instructions for lemon rx receivers · antennas (aerials) and their orientation, as well as by the...

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TheseinstructionsarewrittenbytwousersonRCGroups:jj604andDaedalus66.WearenotassociatedwithLemonRX.LemonRXandOrangeRXarebrandnames.Spektrum,DSM2,DSMX,X-BUS,Airware,STi,andtheTelemetrylogoareTrade

MarksofHorizonHobby.Thesenamesareusedheresimplyasdescriptionsofthoseitems.

InstructionsforLemonRXReceivers1.DSMXvsDSM2–andLemon'sownDSMP..........................................................................12.Binding................................................................................................................................................23.WhattheLEDsMean.....................................................................................................................34.AntennasandSatellites...............................................................................................................45.Failsafe................................................................................................................................................66.ConnectionsandSwitchesontheVariousLemonReceivers......................................86channelDSM2-compatibleFeatherLight–LM0019/0021/0023........................86channelDSM2-compatibleUltraLight–LM0026........................................................86channelDSM2-compatibleMicroLight–LM0025.......................................................96channelDSMX-compatible–LM0027/0034/0028.....................................................97channelDSMX-compatibleStabilizerandStabilizerPLUS–LM0005/00032/0033.0042/0043/0044.........................................................................107channelreceiverswithtelemetryandPPM–LM0041/0052...............................108and10channelreceivers–LM0015/0016/0017/0018/0040/0003..............118channelDSMX-compatiblePPMreceiver–LM0039/0007...................................12SatelliteReceivers–LM0001/0008/0037.......................................................................12

1.DSMXvsDSM2–andLemon'sownDSMPMostLemonreceiversarefullyDSMX-compatibleandbackwardcompatibletoDSM2.The“FeatherLight”seriesandsomeoftheotherolderreceiversareonlyDSM2-compatible.TheDSMXprotocoldevelopedbySpektrumincludesfrequencyhoppingformorereliableoperationinareasofhighpotentialinterferencefromother2.4GHztransmitters,butreceiversusingtheolderDSM2protocol,alsobySpektrum,continuetoworkwellinallbutthemostdemandingconditions.Lemon“DSMX-compatible”receiversworkwithanyDSMX-compatibletransmitterandarebackwardcompatiblewitholderDSM2-typetransmitters.

Lemon“DSM2-compatible”receiversworkwitheitheraDSM2-compatibletransmitteroraDSMX-compatibletransmitteroperatinginDSM2mode.

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MostrecentSpektrumDSMXtransmitterssupportbothmodesandwillautomaticallydetectaDSM2receiveratbindtime.TheexceptionsaretransmitterssoldintheEUsince2015andtheDXe,whichsupportonlyDSMX.1

DSM2intheEU.AsignificantchangeofregulationsintheEuropeanUnionrequiresthattransmitterssoldthereafterJanuary1,2015NOTincludeDSM2modulation.Consequently,DSMXtransmittersnowsoldintheEUsupportonlyDSMX-typereceivers.Transmitterssoldbefore2015thatincludeDSM2capabilitycontinuetobefullylegalforuse.

SpektrumDXe.Thelow-costSpektrumDXetransmittersupportsonlyDSMX,whereveritissoldintheworld.OthercurrentSpektrumtransmitterscontinuetosupportbothDSMXandDSM2,exceptintheEU.

Lemon“DSMP”receiversworkwitheitheraDSM2-compatibletransmitteroraDSMX-compatibletransmitter.DSMPisLemon’sproprietaryprotocolthatincludesDSM2andDSMXcompatibilitybutaddssomeadditionalfeatures.

2.BindingBindingistheprocessof“locking”thereceivertoitsowntransmitter(and,whererelevant,toaparticularmodelmemorywithinthetransmitter)sothatitignoresanyothers.Bindingisthefirststepinsettingupanyreceiver.Ensurethetransmitterandreceiverareseparatedby3-6ft/1-2morthetransmittermay“swamp”thereceiver.Occasionally,itmaybenecessarytohaveasmuchas10ft/3mseparationtoachievebinding.Generallyyoushouldonlyneedtobindonceand,afterbinding,normallink-upshouldnotrequiremorethanacoupleoffeetofseparation,butincaseoftroublelinkingup,movefurtheraway.

