repeater与CTCSS关系.ppt

EMERGENCYMEASURESRADIOGROUP OTTAWAARES TwoNames OneGroup OnePurpose EMRG 403 TrainingCourse CrossBandRepeaters DateOfLastChange 2009 11 04 Version 1 1 EmergencyMeasuresRadioGroup EMRG OttawaARES 2 CourseNumber EMRG 403CourseName UsingCrossBandRepeatersInstructorLed OptionalPrerequisites NoneWhatYouShouldLearnFromThisCourse Fromthiscourseyoushouldunderstandthebenefits limitationsandpropermethodstosetupanduseacrossbandrepeaterRecommendedReading EMRG 409IntroToCTCSSReadyourradiomanualifyourradiohascrossbandrepeatcapability CourseIntroduction WhatIsAnInBandRepeater Transmit Receiveareinthesameband ThisisatypicalAmateurVHForUHFrepeaterusedeveryday RequiresaDuplexertoseparateReceiveandTransmitsignals orseparateantennasseveralhundredfeetapart EmergencyMeasuresRadioGroup EMRG OttawaARES 3 DUPLEXER Addsorseparatessignalsfromthesameband wherethesignalsarecloseenoughtogetherinfrequency thattheattachedequipmentisnotabletorejecttheunwantedsignal EmergencyMeasuresRadioGroup EMRG OttawaARES 4 TunabletoPassthedesiredfrequencyandRejecttheundesiredfrequencyUsedforrepeatersandfullduplexbasestations WhatIsACrossBandRepeater Transmitfixedsiteusedtolinkneighbouringsystemsmobilepermanentlyinstalledinavehiclemovable madefrommobileorportableradios Canuseseparateantennasforeachband oraDiplexeranddualbandantenna EmergencyMeasuresRadioGroup EMRG OttawaARES 5 DIPLEXER Addsorseparatessignalsfromdifferentbands wherethesignalsarefarenoughapartinfrequency thattheattachedequipmentisabletorejectanyunwantedsignalwithoutimpactingthedesiredfrequency EmergencyMeasuresRadioGroup EMRG OttawaARES 6 Nottunable fixedfrequencybandsUsedformultibandradioswithasinglemultibandantenna TheValueOfCrossBand Interoperability UsedbyPublicSafetytolinkagenciesondifferentbandsExtendsportableradiocoverageUsedeverydaybyPublicSafetyasaVehicleRepeaterUsedbyAmateurstoextendrange orextendcoverageintoabuilding suchasashelterinanemergency Compactcomparedtoaninbandrepeater EasytomakeportableunitSomeAmateurmobileradioshaveabuiltincrossbandrepeatercapability EmergencyMeasuresRadioGroup EMRG OttawaARES 7 OneWayRepeat Uni Directional Onewayrepeatingusedwhentheportableradiocanheartherepeater butcannottransmitbackduetodistance buildingsorlowerpower EmergencyMeasuresRadioGroup EMRG OttawaARES 8 VHFRepeater UHF VHF VHF DualBandOneWayRepeater DualBandPortable OneWayRepeaterreceivesfromtheportableradioonasimplexfrequencyonanotherband andtransmitstotherepeaterontherepeaterinputfrequency Twoconfigurations CrossBand OneWayRepeaterandportableradiomustbedualbandInBand OneWayRepeatermusthaveaduplexerBenefits Repeatertailisnotaproblem TheonewayrepeaterisnotreceivingfromthemainrepeaterFullduplexoperationwhendualbandradiosused talk listenatsametime EmergencyMeasuresRadioGroup EMRG OttawaARES 9 OneWayRepeatcontinued Uni Directional TwoWayRepeat Bi Directional Bi directionalrepeatingusedwhenportableradiocannotreceivetherepeaterreliably ANDcannottransmitbacktotherepeaterduetodistance buildings lowerpower Portableradiotransmitsandreceivesonsimplexfrequencytocrossbandrepeaterandcrossbandrepeatertransmitsandreceivesonrepeaterfrequencies