Sierra Wireless EM8781 850/900/1800/1900/2100 MHz Multi-band Module User Manual

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2130851Rev 1.0GSM Embedded ModulesHardware Integration Guide Proprietary and ConfidentialEM8780/EM8781

PrefaceRev 1.0 Apr.07 3Limitation of LiabilityTheinformationinthismanualissubjecttochangewithoutnoticeanddoesnotrepresentacommitmentonthepartofSierraWireless.SIERRAWIRELESSANDITSAFFILIATESSPECIFICALLYDISCLAIMLIABILITYFORANYANDALLDIRECT,INDIRECT,SPECIAL,GENERAL,INCIDENTAL,CONSEQUENTIAL,PUNITIVEOREXEMPLARYDAMAGESINCLUDING,BUTNOTLIMITEDTO,LOSSOFPROFITSORREVENUEORANTICIPATEDPROFITSORREVENUEARISINGOUTOFTHEUSEORINABILITYTOUSEANYSIERRAWIRELESSPRODUCT,EVENIFSIERRAWIRELESSAND/ORITSAFFILIATESHASBEENADVISEDOFTHEPOSSIBILITYOFSUCHDAMAGESORTHEYAREFORESEEABLEORFORCLAIMSBYANYTHIRDPARTY.Notwithstandingtheforegoing,innoeventshallSierraWirelessand/oritsaffiliatesaggregateliabilityarisingunderorinconnectionwiththeSierraWirelessproduct,regardlessofthenumberofevents,occurrences,orclaimsgivingrisetoliability,beinexcessofthepricepaidbythepurchaserfortheSierraWirelessproduct.Patents PortionsofthisproductmaybecoveredbysomeorallofthefollowingUSpatents:5,515,013 5,629,960 5,845,216 5,847,553 5,878,2345,890,057 5,929,815 6,169,884 6,191,741 6,199,1686,339,405 6,359,591 6,400,336 6,516,204 6,561,8516,643,501 6,653,979 6,697,030 6,785,830 6,845,2496,847,830 6,876,697 6,879,585 6,886,049 6,968,1716,985,757 7,023,878 7,053,843 7,106,569 D442,170D459,303andotherpatentspending.Thisproductincludes technologylicensedfrom:LicensedbyQUALCOMMIncorporatedunderoneormoreofthefollowingUnitedStatespatentsand/ortheircounterpartsinothernations:4,901,307 5,056,109 5,101,501 5,109,390 5,228,0545,267,261 5,267,262 5,337,338 5,414,796 5,416,7975,490,165 5,504,773 5,506,865 5,511,073 5,535,2395,544,196 5,568,483 5,600,754 5,657,420 5,659,5695,710,784 5,778,338ManufacturedorsoldbySierraWirelessoritslicenseesunderoneormorepatentslicensedfromInterDigitalGroup.Copyright ©2007SierraWireless.Allrightsreserved.

Rev 1.0 Apr.07 5Table of ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7The Lab Adapter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Required connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Guide organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Related documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Power Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Overview of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Power signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Electrostatic discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Module power states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Off state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Normal state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Low power mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Usage models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13RF Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15RF connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Ground connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Antenna and cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Interference and sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Power supply noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Interference from other wireless devices . . . . . . . . . . . . . . . . . . . . . . . . . . 18Device-generated RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