Step1.PowerupthereceiverinbindmodeFormostreceivers:putthebindplugontothebindpins.For6-channelUltraLightandMicroLightreceivers,pressandholdinthebindbutton.

Connectasuitablepowersourcetothereceiverthrottleservopins.Thiscanbe:

• areceiverpackbattery(generally3.45–7.2v)2;or• astand-aloneBEC;or• thethrottleconnectionfromyourspeedcontroller(ESC)withinbuiltBEC

(iftheESCisinamodel,disconnectthemotororremovethepropeller).

TheredLEDonthereceiverwillflashrapidlytoindicatebindmode.Ifitdoesn’t,youhaveaproblem(suchasreversedpowerconnector3).MakeabsolutelysuretheLEDisflashingrapidlybeforegoinganyfurther.

1 TransmittersotherthanSpektrumthatuseDSMXorDSM2protocol,includingthosewithaplug-inmodule,aregenerallyfullyusablewithLemonreceivers.OneknownexceptionistheStabilizerPLUS,whichmayhaveissueswiththeSpektrumDM9andsomeOrangeRXmodules.Youshouldbeparticularlycarefulaboutrangecheckingifusinganadaptedtransmitter.2 Checkindividualspecificationsassomereceiversmayworkwithinadifferentvoltagerange.3 Reversingtheconnectorwillnotdamagethereceiver,butitwillpreventbinding.

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Step2.TurnontransmitterinbindmodeOnsometransmittersbindmodeisactivatedbyholdingtheTrainerbutton/switchorbindbuttonwhilepoweringup.Othersrequiregoingintoamenutoenablebindmode.Ifindoubt,readthemanual.Whereappropriate,continuetoholdtheswitch/buttonuntilthereceiverLEDstopsitsrapidflashing.Releaseitatthatpointandthebindprocesswillcomplete.AsolidlightontheLEDindicatessuccessfulbind.Sometransmitterswilldisplayonscreenorannouncethetypeofbind(DSM2orDSMX)andtheframerate(normally22mS).Step3.PowerdownandtestRemovepowerfromthereceiver,removethebindplug(veryimportant!)andswitchthetransmitteroff.Turnthetransmitterbackon,thenapplypowertothereceivertocheckthatthereceiveroperatesproperlyandservosrespondtothetransmittercontrols.NOTES:1. Ifasatelliteisused,itmustmatchthemainreceiver;thatis,aDSM2-

compatiblereceivershouldhaveaDSM2-compatiblesatellite,andlikewiseforDSMX-compatibleunits.

2. Ifyourreceiverusesasatellite,thenbindingMUSTbedonewiththesatelliteconnected.BothreceiverandsatelliteLEDsshouldflashrapidlyatthebeginningofthebindprocess,thenbecomesolidtoindicatebind.

3. Bindingcanbedonewithorwithoutservos.Servospluggedinthewrongwayroundmaypreventbinding,socheckthisifyouhavedifficulty.

4. IfyouexperiencedifficultygettingaDSM2-onlyreceivertobindwithaDSMXtransmitter,tryforcingthetransmitterintoDSM2mode(iftheoptionisavailable).

5. Alwaysperformarangecheckafterbinding,usingtherangecheckfunctiononyourtransmitter.Thisattenuatestransmitterpowersothatrangeisreducedbyafactorofabout30.WithSpektrumtransmitters,fullcontrolinrange-checkmodeat30yds./25m(roughly30pacesformanyadults)indicatesamplerangefornormalvisualflying.Itisgoodpracticetoperformarangecheckatthebeginningofeveryday’sflyingtoensureeverythingisworkingproperly.

6. OneuseronRCGroups(Fang2013)foundthatwhenusingaSpektrumTM1000andaCastleSpektrumTelemetrydonglethesatellitewouldnotbindalthoughthemainLemon10channelreceiverdid.HesolvedthisbydisconnectingthesignalwirefromtheplugfromTM1000totheLemonRxbindport.

