SignallIQ Si

6、gnal主界面主界面Software operation-IQ SignallIQ Signal主界面主界面-功能鍵介紹功能鍵介紹Software operation-IQ SignallIQ Signal主界面主界面-功能鍵介紹功能鍵介紹FeatureDescriptionRF channelRF channel selectionMax Sig. LevelThe specified level should be greater than or equal to the peak level of the signalExternal AttnExternal gain settingT

7、rigger SettingsThree different options can be selected here: Free run, external trigger input, and signal trigger inputRF inputWhen selected, the signal must be supplied to the RF input port. If not selected, the signal must be supplied to the base band inputs.Software operation-IQ SignallIQ Signal主

8、界面主界面-功能鍵介紹功能鍵介紹FeatureDescriptionMeasurement WindowDisplays measurement results in this window.Power Time GraphThis window displays a graphical representation of the measured data. The blue trace represents the peak amplitude value, while the red trace represents the amplitude as a moving average o

9、ver 40 samples.Display Packet InformationIf Display Packet Information is checked, a window inside the top measurement window will display a summary of the packet being analyzed.Note, the data is only displayed when an EVM analysis is performedSoftware operation-IQ SignallIQ Signal主界面-功能畫面lTop-left測

10、量畫面Software operation-IQ SignallIQ Signal主界面-功能畫面lLeft測量界面Software operation-IQ SignallIQ Signal主界面-功能畫面lRight測量界面Software operation-IQ SignallIQ Signal主界面-功能畫面lTop-Right測量界面Software operation-IQ SignallMain MenuFile Menul主菜單主要包含以下幾項l Filel Setupl Toolsl HelpSoftware operation-IQ SignallMain MenuFil

11、e MenuMenu ItemsDescriptionOpen Signal FileOpens previously captured and saved data from a signal file for analysis.Save Signal FileSaves captured data to a signal file with extension .sig for later analysis.two options exist: Complete Signal: Saves the complete capture independent of what is shown

12、in the top graph Zoomed Signal: Saves only the portion of the signal that is currently shown in the top graphSave Generator FileSaves captured data for use as an input file (modulator file) to the VSG applications signal window.Software operation-IQ SignallMain MenuFile MenuMenu ItemsDescriptionSave

13、 PSDU dataSaves the captured data of the packet to a text file. Two options exist: Packet Info PSDU: Saves the data of the complete packet. PSDU: Saves the data of the PSDU (data) portion of the packet onlyPrint PagePrint the current view to the selected printer.Load SetupLoads a previously saved se

14、tupSave SetupSaves the current setup to a file.Software operation-IQ SignallMain MenuFile MenuMenu ItemsDescriptionLoad Default SetupLoads the default settings for the application.ExitExits the program.Software operation-IQ SignallMain MenuSetup Menu-parametersparametersDescriptionTester IP AddressT

15、he IP address of the testerSample IntervalSelects the duration of time for a sample captureEVM AveragingThe number of most recent measurement that are used to calculate the average EVM number displayed in the measurement results windowTrigger Timeout (sec)Sets the time that IQsignal waits to try to

16、acquire (trigger on) a signalSoftware operation-IQ SignallMain MenuSetup Menu-parametersOFDM Optimization ParametersDescriptionPhase Tracking/CorrChoices are: Off,Sym-by-Sym Corr.,Moving Avg. 10 Sym.Channel EstimateChoices are: 2nd Order Polyfit, Raw, Long Symbol, and Raw, Full Packet.Symbol Timing

17、TrackingChoices are: Off/On.Frequency Sync.Choices are: Short Training Symbols, Long Training Symbols, Full Data Packet.Software operation-IQ SignallMain MenuSetup Menu-parametersOFDM Optimization ParametersDescriptionAmplitude TrackingChoices are Off/On.Enables and disables the Amplitude tracking.O

18、FDM Modulation TypeFour choices exist: 802.11a/g(should be selected to analyze normal 802.11 OFDM signals). 802.11 Turbo Mode(should be selected to analyze Atheros Turbo Mode signals). ASTM DSRC(should be used to analyze half rate OFDM modulated signals). Quarter rate(should be used to analyze quart