GSM Embedded Modems Hardware Integration Guide62130851Safety and hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Important compliance information for North American users . . . . . . . . . . . 22Acronyms and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1Rev 1.0 Apr.07 71: IntroductionSierraWireless’embeddedmodulesformtheradiocomponentfortheproductsinwhichtheyareembedded.TheembeddedmodulesareavailableforuseonGSMnetworks,andincludetheseproducts:Note: Throughout this document, EM878x refer to the entire suite of GSM embedded modules.•EM8780andEM8781—operate onGSMnetworksusingtheGSM/GPRS/EDGE/UMTS/HSDPAnetworkstandardsPurpose of this guideThisguideaddressesissuesthataffecttheintegrationofSierraWirelessmodulesintohostproducts,andincludesdesignrecommendationsforthehostproducts.Note: An understanding of network technology and experience in integrating hardware components into electronic equipment is assumed.The Lab Adapter BoardSierraWirelessmanufacturesaLabAdapterBoardthatfacili‐tatesallphasesoftheintegrationprocess.TheLabAdapterBoardisahardwaredevelopmentplatformthatisdesignedtosupportmultiplemembersoftheWirelessEmbeddedModuleproductfamily.Itcontainsthehardwarecomponentsthataretypicallynecessaryforevaluatinganddevelopingwiththemodule,including:•LabAdapterBoard•Cables•Antennas•OtheraccessoriesRequired connectorsNote: Contact the vendors before you choose your connectors — the numbers included here are for reference only. Choose connectors that are appropriate to your design.Whenintegratingthesemodulesintoyourhostdevice,youneedthefollowingconnectortypes:•RFcablethatmateswithIPEXMHF‐A13connector(model20428‐001R)•IPEX15pinCABLINEcableconnector(partnumber20347‐015E‐01).•Industry‐standardUSIM/RUIMconnector—theactualconnectoryouusedependsonhowyourdeviceexposesthe

GSM Embedded Modems Hardware Integration Guide82130851USIM/RUIMsocket.Forexample,theUSIM/RUIMconnectorusedontheLabAdapterBoardisanITTCCM03‐3518.Guide organizationThisguideincludesthefollowingsections:1. Introduction(thissection)2. Power Interface(page11) Describespowercontrolsignalsusedbythemoduleanddiscussesdesignissuesrelatedtopowersupplyintegration.3. RF Integration(page15) Describesantennaconnectionmethodsandgroundingissues,RFinterferenceanddesenseissues.4. Regulatory Information(page21) Describesregulatoryapprovalsandregulatoryinformationrequirements.5. Acronyms and Definitions(page23) Listsacronymsanddefinitionsusedthroughoutthisguide.6. Index(page101)Note: The term "host" always refers to the host device.

IntroductionRev 1.0 Apr.07 9Related documentsThisguidedealsspecificallywithhardwareintegrationissuesthatareuniquetotheEM878xmodules.Table1‐1listsotherdocumentsreferencedinthisguide.Table 1-1: Related documentation Document title DescriptionAT Command Set for User Equipment (UE) (Release 6) This 3GPP technical specification describes standard AT commands for GSM / UMTS devices.Download this document (3GPP TS 27.007) from www.3gpp.org.FCC Regulations - Part 15 - Radio Frequency Devices This section of the FCC Code of Federal Regulations, Title 47 deals with radio frequency devices, including shielding requirements for embedded modules.Download this regulation from http://wireless.fcc.gov.IEC-61000-4-2 level 3 Techniques for testing and measuring electrostatic discharge (ESD) immunity.Order this document from www.iec.ch.EM8780/EM8781 Product Specification (Document 2130TBD)Features, mechanical and electrical specifications, and standards compliance of the EM8780 / EM8781.MC87xx Modem CnS Reference (Document 2130602) This document describes the CnS (Control and Status) messages supported by the EM8780/EM8781.MC87xx Modem Extended AT Command Reference (Document 2130616)Proprietary AT commands for the EM878x.Mobile Station (MS) Conformance Specification; Part 4: Subscriber Interface ModuleThis 3GPP technical specification describes SIM testing methods.Download this document (3GPP TS 11.10-4) from www.3gpp.org.UMTS Modems Supported AT Command Reference (Document 2130617)This document describes proprietary, basic AT commands for the EM878x.Universal Serial Bus Specification, Rev 2.0 Download this specification from www.usb.org.