3.WhattheLEDsMeanAllLemonreceiversandsatelliteshavearedLED.Some,includingthe7-channelstabilizer,alsohaveLEDsofothercolors.1. ArapidlyflashingredLEDindicatesthereceiverisinBindmode

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2. AsolidredLEDindicatesnormalradiolinkbetweenreceiverandtransmitter(i.e.,thereceiverisboundtothetransmitter).

3. NoredLEDmeansthereisnoradiolink.4. AslowlyflashingredLEDonareceiverinDSM2compatiblemode

indicatesthattherehasatsomestagesinceitwaspoweredupbeenapowerlossorsignificantvoltagedrop(howeverbrief),oftencalleda“brownout”.Theflashingmayindicateaninadequatereceiverpowersupplyoritmaymeansimplythattheoperatorfailedtoturnoffthetransmitterwhenpoweringdownthereceiver.Itdoesnotindicatearangeorsignallossissue.ReceiversinDSMX-compatiblemodedonotprovidethis“brownoutwarning”.

7. Onthe8/10-channelDSM2compatibleand10-channelDSMXcompatiblereceiversarapidlyflashingGreenLEDatpowerupindicates11mSframeratemode.

8. Onreceiversequippedwithafailsafebutton,asolidgreenLEDindicatesthatuser-defined(preset)failsafehasbeenset.NogreenLEDonthesereceiversindicatesthatfailsafeisinthedefaultmode,inwhichlossofsignaltriggersremovalofallpulsesfromtheoutput.Thisisexplainedinthesectiononfailsafe,startingonpage7.

9. The7chStabilizedreceiverhasbothredandgreenLEDsthatareusedtoindicatebindingandstabilizationstatusaswellasreceiverversion.The7chStabilizerPLUSreceiverhasared,blueandtwogreenLEDsthatareusedtoindicatebindingandstabilizationstatusaswellasfailsafeandautolevelsettings.Seetheseparateinstructions(availableontheLemonwebsiteorintheRCGroupsLemonInstructionsthread)forinformationonsettingupthetwostabilizedreceivers.

10. The7chTelemetry-enabledPPMreceiverhasred,greenandblueLEDsthatareusedtoindicatebinding,stabilizationandPPMstatus.Seetheseparateinstructions(availableontheLemonwebsiteorintheRCGroupsLemonInstructionsthread)forinformationonsettingupthisreceiver.

4.AntennasandSatellitesAllLemonreceiversare“fullrange”,includingthe“Light”series.InpracticeLemonreceiversmatch,orbetter,therangeofcomparableSpektrumDSM2/DSMXandotherDSM2/DSMX-compatiblereceiversunderthesameconditions.Howevertherangeofanyreceiverisaffectedbythenumberofantennas(aerials)andtheirorientation,aswellasbytheinstallationinthemodel,makingcomparisonsdifficult.SomeLemonreceiversandsatelliteshaveoneshortactiveantennawire,whileothersalsohaveasecondidentical“reflector”wire.Somecomewithlongertwindiversityantennasorhavethemasanoption.Forthestrongestandmostreliablereceptionthereareanumberofgoodpracticestofollow.

Forreceiversandsatelliteswithshortwireantennas:1. Thewire(s)shouldstickreasonablystraightoutfromthereceiver/

satellite;wheretherearetwo,theyshouldbeinanapproximatelystraightline.Antennasthatarebentalongthereceiver/satelliteboardmayhaverangereducedby10-15%.

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2. Ifasatelliteisconnected,itshouldbelocatedasfaraspossiblefromthemainreceiver,notrightnexttoit.

3. Ifasatelliteisconnected,mostreliablereceptionisobtainedwhenthesatelliteantennaandmainreceiverantennaareatrightangles.

Thelargernon-diversityreceivers(e.g.,7,8-and10-channel)donothaveasecondshortantennawire,asthecircuitboardservesthereflectorfunction.