19、er-rate OFDM signals).Software operation-IQ SignallMain MenuSetup Menu-parametersOFDM Optimization ParametersDescriptionEqualizer tapsChoices are: Off, 5, 7, or 9 Taps.Remove DCChoices are: Off or On.EVM calculationChoices are: 11b Std., Tx mode acc or rms error vector.Instrument RX IFChoices are: S

20、hort Training Symbols, Long Training Symbols, Full Data Packet.Software operation-IQ SignallMain MenuSetup Menu-Loading Calibration Files IQviewl由於每臺由於每臺IQview的設(shè)置都會有所差異。因此的設(shè)置都會有所差異。因此在在測試之前，都需要執(zhí)行這個選項，以讀取在在測試之前，都需要執(zhí)行這個選項，以讀取IQview的內(nèi)部參數(shù)，來達到最佳的測試效果的內(nèi)部參數(shù)，來達到最佳的測試效果Software operation-IQ SignallMain MenuF

21、ile MenuMenu ItemsDescriptionVector Signal GeneratorStarts the Vector Signal Generator tool. For further details, see the section,Vector Signal Generator presented later in this chapter.VSA PanelLaunches the VSA Panel toolSave PlotsSaves captured data for use as an input file (modulator file) to the

22、 VSG applications signal window.Software operation-IQ SignallMain MenuHelpl顯示該軟件的版本信息l如Software operation-IQ SignallAnalyzing Graph OptionsSoftware operation-IQ SignallAnalyzing Graph Options-AmplitudelAmplitude顯示隨時間變化的信號振幅. 圖形顯示的是瞬時 power 和每段時間的peak powerSoftware operation-IQ SignallAnalyzing Graph

23、 Options-SpectrogramlSpectrogram顯示的是對於給定的頻率,Power隨TIME的變化圖形. 顏色表示的是信號強度。Red表示信號強，Green表示信號弱。Software operation-IQ SignallAnalyzing Graph Options-PSDlPSD-Power Spectrum Densityl以dBm/BW為單位，BW指帶寬（如100kHZ），這裡的帶寬為224kHZSoftware operation-IQ SignallAnalyzing Graph Options-Spectrum MasklSpectrum Mask是反是反映映

24、對別的頻道干擾的可對別的頻道干擾的可能性的參數(shù)能性的參數(shù) Software operation-IQ SignallAnalyzing Graph Options-CCDFlCCDF 曲線的 x 軸（測量單位：分貝）代表輸入或輸出訊號功率，其中 0 分貝代表平均輸入訊號功率。y 軸代表遇到具有給定功率電平的樣本的可能性Software operation-IQ SignallAnalyzing Graph Options-Symbol ConstlSymbol Constellation:The Symbol Constellation graph shows the quality of t

25、he demodulated data in the complex plane for each symbol in the analyzed frame.xqhaddxu:星座圖是通過一個複雜平面內(nèi)的每個點來show出每個解調(diào)量的狀態(tài)，每個點代表一個解調(diào)單元Software operation-IQ SignallAnalyzing Graph Options-Spectral Flatnessl顯示的是一個基於子載顯示的是一個基於子載波頻譜的頻譜平整的波頻譜的頻譜平整的long training sequence而得來的估計而得來的估計量量Software operation-IQ Si

26、gnallAnalyzing Graph Options-LO(DC) LeakagelIt shows the energy level of the carriers relative to that of the center carrier，以2dB為臨界值Software operation-IQ SignallAnalyzing Graph Options-Phase Noise(PSD)lPhase Noise:以以dBc/Hz為單位為單位Software operation-IQ SignallAnalyzing Graph Options-Phase ErrorlPhase Error-以以degree為單位為單位Software operation-IQ SignallAnalyzing Graph Options-I/Q signalslI/Q Signal:The I&Q Signals shows the I and Q signals voltages plotted against time.Software operation-IQ SignallAnalyzing Graph Options-STS PretzellSTS Pretzel-Short