《直放站和室內(nèi)覆蓋系統(tǒng)》總題庫(kù)

1、Manipulatisnowusedasaindustrialrobotsinusethecontrolobjectivesoftenappearofteninindustrialautomation.Industrialautomationtechnologyhasgraduallymaturedasmatureatechnologylinehasbeenrapiddevelopmentinindustrialautomationas

2、aseparatesubject.Manipulatapplicationbegantofilterintoweldinglogisticsmechanicalprocessingotherindustries.Especiallyathighverylowtemperaturesfullofpoisonousgaseshighradiationcaserobotinsimilarcircumstancesshowedgreatusea

3、lsobringsgreatconveniencetothestaff.Preciselybecauseofthisrobottogetpeoplesattentionbegantobeahighdegreeofdevelopment.Labrateswkingconditionslabintensiveaspectsofpromotingdevelopment.BothathomeabroadtodevelopthePLC(progr

4、ammablelogiccontroller)isinvariousspecialcircumstancesunderspecialconditionssetfmechanicaldevices.NowturnedonthedevelopmentofthemicroelectronicsautomaticcontroltechnologytherapiddevelopmentofthetrainsthesuccessofPLChardw

5、aresoftwaresimulationcontrolwinbigsuccessfuldevelopmentnowcontinuestodevelopasafactyautomationstards.Becauserobotsaregooddevelopmentofthetechnologymakesagoodoptimizationofproductivecapitalrobotshowsthisuniqueadvantagessu

6、chas:hasgoodcompatibilitywideavailabilityhardwareiscompleteprogrammingthatcanbemasteredinashttimesointhecontextofindustrialPLCapplicationsbecameubiquitous.Manipulatinmanydevelopedcountryagricultureindustryhasbeenapplieds

7、uchastheuseofmechanicalharvestinglargeareasoffarmlrepeatedoperationsonthehighspeedlinethatusesaroboticarmsoon.Todaythehighlevelofautomationcombinedwithrestrictionsonthemanipulatdevelopmentlevelisslightlylowerthantheinter

8、national.ThedesignismainlyarmweldingmachinebyPLCAutomationcontrol.Thisofdesignletdesignersoninschoolbylearnofhasamustofconsolidationundersthassomeusuallydidntopptunitiesawarenessinwldrangewithinsomeleadinglevelofknowledg

9、ehashasmustawarenesshopedesignerscaninyihouofdesigninthecansuccessofusinginthisdesignintheproceedsofexperience1.2manipulatinbothathomeabroadofresearchprofileautomationmechanicalarmresearchbeganYu20thcenturymediumtermafte

10、ryearswithwithcomputerautomationtechnologyofdevelopmentMakesmechanicalarmontheGrstageofindustrialautomationshinegraduallybecameanindustrialevaluationstardsitsimptancecanbeseen.Nowiginalroboticarmspentmostofmassproduction

11、useontheproductionlinewhichisprogrammedroboticarm.Asthefirstgenerationofmanipulatpositioncontrolsystemsmainfeaturesalthoughnotbackseveralgenerationsthatcandetecttheexternalenvironmentbutcanstillsuccessfullycompletelikewe

12、ldingpaintingdeliveryaswellasfmaterialssimplemovements.Secondgenerationmechanicalarmsareequippedwithsenssmanipulatshavetheenvironmentthereisacertainamountof“sense“whenthemechanicalarmistousetheprogramasabasis.Differencei

13、sthattherobotbegmanipulatcontrolmodeprogrammablecontrollersintroduction2.1discussionwithmanipulatcontrol2.1.1classificationofcontrolrelaysdiscreteelectroniccircuitcancontrololdindustrialequipmentbutalsomecommon.Mainlythe

14、setworelativelycheapyoucanmeettheoldfashionedsimple(simple)industrialequipment.Sohecanseethemnowhoweverthesetwocontrolmodes(relaydiscreteelectroniccircuits)arethesefatalflaws:(1)cannotadapttothecomplexlogiccontrol(2)only

15、fthecurrentprojectthelackofcompatibility(3)notrefmingthesystemwithequipmentimprovements.SpringfthedevelopmentofChinasmodernindustrialautomationtechnologythesubstantialincreaseinthelevelofindustrialautomationcompletedthep

16、erfectrelayofthecomputertoomuch.Intermsofcontrollingthecomputershowedhistwogreatadvantages:(1)eachofthehardwarecanbeinstalledononememicroprocesss(2)theofficialdesignerofthesoftwarewritingcontentcontrolisallabout.Nowinsev

17、eralwaysinthecontextofindustrialautomationcanoftenbeseeninthreeways:(1)ProgrammableLogicalController(referredtoasIPC)(2)DistributedControlSystem(DCSfsht)(3)theProgrammableLogicalController(PLCfsht).2.1.2PLCtheIPCDCScontr