Asmallreceiverwithonlyasingleantennawire(includingsatellite-enabledreceiverswhenoperatedwithoutasatellite)willgenerallyhavelessrangebyabout10-15%thananequivalenttwinshortantennawireversion.Thisisstillamplerangefornormalflying.Forreceiverswithdiversityantennas:Receiverswithdiversityhavetwoantennasmadeofcoaxialcablewiththelast32mmofouterinsulationandconductivesheathremovedtocreateawhiteorsilveractiveportion(theantennaproper).

Theantennacablesareconnectedtoanelectronicswitchthatcanselectbetweenthem.Thereceiverwillswitchantennasveryquicklyifthesignalfromtheoneitisusingresultsinerrorsinthedatabeingreceived.Theswitchingoccurswithin300mSandnosignalislostduringtheswitchingperiod.Thisantenna-switchingstrategyiscommonlycalled“diversity”intheRCworld.

SatellitesSomereceiversalsohaveaconnectortoallowtheuseofasatelliteforadditionalsignalrobustnessthroughanotherformofdiversity.Thesatellitemaybeeitherashortantennatypeoronewithdiversityantennas.Theprotocolsofreceiverandsatellite(DSM2orDSMX)mustmatch.

Asatellitedoesnotsignificantlyincreasethemaximumpossiblerange.Rather,asaseparatestand-alonereceiveritincreasestheprobabilitythatareliablesignalwillbeobtainedatalltimesnomattertheorientationofthemodel.Inordertomaintainavalidsignalthereceiverwillswitchbetweenthesignalprovidedbyitsownantennaandthatcomingfromthesatellitereceiverifitdetectserrors.Notethatifboththereceiverandthesatellitehavediversityantennasthisgivesuptofourseparatesignalsourcesforthereceiver/satellitecombination.

AntennaorientationanddiversityTheantennasweuseforradiocontrolradiate(andreceive)inalldirections,butthesignalismuchweakerofftheendsoftheantenna(theactiveportionofthecable)than"broadside"toit.Thinkofanancientnavalbattlewheretheshipshadverylittlefirepowerforeandaftbecausemostoftheircannonwerepointedoutthesides.

Toachievethemostreliablepossiblelinktothemodel,therefore,whatwewanttoavoidaresituationsinwhichthetransmitterandreceiverantennasareend-ontoeachother.

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Forthetransmitter,theadvicetothepilotissimple:don'tpointtheantennaatthemodel.4Forthereceiver,thingsaremorecomplicatedbecausethemodelisconstantlychangingitsorientationrelativetothetransmitter.Asinglereceiverantennawillinevitablybepointedatthetransmittersomeofthetimeandthusinarelativelyweakorientationforreception.

Thisiswherediversitycomesin.Ifthereceiverhastwoactiveantennaspositionedatrightanglestoeachother,theycanneverbothbepointedatthetransmittersimultaneously.Thereceiverjusthastoselecttheantennathatisgivingthebettersignalrightnow.That'swhatdiversityswitchingdoes.

DiversityimprovesthereliabilityoftheRFlinkinotherways.Ifthetworeceiverantennasarewellseparated,atleastoneshouldhaveaclearviewofthetransmitter,minimizingtheriskofsignalblankingbyconductivematerialsonboardthemodel.Aswell,withantennasatrightangles,oneofthemshouldbesomewherenearparalleltothetransmitterantenna,thusroughlyaligningpolarizationforastrongersignal.Conductivematerialssuchasfoilcoverings,batteries,metalcomponentsandcarbonfibercanabsorbandshieldtheincomingradiosignal.Radiosystemson2.4GHzhaveaveryshortwavelengthandaresusceptibletothis.Receiverantennasneedtobeplacedsothatthiseffectisminimized.

ReceiverinstallationWhatallthismeansfortheinstallationofareceiverissimple.

Ifthereceiverhasdualdiversityantennas,makesuretheactivetipportionsareseparatedasfaraspracticalfromeachotherandfromconductivestufflikebattery,wiringandcarbonfiber.5Aligntheseportionssotheyareatrightanglestoeachotherandreasonablystraight.Thecoaxcableportionoftheantennascanbecurvedtoachievethisbutmustnotbesharplybent.