GSM Embedded Modems Hardware Integration Guide10 2130851

2Rev 1.0 Apr.07 11Values in this guide are summarized from the product specification documents (PSDs) - the PSD takes precedence.2: Power InterfaceOverview of operationThemoduleisdesignedtousea5.0V(nominal)powersupply,providedbythehost.Itisthehost’sresponsibilitytoprovidesafeandcontinuouspowertothemoduleatalltimes;themoduledoesNOThaveanindependentpowersupply,orprotectioncircuitstoguardagainstelectricalissues.Themodule’spowerstateiscontrolledbythehost’ssupplyofthe5.0Vpowerrail.Whenthisrailispoweredup,themodemisintheONstate.Whenthisrailispowereddown,themodemisintheOFFstate.Power signalsThemodulemustbeconnectedtoa5.0Vpowersupply.Fordetailedpinoutandvoltage/currentrequirementsofthesemodules,seetheProductSpecificationDocumentforyourembeddedmodule.Electrostatic discharge (ESD)YouareresponsibleforensuringthatthehosthasadequateESDprotectionondigitalcircuitsandantennaports:•(Operational)RFport(antennalaunchandRFconnector):IEC‐61000‐4‐2—Level(ElectrostaticDischargeImmunityTest)•(Non‐operational)Hostconnectorinterface:JESD22‐A114‐B+/‐1kVHumanBodyModelandJESD22‐C101+/‐125VChargedDeviceModelSpecificrecommendationsareprovidedwhereneededinthisguide;however,thelevelofprotectionrequireddependsonyourapplication.Note: ESD protection is highly recommended for the USIM / RUIM connector at the point where the contacts are exposed, and for any other signals from the host interface that would be subjected to ESD by the user of the product.

GSM Embedded Modems Hardware Integration Guide12 2130851Values in this guide are summarized from the product specification documents (PSDs) - the PSD takes precedence.Module power statesNote: The module unit defaults to the Normal state when 5.0V is first applied.Themodulehasthreepowerstates:•Off Nopowertothemodule.•Normal Powerissuppliedtothemodule.Themoduleisactive.Severalmodesarepossible(Receive,Transmit,Sleep,Shutdown).•Low power (“airplane mode”) Powerissuppliedtothemodule.Themoduleisactive,butRFisdisabled.Astatemachineisimplementedinthemoduletomonitortheoperatingtemperature.Off stateThisstateoccurswhenthereisnopowertothemodule—thehostpowersourceisdisconnectedfromthemodule,andallvoltagesassociatedwiththemoduleareat0V.Whetherthehostdeviceisalsopoweredoffdependsonthepowerraildesign.Iftheconnectionbetweenthepowerrailandthemoduleiscontrolledbythehost,thehostcanstaypoweredonandcutthepowertoputthemodemintothedisconnectedstate.Ifthepowerrailissharedbetweenthehostdeviceandthemodule,thehostispoweredoffwhenthemoduleispoweredoff.Normal stateNote: This is the default state when 5.0V is first applied.Thisistheactivestateofthemodule.Inthisstate:•Themoduleisfullypowered.•Themoduleiscapableofplacing/receivingcallsorestab‐lishingdataconnectionsonthewirelessnetwork.•TheUSBinterfaceisfullyactive.Low power modeInthisstate,RF(bothRxandTx)isdisabledinthemodule,buttheUSBinterfaceisstillactive.Thislowpowermode(ʺairplanemodeʺ)iscontrolledbysoftwarecommandsthroughthehostinterface.Forinstructionsonusingthecommands,referto:•ATCommandSetforUserEquipment(UE)(Release6)(+CFUN=0command),

Power InterfaceRev 1.0 Apr.07 13Values in this guide are summarized from the product specification documents (PSDs) - the PSD takes precedence.•MC87xxModemCnSReference(Document2130602)(DisableModemcommand).Usage modelsUsagemodelscanbeusedtocalculateexpectedcurrentconsumption.AsampleusagemodelisprovidedinTable2‐1.Thisexamplemodelappliestoabattery‐operateddevice.Inpractice,becausethemoduleisisolatedfromthebattery(thehostdevicemanagesthepowersource),themAhratingsdependonthedevice’ssupplyefficiency.Themoduleautomaticallyentersslottedsleepmodewhenthereisnotransmissionorreceptionoccurring(SCI=2).Transmitpowerisassumedtobe+3dBm.Table 2-1: Power consumption of a sample application Used by a field worker (data only) Used for remote data loggingUpload (module Tx) 1000 kB/day 40 kB/hDownload (module Rx) 500 kB/day 100 kB/dayCoverage / data rate 1X / 80 kbps IS-95 / 14.4 kbpsHours of operation 8 / day (off 16 hrs / day) 24 / dayTotal power consumed over 24 hours66 mAh 220 mAh

GSM Embedded Modems Hardware Integration Guide14 2130851Values in this guide are summarized from the product specification documents (PSDs) - the PSD takes precedence.