18、astcontrast1eachofthethreetechnologiesofiginsdevelopmentrequirementsffastdataprocessingmakesitinventedthecomputer.Themenbroughtintermsofhardwarethereusingahighlevelofstardizationcanusemecompatibilitytoolsisarichsoftwarer

19、esourcesespeciallytheneedfimmediacyinoperationalsystems.Sothecomputercaneffectivelycontrolisusedtocontrolmeetitsspeedonthevirtualmodelrealtimeincomputationalrequirements.Distributedsystemstartedwithacontrolsystemfindustr

20、ialautomaticinstrumentusedtocontrolwhereasnowitissuccessfullydevelopedintoindustrialcontrolcomputerusedasacentralcollectiondistributionsystemtransitionofdistributedcontrolsysteminanaloguehlingloopcontrolhasbeguntoreflect

21、theuseofahugeadvantage.Thoughdistributedsystemhasgreatadvantagesinloopregulationbutonlyasameansofcontinuousprocesscontrol.OptimizationofPLCisthecrespondingrelayneedswasbnitsmainuseinthewkdercontrolearlyprimaryisreplacedr

22、elaythishulkingsystemfocusedontheswitchcontrollingtherunningderoffunctions.Markedbythemicroprocessintheearly1970ofthe20thcenturyemergedmicroelectronicstechnologyhasdevelopedrapidlypeoplesoonmicroelectronicsprocessingtech

23、nologywillbeusedintheProgrammableLogicalController(thatis直放站與室內(nèi)分布系統(tǒng)試題直放站與室內(nèi)分布系統(tǒng)試題一、單選題一、單選題1.當(dāng)C的施主基站載波擴(kuò)容時(shí)，應(yīng)相應(yīng)對(duì)其直放站進(jìn)行擴(kuò)容。A.寬帶直放站B.頻帶選頻直放站C.載波選頻直放站D.上述都不用2.要求直放站的帶內(nèi)平坦度（峰峰值）小于BA.2dbB.3dbC.4dbD.6db3.對(duì)于載波選頻直放站，在頻譜儀上讀出輸出信號(hào)中心頻率信

24、號(hào)強(qiáng)度下降A(chǔ)dB的頻點(diǎn)f1和f2即為其實(shí)際工作頻帶的上下截至頻率。A.1B.2C.3D.44.直放站到達(dá)施主基站（CDU端）的噪聲電平小于DdBmA.36B.94C.110D.1205.直放站驗(yàn)收規(guī)范要求在900MHz頻段帶內(nèi)所有互調(diào)均小于BdBm。A.30B.36C.33D.406.直放站系統(tǒng)中覆蓋天線與施主天線之間的隔離度應(yīng)大于直放站實(shí)際工作增益加上CdB的冗余儲(chǔ)備。A.3B.5C.10D.157.100mW等于Cdbm。A.40B

25、.33C.20D.308.下列直放站采用的設(shè)備中，C沒有信號(hào)放大功能。A.直放機(jī)B.有源天線C.耦合器D.干線放大器9.你對(duì)天線的增益（dBd）是如何認(rèn)識(shí)的？CA.這是一個(gè)絕對(duì)增益值。B.天線是無(wú)源器件，不可能有增益，所以此值沒有實(shí)際意義。C.這是一個(gè)與集中幅射有關(guān)的相對(duì)值。D.全向天線沒有增益，而定向天線才有增益。10.以下關(guān)于直放站施主天線的描述，哪個(gè)是正確的？DA.位置越高越好B.位置越低越好C.盡量使用全向天線D.盡量使用方向性

26、好的天線11.直放站三階互調(diào)指標(biāo)的測(cè)試，哪個(gè)說(shuō)法是錯(cuò)誤的？DA.在2f1f2處測(cè)量B.在2f2f1處測(cè)量C.在(f1f2)2處測(cè)量D.A和B12.直放站上行噪聲電平到達(dá)施主基站（CDU端）的噪聲電平小于：CA.–36dBmB.–30dBmC.–120dBmD.–124dBm13.室內(nèi)天線的發(fā)射功率不大于：BA.–13dBm載波B.–15dBm載波C.–20dBm載波14.直放站覆蓋天線與施主天線之間的隔離度應(yīng)大于直放站實(shí)際工作增益加上A

27、冗余儲(chǔ)備。A.10dBB.20dBC.30dBD.36dB15.直放站天線隔離度不足會(huì)引起：BA.消壞直放機(jī)模塊B.直放站自激不工作C.堵塞基站D.業(yè)務(wù)天線發(fā)射功率過大16.對(duì)于選頻直放站的頻點(diǎn)改變是由C操作。A.BSC終端B.自動(dòng)隨施主信號(hào)頻率變化而變化C.本地終端設(shè)置17.12普通饋線100米線損為：CManipulatisnowusedasaindustrialrobotsinusethecontrolobjectivesofte