Ifasatelliteisconnected,itshouldbewellawayfromthemainreceiver,notrightnexttoit.Alignitsothesatelliteantenna(s)andatleastonemainreceiverantennaareroughlyatrightangles.

Takeallthisseriouslybutdon'tgetparanoid.Theinstallationdoesn'thavetobeperfecttosupportanadequatelystrongRFlink.Ourmodernreceiversdoaremarkablejobofpickingupthesignal,evenwithjustasimplesingleantenna.Diversityisnotessentialinmostcasesbutcanbethoughtofasextrasecurityforwhenthegoinggetstough.

And,asalways,rangetestingisessential.Itshouldbedoneverythoroughlybeforethefirstflightofanewinstallation,withreceptiontestedfromalldirectionsbywalkingaroundthemodel.Ifcontrolbecomeserraticfromanydirectionat30yards/25mrangeit’stimetoreviewandimprovetheinstallation.Oncethesetupisproven,aquickrangecheckat30pacesbeforethefirstflightofthedayisallthat’sneededtocheckthatthingsareworkingastheyshould.4 NewerSpektrumtransmittersovercomethisissuebyincorporatingdualdiversityantennasorientedatrightangles.5 Helicopters,multicoptersandglidersthatuselotsofmetalorcarbonfiberconstructionrequireparticularcareinlocatingreceiversandsatellitestoensurethatatleastoneantennareceivesaclearsignalregardlessoforientation.

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5.FailsafeTheprimarypurposeoffailsafeistominimizetheriskofinjuryanddamageshouldthereceiverlosesignalwhilethemodelispoweredup,whetherflyingorontheground.Thekeysafetyrequirementisthatthemotorbeshutdownonlossofsignal.

ThreetypesoffailsafeareusedbythevariousLemonreceivers:

1.Throttle-onlyPre-setFailsafeOnlossofsignal,thethrottlechannel(CH1)goestoapresetpositiondeterminedbythepositionofthethrottlestickduringbinding.Otherchannelsreceivenopulsesandthusservosstayintheircurrentpositions.ThisissimilartotheSpektrum“SmartFailsafe”approach.ThistypeoffailsafeisusedonlybytheLightseriesof6-channelDSM2-compatiblereceivers.Tosetthecorrectthrottlefailsafetheusermustplacethethrottlestickinfulllowpositionwhenbinding.Thisisveryimportant!

2.NoPulseFailsafeModernspeedcontrols(ESCs)goautomaticallytoOFFifnocontrolpulsesareavailable.ThisimportantsafetyfeaturecanbeusedtoachievefailsafebehaviorifonlossofsignalthereceivercutsoffpulsestotheESCandotherchannels.Thisresultsinthemotorshuttingdownandtheservosnotmoving.Anadvantageofthisapproachisthatitdoesnotrelyontheoperatortoensurethatthethrottlestickisatlowpositionwhenbinding.However,itisnotsuitableforusewithamodelpoweredbyaninternalcombustionengine(gloworgasoline),orwithanESCthatlacksautooff.

ThistypeoffailsafeistheonlyoneusedbytheLemon7-channelstabilizer.NoPulseFailsafeisthedefaultforthe6-channelDSMX-compatible,7-channelTelemetryenabledDSMX-compatiblePPMreceiver,7-channelDSMXcompatibleStabilizerPLUSreceiver,8and10channelDSM2-compatibleandDSMX-compatiblereceivers,and8-channelPPMreceivers(boththecurrentDSMX-compatibleversionandtheearlierDSM2-compatibleunit).

3.User-DefinedFailsafeThistypeoffailsafeallowstheoperator,afterbindingthereceiver,tosetthedesiredfailsafepositionsofallchannels.Thisallowsforsuchspecialfailsaferequirementsashavingaglidergointoaspiralwithspoilersdeployedinordertopreventaflyaway.Likewise,multicoptersmayhaveafailsafecommandtoreturnhomeusingGPS.User-DefinedFailsafe,alsoknownasPre-setFailsafe,isausersetoptiononthe6channelDSMXcompatible,7-channelTelemetryenabledDSMXcompatiblePPMreceiver,7-channelDSMXcompatibleStabilizerPLUSreceiverand8and10channelreceivers,includingthePPMunits.