3Rev 1.0 Apr.07 15Values in this guide are summarized from the product specification documents (PSDs) - the PSD takes precedence.3: RF IntegrationTheEM878xoperatesonthefrequenciesdetailedinTable3‐1.RF connectionWhenattachinganantennatothemodule:Note: To disconnect the antenna, make sure you use the IPEX MHF connector removal tool (P/N TBD) to prevent damage to the module or coaxial cable assembly.•UseanIPEXMHFconnector(modelMHFA13‐7G‐113‐60‐SW)toattachanantennatoaconnectionpointonthemodule,asshowninFigure3‐1below.•Matchcoaxialconnectionsbetweenthemoduleandtheantennato50Ω.•MinimizeRFcablelossestotheantenna;therecommendedmaximumcablelossforantennacablingis0.5dB.Table 3-1: EM878x — Supported frequenciesBand Frequencies (MHz)GSM 850 Tx: 824–849 Rx: 869-894EGSM 900 Tx: 880-915 Rx: 925-960DCS 1800 Tx: 1710-1785 Rx: 1805-1880PCS 1900 Tx: 1850-1910 Rx: 1930-1990Band I UMTS 2100 Tx: 1920–1980 Rx: 2110–2170Band II UMTS 1900 Tx: 1850–1910 Rx: 1930–1990Band V UMTS 850 Tx: 824–849 Rx: 869–894

GSM Embedded Modems Hardware Integration Guide16 2130851In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.Figure 3-1: Antenna connection points and mounting tabs/clipGround connectionWhenconnectingthemoduletosystemground:•Preventnoiseleakagebyestablishingaverygoodgroundconnectiontothemodulethroughthehostconnector.•Connecttosystemgroundusingthemountingtabsatthetopandbottomofthemodule(asshowninFigure3‐1onpage16).•MinimizegroundnoiseleakageintotheRF. Dependingonthehostboarddesign,noisecouldpotentiallybecoupledtothemodulefromthehostboard.Thisismainlyanissueforhostdesignsthathavesignalstravelingalongthelengthofthemodule,orcircuitryoperatingatbothendsofthemoduleinterconnects.ShieldingThemoduleisfullyshieldedtoprotectagainstEMIandtoensurecompliancewithFCCPart15‐“RadioFrequencyDevices”(orequivalentregulationsinotherjurisdictions).Note: The module shields must NOT be removed.EM8780/8781:GPS connectorDiversity RF connectorMain RF connectorMounting tabs/clip

RF IntegrationRev 1.0 Apr.07 17Values in this guide are summarized from the product specification documents (PSDs) - the PSD takes precedence.Antenna and cablingNote: Values in this guide are taken from the appropriate product specification documents (PSDs) (listed in Related documents, page 9). In the case of a discrepancy between this document and the relevant PSD, use the value listed in the PSD.Whenselectingtheantennaandcable,itiscriticaltoRFperfor‐mancetomatchantennagainandcableloss.Choosing the correct antenna and cablingConsiderthefollowingpointsforpropermatchingofantennasandcabling:•Theantenna(andassociatedcircuitry)shouldhaveanominalimpedanceof50Ωwithareturnloss≤ 10dBacrosseachfrequencybandofoperation.•Thesystemgainvalueaffectsbothradiatedpowerandregulatory(FCC,IC,CE,etc.)testresults.Developing custom antennasConsiderthefollowingpointswhendevelopingcustom‐designedantennas:•AskilledRFengineershoulddothedevelopmenttoensurethattheRFperformanceismaintained.•Identifythebandsthatneedtobesupported.Determining the antenna’s locationConsiderthefollowingpointswhendecidingwheretoputtheantenna:•AntennalocationmayaffectRFperformance.Althoughthemoduleisshieldedtopreventinterferenceinmostapplica‐tions,theplacementoftheantennaisstillveryimportant—ifthehostdeviceisinsufficientlyshielded,highlevelsofbroadbandorspuriousnoisecandegradethemodule’sperformance.•Connectingcablesbetweenthemoduleandtheantennamusthave50Ωimpedance.Iftheimpedanceofthemoduleismismatched,RFperformanceisreducedsignificantly.•Antennacablesshouldberouted,ifpossible,awayfromnoisesources(switchingpowersupplies,LCDassemblies,etc.).Ifthecablesarenearthenoisesources,thenoisemaybecoupledintotheRFcableandintotheantenna.Disabling the diversity antennaIfyourhostdeviceisnotdesignedtousethemodule’sdiversityantenna,terminatetheinterfacewitha50Ω ohmload.