EmergencyMeasuresRadioGroup EMRG OttawaARES 10 VHFRepeater UHF UHF VHF CrossBandRepeater TwoWayRepeat Bi Directional Benefits ExtendsReceiveandTransmitforreliablecommunicationsinbothdirectionsUHFportablehasgoodbuildingpenetration whileVHFhasgreaterrangeProblem WhilemanyAmateurradioshaveacrossbandrepeatfunctionality notallimplementitwell Setupyourradioandtestitwithsomeoneelse toconfirmthattheaudioisclearandtherepeaterworksasyouexpect EmergencyMeasuresRadioGroup EMRG OttawaARES 11 EmergencyMeasuresRadioGroup EMRG OttawaARES 12 InBuildingExample VHFRepeater UHF VHF UHFRadioInsideBuilding CrossBandRepeaterInTheParkinglot ExtendedCoverageExample EmergencyMeasuresRadioGroup EMRG OttawaARES 13 UHF VHF VHFRepeater CrossBandRepeaterOnHighPoint PortableorMobileRadioBelowHill CAUTION OnlyOneDirectionAtATime CrossbandrepeaterscanreceiveonVHF UHFatthesametime solongastheyarenottransmitting Oncethecrossbandrepeaterselectsanincomingsignalononeband thetransmitterontheotherbandisactivated Therepeaternowonlyreceivesononebandandtransmitsontheotherband Thecrossbandrepeaterwillstayinthisconfigurationuntiltheincomingsignalstops EmergencyMeasuresRadioGroup EMRG OttawaARES 14 CAUTION RadioBurnOut MobileradiosusedforCrossBandrepeaters arenotdesignedforlongperiodsoftransmitting Setthepowerlevelscarefully IfusingcrossbandingintoabusyVHFrepeater theUHFtransmitterinthecrossbandrepeaterwillbeactiveanytimetheVHFrepeaterisactive SettheUHFtransmitpoweraslowaspossible AddafanifpossibleUsebetterantennas solesspowerisrequired EmergencyMeasuresRadioGroup EMRG OttawaARES 15 CAUTION RepeaterTail Repeatertailisthetimearepeatercontinuestotransmit aftertheincomingsignalstopped EMRGtriestosettailasshortaspossible Ifthecrossbandrepeaterisreceivingfromthemainrepeaterandtransmittingtotheportable thecrossbandrepeaterwillcontinuetotransmittotheportableuntiltheincomingrepeaterstopstransmitting taildrops Allradiooperatorsshouldleaveopenspaceafteramessagetolettherepeatertaildrop sopeopleusingcrossbandcangetin EmergencyMeasuresRadioGroup EMRG OttawaARES 16 CrossBandTrafficPattern EmergencyMeasuresRadioGroup EMRG OttawaARES 17 VHFRepeater VHF UHF UHFPortableRadio CrossBandRepeater OnlytransmissionsfromthePortableRadiowillbetransmittedbytheCrossBandRepeater EverythingontherepeaterwillbetransmittedbytheCrossBandRepeatertothePortableradio CrossBandUHFTransmit CrossBandVHFTransmit USECTCSS CrossBandrepeatersrepeateverything includingtheselectedrepeaterandintermod MostrepeaterstransmitaCTCSStone SetyourcrossbandrepeatertoreceiveonlywhenthattoneispresenttokeepfromcrossbandingVHFintermodtoyourUHFportable ItispossiblethatyouarenottheonlypersonusingCrossBandRepeatonaspecificUHFsimplexfrequency CTCSStonescanhelpreduceinterference EmergencyMeasuresRadioGroup EMRG OttawaARES 18 CTCSSCrossBandExample EmergencyMeasuresRadioGroup EMRG OttawaARES 19 VHFRepeater UHF VHF CrossBandRepeater Receive 146 280MHz CTCSS 136 5 Transmit 446 200MHz CTCSS 136 5Hz Transmit 146 280MHz CTCSS 136 5 Transmit 146 880MHz CTCSS 136 5Hz Receive 146 880MHz CTCSS 136 5Hz Transmit 446 200MHz CTCSS 136 5 Receive 446 200MHz CTCSS 