Asexplainedabove,thedefaultforthesereceiversisNoPulseFailsafe.

SettingUser-DefinedFailsafe.Whereuser-definedfailsafeisavailable,thereceivercanbesettouseitasfollows:

1)Removeanypowersourcefromreceiver.2)Insertbindplug.

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3)Poweronthereceivertoenterbindmode.4)BindthereceiveranduponsuccessfulbindingDONOTremovebindplug.5)Setthetransmittercontrolstothedesiredfailsafepositionsandobservethatservosareatthecorrespondingposition.6)Pressinthefailsafebuttononthereceiverbriefly.7)ThegreenLEDonthereceiverwillturnontoindicatethatfailsafepositionshavebeenstored.Iffailsafewassetearlier,pressingbuttonwillcausethegreenLEDtoturnoffanddisablefailsafe.

Henceforth,wheneverthereceiverispoweredup,thegreenLEDwillindicate“user-definedfailsafe”.Ifsignalislost,thereceiverwilloutputthepre-setpositionsafterapproximately3secondsandmaintainthemuntilavalidsignalisagainreceived.

Testthefailsafesettingsbyturningoffthetransmitter,aftertakingallnecessaryprecautions,suchasremovingpropellersorrestrainingthemodel.Toreturntothedefaultno-pulsefailsafewiththesereceivers,simplyrebindthereceivernormally.

6.ConnectionsandSwitchesontheVariousLemonReceiversTheavailablerangeofLemonreceiverscontinuestoevolve,withemphasisonDSMXcompatibility,butthefollowinginformationshouldbehelpfulevenasthemixchanges.ChecktheLemonRXwebsiteforcurrentlyavailableunits.

Lemonreceivershaveconnections,plugorientationandswitchfunctionidentifiedonthePCboardorcase.Thepositivepinsforallchannels(andthebindslot)areconnectedtogether,asareallthegroundpins;powercanbeappliedtoanysetofpinsandifnecessaryaY-cablecanbeused.

6channelDSM2-compatibleFeatherLight–LM0019/0021/0023

Endpin,straightpinandnopinversionsareavailableandidentical.

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6channelDSM2-compatibleUltraLight–LM0026WithJST-ZH1.5mmpitchconnectors.TheseconnectorsarethesameasSpektrumAR6300Nanolitereceiverstyle.

6channelDSM2-compatibleMicroLight–LM0025WithJST-SH1.0mmpitchconnectors.TheseconnectorsarethesameasSpektrumAR6400Brickstyleforlinearservos.

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6channelDSMX-compatible–LM0027/0034/0028

OnlyuseaDSMX-compatiblesatellitewiththisreceiver.Itisalsoavailableinadiversityantennaversionandpackagedwithasatellite.

7channelDSMX-compatibleStabilizerandStabilizerPLUS–LM0005/00032/0033.0042/0043/0044Seeseparateinstructionsfordetailsofhowtosetupthe7-channelStabilizerandStabilizerPLUS.

OnlyuseaDSMX-compatiblesatellitewiththeStabilizer(thePLUSdoesnothaveasatelliteconnectorandhasabuttoninthatlocationtosetstabilizationmode,usersetfailsafeand“alwayson”mode).

NotethattheStabilizerPLUSmaynotbecompatiblewithcertainRFmodules.

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7channelreceiverswithtelemetryandPPM–LM0041/0052Seeseparateinstructionsfordetailsofhowtosetupthe7-channeltelemetryenabledreceiverswithoptionalPPMoutput.TheLM0052isthelaterversionwithablacklabelandDSMPprotocol.Ithasamorepowerfulprocessorandaddsaninternalbarometerforaltitudeandvariotelemetry.

8and10channelreceivers–LM0015/0016/0017/0018/0040/0003ThesereceivershavebeenmadeinDSM2-compatibleandDSMX-compatibleversions.Useonlythematchingtypeofsatellite.