GSM Embedded Modems Hardware Integration Guide18 2130851In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.Interference and sensitivityNote: These modules are based on ZIF (Zero Intermediate Frequency) technologies; when performing EMC (Electromagnetic Compatibility) tests, there are no IF (Intermediate Frequency) components from the module to consider.SeveralsourcesofinterferencecanaffecttheRFperformanceofthemodule(RFdesense).Commonsourcesincludepowersupplynoiseanddevice‐generatedRF.RFdesensecanbeaddressedthroughacombinationofmitigationtechniquesandradiatedsensitivitymeasurement.Power supply noiseNoiseinthepowersupplycanleadtonoiseintheRFsignal.Note: Values in this guide are taken from the appropriate product specification documents (PSDs) (listed in Related documents, page 9). In the case of a discrepancy between this document and the relevant PSD, use the value listed in the PSD.Thepowersupplyripplelimitforthemoduleisnomorethan200mVp‐p1Hzto100kHz.Thislimitincludesvoltagerippleduetotransmitterburstactivity.Interference from other wireless devicesWirelessdevicesoperatinginsidethehostdevicecancauseinterferencethataffectsthemodule.Todeterminethemostsuitablelocationsforantennasonyourhostdevice,evaluateeachwirelessdevice’sradiosystem,consideringthefollowing:•Anyharmonics,sub‐harmonics,orcross‐productsofsignalsgeneratedbywirelessdevicesthatfallinthemodule’sRxrangemaycausespuriousresponse,resultingindecreasedRxperformance.•TheTxpowerandcorrespondingbroadbandnoiseofotherwirelessdevicesmayoverloadorincreasethenoisefloorofthemodule’sreceiver,resultinginRxdesense.Theseverityofthisinterferencedependsontheclosenessoftheotherantennastothemodule’santenna.Todeterminesuitablelocationsforeachwirelessdevice’santenna,thoroughlyevaluateyourhostdevice’sdesign.

RF IntegrationRev 1.0 Apr.07 19Values in this guide are summarized from the product specification documents (PSDs) - the PSD takes precedence.Device-generated RFNote: The module can cause interference with other devices such as hearing aids and on-board speakers. Wireless devices such as the embedded module transmit in bursts (pulse transients) for set durations (RF burst frequencies). Hearing aids and speakers convert these burst frequencies into audible frequencies, resulting in audible noise. AllelectroniccomputingdevicesgenerateRFinterferencethatcannegativelyaffectthereceivesensitivityofthemodule(RFdesense).TheproximityofhostelectronicstotheantennainwirelessdevicescancontributetoRFdesense.ComponentsthataremostlikelytocauseRFdesenseinclude:•Microprocessorandmemory•Displaypanelanddisplaydrivers•Switching‐modepowersuppliesTheseandotherhigh‐speeddevices(inparticular,theprocessor)cancauseRFdesensebecausetheyrunatfrequenciesoftensofMHz.Therapidriseandfalloftheseclocksignalsgenerateshigher‐orderharmonicsthatoftenfallwithintheoperatingfrequencybandofthemodule,causingRFdesense.ExampleOnasub‐systemrunningat40MHz,the22ndharmonicfallsat880MHz,whichiswithinthecellularreceivefrequencyband.Note: In practice, there are usually numerous interfering frequencies and harmonics. The net effect can be a series of desensitized receive channels.

GSM Embedded Modems Hardware Integration Guide20 2130851In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.