28、nappearofteninindustrialautomation.Industrialautomationtechnologyhasgraduallymaturedasmatureatechnologylinehasbeenrapiddevelopmentinindustrialautomationasaseparatesubject.Manipulatapplicationbegantofilterintoweldinglogis

29、ticsmechanicalprocessingotherindustries.Especiallyathighverylowtemperaturesfullofpoisonousgaseshighradiationcaserobotinsimilarcircumstancesshowedgreatusealsobringsgreatconveniencetothestaff.Preciselybecauseofthisrobottog

30、etpeoplesattentionbegantobeahighdegreeofdevelopment.Labrateswkingconditionslabintensiveaspectsofpromotingdevelopment.BothathomeabroadtodevelopthePLC(programmablelogiccontroller)isinvariousspecialcircumstancesunderspecial

31、conditionssetfmechanicaldevices.NowturnedonthedevelopmentofthemicroelectronicsautomaticcontroltechnologytherapiddevelopmentofthetrainsthesuccessofPLChardwaresoftwaresimulationcontrolwinbigsuccessfuldevelopmentnowcontinue

32、stodevelopasafactyautomationstards.Becauserobotsaregooddevelopmentofthetechnologymakesagoodoptimizationofproductivecapitalrobotshowsthisuniqueadvantagessuchas:hasgoodcompatibilitywideavailabilityhardwareiscompleteprogram

33、mingthatcanbemasteredinashttimesointhecontextofindustrialPLCapplicationsbecameubiquitous.Manipulatinmanydevelopedcountryagricultureindustryhasbeenappliedsuchastheuseofmechanicalharvestinglargeareasoffarmlrepeatedoperatio

34、nsonthehighspeedlinethatusesaroboticarmsoon.Todaythehighlevelofautomationcombinedwithrestrictionsonthemanipulatdevelopmentlevelisslightlylowerthantheinternational.ThedesignismainlyarmweldingmachinebyPLCAutomationcontrol.

35、Thisofdesignletdesignersoninschoolbylearnofhasamustofconsolidationundersthassomeusuallydidntopptunitiesawarenessinwldrangewithinsomeleadinglevelofknowledgehashasmustawarenesshopedesignerscaninyihouofdesigninthecansuccess

36、ofusinginthisdesignintheproceedsofexperience1.2manipulatinbothathomeabroadofresearchprofileautomationmechanicalarmresearchbeganYu20thcenturymediumtermafteryearswithwithcomputerautomationtechnologyofdevelopmentMakesmechan

37、icalarmontheGrstageofindustrialautomationshinegraduallybecameanindustrialevaluationstardsitsimptancecanbeseen.Nowiginalroboticarmspentmostofmassproductionuseontheproductionlinewhichisprogrammedroboticarm.Asthefirstgenera

38、tionofmanipulatpositioncontrolsystemsmainfeaturesalthoughnotbackseveralgenerationsthatcandetecttheexternalenvironmentbutcanstillsuccessfullycompletelikeweldingpaintingdeliveryaswellasfmaterialssimplemovements.Secondgener

39、ationmechanicalarmsareequippedwithsenssmanipulatshavetheenvironmentthereisacertainamountof“sense“whenthemechanicalarmistousetheprogramasabasis.Differenceisthattherobotbegmanipulatcontrolmodeprogrammablecontrollersintrodu

40、ction2.1discussionwithmanipulatcontrol2.1.1classificationofcontrolrelaysdiscreteelectroniccircuitcancontrololdindustrialequipmentbutalsomecommon.Mainlythesetworelativelycheapyoucanmeettheoldfashionedsimple(simple)industr

41、ialequipment.Sohecanseethemnowhoweverthesetwocontrolmodes(relaydiscreteelectroniccircuits)arethesefatalflaws:(1)cannotadapttothecomplexlogiccontrol(2)onlyfthecurrentprojectthelackofcompatibility(3)notrefmingthesystemwith

42、equipmentimprovements.SpringfthedevelopmentofChinasmodernindustrialautomationtechnologythesubstantialincreaseinthelevelofindustrialautomationcompletedtheperfectrelayofthecomputertoomuch.Intermsofcontrollingthecomputersho

43、wedhistwogreatadvantages:(1)eachofthehardwarecanbeinstalledononememicroprocesss(2)theofficialdesignerofthesoftwarewritingcontentcontrolisallabout.Nowinseveralwaysinthecontextofindustrialautomationcanoftenbeseeninthreeway