Onthesereceiversaconnectornexttothebindconnectorislabeled“UART”.Thisisaserialconnectionthatcanprovidedatatootherexternaldevicessuchacontrolleroron-screendisplay.Itisnotusedwherethereceiverstandsalone.Toenablean11mSrefreshrateforhigh-speeddigitalservos,abindplugisinsertedinthisconnectorduringbinding(seebelow).

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Using11mSFrameRateBothDSM2-compatibleandDSMX-compatibleversionsofthe8-channeland10-channelreceiverscanbesettofunctionin11mSmode.Thisshouldonlybedonewhenallservosaredigitalandcapableofan11mSrefreshrate.

1. InsertbindplugsintoboththeBindandUARTconnectorsonthereceiver.2. Providepowertotheunit.TheredLEDshouldflashrapidly.3. Enablebindmodeintransmitter(ensuringadistanceseparationofatleast

3-6feet/1-2metersfromreceiver).4. WhenthereceiverbindsandtheLEDissolid,powerdownandremove

bothbindplugs.5. Everytimefromnowonwhenthereceiverispowered,aquicklyflashing

greenLEDindicates11msframerateisenabled.6. Tocancel11mSmode,rebindnormallywithouttheUARTbindplug.

8channelDSMX-compatiblePPMreceiver–LM0039/0007

Thisreceiverdoesnotallowforconnectionofservosoraspeedcontrol.ItisdesignedtoprovideonlyaPPM(alsocalledcPPM)streamsuitableforusebyaflightcontroller(orinawirelesstrainersystemorflightsimulator).

UsingthePPMstreamwithaFlightControllerThisreceiver,anditsDSM2-compatiblepredecessor,outputschannelpulsesinthesequencesentbythetransmitter,normallyTAER.Itcannotcorrectforincompatibilitiessuchasthatbetweenatransmitter(suchastheSpektrumDX8),whichusesthestandardSpektrumTAERchannelorder,andaflightcontrollersuchasNAZAthatrequirestheso-calledFutabasequenceofAETR.FortransmitterssuchastheSpektrumDX9,FrSkyTaranisorTurnigy9XR,inwhichthechannelassignmentscanbechanged,thisisnotanissue.

TheabilitytoallowtheusertoswitchbetweenTAERandAETRreceiveroutput(giventransmitterchannelorderofTAER)isnowavailableonthe7channelTelemetryenabledDSMPdiversityPPMreceiversLM0041/0052.Seeseparateinstructionsfordetailsofhowtosetupthatreceiver.

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SatelliteReceivers–LM0001/0008/0037TheLemonDSMXandDSM2-compatiblesatelliteslooksimilarbuttheplastichousingismarkedwiththeletters“DSMX”or“DSM2”.Thecorrectsatelliteshouldbeusedwithareceiver.TheDSMXversionisavailablewithshortnon-diversityorlongdiversityantenna.ThepicturebelowshowstheDSMXcompatibletwindiversityantennaversion.Lemonoriginallyprovidedaconnectionwirethatwascolor-codedbutstiff.Theychangedtoanimprovedqualitywirethatisallblack.Theyhavenowchangedagain(Aug2017)toabetterqualitymoreflexiblewirethatiscolor-coded.Forthebenefitofpeoplewhowanttoconnectasatellitedirectlytoaflightcontroller,thesecondpictureshowsthepin-outoftheJST-SHplugontheendofthecablethatplugsintothesatellite.Notethatthesatellitemustbeattachedtothereceiverforbinding.Bothwillshowasolidredlightwhenbound.

NOTICE This manual is provided to help you understand and use the Lemon RX receivers. The authors are not associated with Lemon RX and this is not a Lemon RX publication.

You can freely quote from, redistribute and/or modify this manual; in doing so please acknowledge the source and any changes.

The manual is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. In using this manual, you agree that you accept all responsibility.

For more information on the Lemon RX receivers, see: https://www.rcgroups.com/forums/showthread.php?1773138-Lemon-DSM2-DSMX-Compatible-Receivers

Written by RCGroups users jj604 and Daedalus66

March 2015, February 2016, August 2017

LemonRXmanual_V2.1