4Rev 1.0 Apr.07 214: Regulatory InformationImportant noticeBecauseofthenatureofwirelesscommunications,trans‐missionandreceptionofdatacanneverbeguaranteed.Datamaybedelayed,corrupted(i.e.,haveerrors)orbetotallylost.AlthoughsignificantdelaysorlossesofdataarerarewhenwirelessdevicessuchastheSierraWirelessmodemareusedinanormalmannerwithawell‐constructednetwork,theSierraWirelessmodemshouldnotbeusedinsituationswherefailuretotransmitorreceivedatacouldresultindamageofanykindtotheuseroranyotherparty,includingbutnotlimitedtopersonalinjury,death,orlossofproperty.SierraWirelessanditsaffiliatesacceptnoresponsibilityfordamagesofanykindresultingfromdelaysorerrorsindatatransmittedorreceivedusingtheSierraWirelessmodem,orforfailureoftheSierraWirelessmodemtotransmitorreceivesuchdata.Safety and hazardsDonotoperateyourEM8780/EM8781modem:•Inareaswhereblastingisinprogress•Whereexplosiveatmospheresmaybepresentincludingrefuellingpoints,fueldepots,andchemicalplants•Nearmedicalequipment,lifesupportequipment,oranyequipmentwhichmaybesusceptibletoanyformofradiointerference.Insuchareas,theEM8780/EM8781modemMUSTBEPOWEREDOFF.Otherwise,theEM878xmodemcantransmitsignalsthatcouldinterferewiththisequipment.Inanaircraft,theEM8780/EM8781modemMUSTBEPOWEREDOFF.Otherwise,theEM8780/EM8781modemcantransmitsignalsthatcouldinterferewithvariousonboardsystemsandmaybedangeroustotheoperationoftheaircraftordisruptthecellularnetwork.Useofacellularphoneinanaircraftisillegalinsomejurisdictions.Failuretoobservethisinstructionmayleadtosuspensionordenialofcellulartelephoneservicestotheoffender,orlegalactionorboth.Someairlinesmaypermittheuseofcellularphoneswhiletheaircraftisonthegroundandthedoorisopen.TheEM8780/EM8781modemmaybeusednormallyatthistime.

GSM Embedded Modems Hardware Integration Guide22 2130851Important compliance information for North American usersTheEM8780/EM8781modemhasbeengrantedmodularapprovalformobileapplications.IntegratorsmayusetheEM8780/EM8781modemintheirfinalproductswithoutadditionalFCC/IC(IndustryCanada)certificationiftheymeetthefollowingconditions.Otherwise,additionalFCC/ICapprovalsmustbeobtained.1. Atleast20cmseparationdistancebetweentheantennaandtheuser’sbodymustbemaintainedatalltimes.2. TocomplywithFCC/ICregulationslimitingbothmaximumRFoutputpowerandhumanexposuretoRFradiation,themaximumantennagainincludingcablelossinamobile‐onlyexposureconditionmustnotexceed:·5dBiintheCellularbandand4dBiinthePCSbandfortheEM8780/EM8781modem3. TheEM8780/EM8781modemanditsantennamustnotbeco‐locatedoroperatinginconjunctionwithanyothertransmitterorantennawithinahostdevice.4. AlabelmustbeaffixedtotheoutsideoftheendproductintowhichtheEM8780/EM8781modemisincorporated,withastatementsimilartothefollowing:·ForEM8780: ThisdevicecontainsFCCID:N7NEM8780·ForEM8781: ThisdevicecontainsFCCID:N7NEM8781 ThisequipmentcontainsequipmentcertifiedunderIC:2417C‐EM87815. AusermanualwiththeendproductmustclearlyindicatetheoperatingrequirementsandconditionsthatmustbeobservedtoensurecompliancewithcurrentFCC/ICRFexposureguidelines.TheendproductwithanembeddedEM8780/EM8781modemmayalsoneedtopasstheFCCPart15unintentionalemissiontestingrequirementsandbeproperlyauthorizedperFCCPart15whereapplicable.Note:Ifthismoduleisintendedforuseinaportabledevice,youareresponsibleforseparateapprovaltosatisfytheSARrequirementsofFCCPart2.1093andICRSS‐102.