136 5 Receive 446 200MHz CTCSS 136 5Hz CrossBandRepeaterEncode Decode UHFPortableRadioEncode Decode VHFRepeaterEncode Decode UHFPortable PushPTT Wait2Seconds Thereisadelaywhenusingcrossbandrepeatersbecausetherepeaterneedstoreceivetheincomingsignalandactivatethetransmitintheoppositedirection Pushandwait2secondsappliestoallusersontherepeater whethertheyareusingcrossbandornot Anexampleofwhathappenswhenpeopledonotwait istheycutoffthecallsignofthepersonbeingcalled soallthatisheardisthecallsignofthepersoncalling AmoreseriousexampleisifthereplyisNOFIRE andtheradiooperatorpushesthePTTandtalksrightaway theotherendwillgetthemessageFIRE EmergencyMeasuresRadioGroup EMRG OttawaARES 20 TwoCrossBands Iftwostationsareusingcrossbandrepeatersandtheyaretalkingthrougharepeater thedelaycanbesignificant soALLoperatorsneedtowaitbeforetheyspeak EmergencyMeasuresRadioGroup EMRG OttawaARES 21 VHFRepeater DELAY 1 CrossBandRepeater UHFPortable CrossBandRepeater UHFPortable DELAY 2 DELAY 3 ExtendSimplexRange CrossBandrepeaterscanbeusedbacktobacktoextendtherangeofsimplexcommunications UsingseparatetransmitandreceiveantennasonthecrossbandrepeaterswouldallowaVHFbeamtoextenddistance EmergencyMeasuresRadioGroup EMRG OttawaARES 22 CrossBandRepeater UHFPortable CrossBandRepeater UHFPortable UHF VHF UHF ItWorksBothWays Thecrossbandrepeaterdoesnotcarewhichbandisaportableradioandwhichisarepeater AVHFportablecanbeusedwithacrossbandrepeatertoextendtherangeofaUHFrepeater EmergencyMeasuresRadioGroup EMRG OttawaARES 23 UHFRepeater VHF UHF CrossBandRepeater VHFPortable PRACTICEUSINGCROSSBAND InEMRGdeploymentsandexercises itbecameveryclearthatusingacrossbandrepeaterisnotassimpleasitappears Therecanandwillbeissues WriteoutthestepsrequiredforyourradiotoconfigureasimplexchannelwithCTCSSandhowtoactivatethecrossbandrepeater Thereisnosubstituteforregularpractice Setupyourcrossbandwhencheckingintotheweeklynet ThishelpsyouunderstandyourradioandithelpsothersremembertopushthePTTandwaitbeforetheyspeak EmergencyMeasuresRadioGroup EMRG OttawaARES 24 SelfTest IfyouwanttohaveaVHFandUHFradioshareasingleantenna doyouneedaDuplexer oraDiplexer ListonevalueofusingaCrossBandRepeater ShouldyouuseCTCSSonacrossbandrepeater Why Whatcausescrossbandrepeaterstoburnout Ifsomestationsareusingcrossbandrepeaters andyouarenot shouldyoutransmitbeforetherepeatertaildrops beforetherepeaterstopstransmitting Why WhydoyouneedtowaitafteryoupressthePTT beforeyoutalk CanyouuseacrossbandrepeaterwithaVHFportableradio extendingintoaUHFrepeater Cancrossbandrepeatersbeusedbacktobacktoextendsimplexrange EmergencyMeasuresRadioGroup EMRG OttawaARES 25 Answers EmergencyMeasuresRadioGroup EMRG OttawaARES 26 IfyouwanttohaveaVHFandUHFradioshareasingleantenna doyouneedaDuplexer oraDiplexer Answer DiplexerListonevalueofusingaCrossBandRepeater PossibleAnswers Interoperability Extendsportableradiocoverage CompactcomparedtoaninbandrepeaterShouldyouuseCTCSSonacrossbandrepeater Why Answer YesyoushoulduseCTCSStokeepfromcrossbandingintermocWhatcausescrossbandrepeaterstoburnout Answer Settingthetransmitpowertoohightotheportableradio whencrossbandingintoabusyr