44、s:(1)ProgrammableLogicalController(referredtoasIPC)(2)DistributedControlSystem(DCSfsht)(3)theProgrammableLogicalController(PLCfsht).2.1.2PLCtheIPCDCScontrastcontrast1eachofthethreetechnologiesofiginsdevelopmentrequiremen

45、tsffastdataprocessingmakesitinventedthecomputer.Themenbroughtintermsofhardwarethereusingahighlevelofstardizationcanusemecompatibilitytoolsisarichsoftwareresourcesespeciallytheneedfimmediacyinoperationalsystems.Sothecompu

46、tercaneffectivelycontrolisusedtocontrolmeetitsspeedonthevirtualmodelrealtimeincomputationalrequirements.Distributedsystemstartedwithacontrolsystemfindustrialautomaticinstrumentusedtocontrolwhereasnowitissuccessfullydevel

47、opedintoindustrialcontrolcomputerusedasacentralcollectiondistributionsystemtransitionofdistributedcontrolsysteminanaloguehlingloopcontrolhasbeguntoreflecttheuseofahugeadvantage.Thoughdistributedsystemhasgreatadvantagesin

48、loopregulationbutonlyasameansofcontinuousprocesscontrol.OptimizationofPLCisthecrespondingrelayneedswasbnitsmainuseinthewkdercontrolearlyprimaryisreplacedrelaythishulkingsystemfocusedontheswitchcontrollingtherunningderoff

49、unctions.Markedbythemicroprocessintheearly1970ofthe20thcenturyemergedmicroelectronicstechnologyhasdevelopedrapidlypeoplesoonmicroelectronicsprocessingtechnologywillbeusedintheProgrammableLogicalController(thatisA.0~5dBB.

50、0~20dBC.5~20dBD.20dB37.以下哪種類別的天線支架是用來(lái)安裝八木天線的DA.TXJ2B.TXJ3C.TXJ4D.TXJ5二、多選題二、多選題(5(5分)1.下列哪些直放站為頻段選頻直放站ABCA.R9110ACB.RS2110BC.R9110ASD.RS21222.增益可調(diào)范圍為40dB的直放機(jī)有BCA.RS2110B.R9110ASC.R9122ACD.M4000AP13.以下哪些器件不是R9110AC型直放站的內(nèi)部

51、器件BEFA.低噪放B.載波選頻模塊C.電調(diào)衰減器D.雙工濾波器E.波分復(fù)用器F.腔體濾波器G.監(jiān)控模塊H.電源模塊4.直放站具有以下哪些作用ABDA.轉(zhuǎn)發(fā)基站信號(hào)，擴(kuò)大基站覆蓋范圍。B.盲區(qū)覆蓋，改善現(xiàn)有網(wǎng)絡(luò)的覆蓋質(zhì)量C.改善接收信號(hào)質(zhì)量，提高基站信號(hào)的信噪比D.話務(wù)分流5.以下哪些接頭是公頭(針頭)ADA.NJ138″CB.NK12″CC.NK78″CD.NJ8C三、填空題三、填空題(89(89分)1.通常測(cè)試直放站系統(tǒng)質(zhì)量的儀表有

52、頻譜儀、Sitemaster、TEMS。2.直放站帶內(nèi)平坦度峰峰值應(yīng)小于3db3.一般直放站的額定增益應(yīng)大于等于85db4.目前直放站按頻率分有寬頻和選頻兩種，5.如果信號(hào)直放站信號(hào)不能提供足夠大給室內(nèi)分布系統(tǒng)，需要使用干線放大器放大信號(hào)。6.室內(nèi)覆蓋使用的主要無(wú)源器件有：耦合器、功分器、合路器、饋線和室內(nèi)天線。7.選頻直放站設(shè)備選擇某個(gè)載波后的實(shí)際工作帶寬必須為200KHz。8.直放站帶外雜散波在900MHz頻段要求小于36dBm，1

53、800MHz頻段要求小于30dBm。9.阿爾創(chuàng)直放機(jī)機(jī)箱上的顯示燈：綠色顯示正常工作；黃色顯示電源開通；紅色顯示報(bào)警。10.阿爾創(chuàng)選頻直放站最小容量為2個(gè)載波，通過增加信道板可擴(kuò)展到8個(gè)載波。11.對(duì)于選頻直放站，如果有一選頻模塊不工作，那么施主站網(wǎng)絡(luò)指標(biāo)表現(xiàn)為掉話率升高，接通率下降。12.選頻直放站對(duì)于需放大的每個(gè)載波，提供獨(dú)立的低噪放大器、上下變頻器、中頻濾波器和功率放大器。13.阿爾創(chuàng)OMT軟件可以遠(yuǎn)程對(duì)直放站進(jìn)行狀態(tài)檢測(cè)、參數(shù)修