ARev 1.0 Apr.07 23A: Acronyms and Definitions.Table A-1: Acronyms and definitionsAcronym or term DefinitionBER Bit Error Rate — a measure of receive sensitivityBLER Block Error RatedB Decibel = 10 x log10 (P1/P2) P1 is calculated power; P2 is reference powerDecibel = 20 x log10 (V1/V2) V1 is calculated voltage, V2 is reference voltagedBm Decibels, relative to 1 mW - Decibel(mW) = 10 x log10 (Pwr (mW)/1mW)EDGE Enhanced Data rates for GSM EvolutionEM Embedded ModuleEM8780/EM8781 Sierra Wireless embedded modules used on GSM networksESD ElectroStatic DischargeGPRS General Packet Radio ServicesGPS Global Positioning System — a system that uses a series of 24 geosynchronous satellites to provide navigational data.GSM Global System for Mobile communicationsHSDPA High Speed Download Packet Access. An add-on data service to GSM mobile phone networks.Hz Hertz = 1 cycle/secondIS-95 2G radio standards targeted for voice (cdmaONE)MHz MegaHertz = 10E6 Hertz (Hertz = 1 cycle/second)PCS Personal Communication System — PCS spans the 1.9 GHz radio spectrumRF Radio FrequencyRUIM Removable User Identity ModuleSCI Slot Cycle IndexSensitivity (RF) Measure of lowest power signal at the receiver input that can provide a prescribed BER/BLER/SNR value at the receiver output.

GSM Embedded Modems Hardware Integration Guide24 2130851SIM Subscriber Identity ModuleSNR Signal to Noise RatioUMTS Universal Mobile Telecommunications System. See also WCDMA.USB Universal Serial BusUSIM Universal Subscriber Identity ModuleWCDMA Wideband Code Division Multiple Access. In this document, the term “UMTS” is used instead of “WCDMA”.Table A-1: Acronyms and definitionsAcronym or term Definition

Rev 1.0 Apr.07 25IndexAacronymsanddefinitions 23–24airplanemode 12antennaconnectionandmountingpoints 16connectionconsiderations 15custom,considerations 17diversityantenna,disabling 17limit,matchingcoaxialconnections 15location,considerations 17matching,considerations 17maximumcableloss 15ATcommands3GPPspecification,details 9lowpowermode,setting 12ATcommands,extendedEM878x,reference 9ATcommands,standardEM878x,reference 9Ccablelossantenna,maximum 15CnSEM878xreference 9connectiongrounding 16connectors,requiredhost‐module 7–8RF,IPEX 7USIM/RUIM 7currentconsumption 13usagemodels 13DDCS1800RFparameters,EM878x 15desense.SeeRFdiversityantennadisabling 17EEGSM900RFparameters,EM878x 15electrostaticdischarge.SeeESDEM878xATreference(extended) 9ATreference(standard) 9CnSreference, 9productspecification 9RFparameters 15ESDprotectionrequirements 11testingtechniquesdocument(IEC‐61000‐4‐2) 9FFCCregulations,relevantsection 9Ggroundingconnectionconsiderations 16GSM850RFparameters,EM878x 15Iimpedancemodule‐antenna 17interferencedevicegenerated 19powersupplynoise 18wirelessdevices 18LLabAdapterBoard 7lowpowermodesetting,ATcommands 12lowpower,modulepowerstate 12Mmodulepowerstates 12Nnoiseleakage,minimizing 16RFinterference,powersupply 18normal,modulepowerstate 12Ooff,modulepowerstate 12

GSM Embedded Modems Hardware Integration Guide26 2130851PPCS1900RFparameters,EM878x 15powerdefaultstate 12disconnected,characteristics 12normal,characteristics 12signals,overview 11state,lowpower 12state,normal 12state,off 12supply,RFinterference 18supply,ripplelimit 18powerinterface 11–13PSDEM878x 9Rregulatoryinformation 21–22FCC 22limitationofliability 21safetyandhazards 21RFantennacableloss,maximum 15antennaconnection,considerations 15cabletype,required 7desensedevice‐generated 19integration 15–19interferenceotherdevices 19powersupply 18wirelessdevices 18parametersDCS1800 15EGSM900 15EM878x 15GSM850 15PCS1900 15UMTS1900 15UMTS2100 15UMTS850 15Sshieldingmodule,compliance 16SIMtestingmethods,MSconformancespecification 9SIM.SeeUSIM/RUIMTtestingESDimmunity,techniquesdocument(IEC‐61000‐4‐2) 9UUMTS1900RFparameters,EM878x 15UMTS2100RFparameters,EM878x 15UMTS850RFparameters,EM878x 15UniversalSerialBus.SeeUSBusagemodelscurrentconsumption 13USBspecification 9USIM/RUIMconnectortype,required 7ZZIF(ZeroIntermediateFrequency) 18

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