Sierra Wireless MC5725 Installation instructions

2130114
Rev 1.8.1
CDMA and GSM / UMTS Mini Card
Hardware Integration Guide
Proprietary and Confidential
Includes:
MC5725 / MC5725V
MC5727 / MC5727V
MC8775 / MC8775V
MC8780 / MC8781
MC8785V
MC8790

Preface
Rev 1.8.1 May.08 Proprietary and Confidential 1
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Important Notice Duetothenatureofwirelesscommunications,transmission
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
accepts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 Hazards DonotoperatetheSierraWirelessmodeminareaswhere
blastingisinprogress,whereexplosiveatmospheresmaybe
present,nearmedicalequipment,nearlifesupportequipment,
oranyequipmentwhichmaybesusceptibletoanyformof
radiointerference.Insuchareas,theSierraWirelessmodem
MUSTBEPOWEREDOFF.TheSierraWirelessmodemcan
transmitsignalsthatcouldinterferewiththisequipment.
DonotoperatetheSierraWirelessmodeminanyaircraft,
whethertheaircraftisonthegroundorinflight.Inaircraft,the
SierraWirelessmodemMUSTBEPOWEREDOFF.When
operating,theSierraWirelessmodemcantransmitsignalsthat
couldinterferewithvariousonboardsystems.
Note: Some airlines may permit the use of cellular phones while the
aircraft is on the ground and the door is open. Sierra Wireless
modems may be used at this time.
Thedriveroroperatorofanyvehicleshouldnotoperatethe
SierraWirelessmodemwhileincontrolofavehicle.Doingso
willdetractfromthedriveroroperatorʹscontrolandoperation
ofthatvehicle.Insomestatesandprovinces,operatingsuch
communicationsdeviceswhileincontrolofavehicleisan
offence.
Limitation of
Liability
The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

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
2 Proprietary and Confidential 2130114
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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 5,878,234
5,890,057 5,929,815 6,169,884 6,191,741 6,199,168
6,339,405 6,359,591 6,400,336 6,516,204 6,561,851
6,643,501 6,653,979 6,697,030 6,785,830 6,845,249
6,847,830 6,876,697 6,879,585 6,886,049 6,968,171
6,985,757 7,023,878 7,053,843 7,106,569 7,145,267
7,200,512 D442,170 D459,303
and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 5,228,054
5,267,261 5,267,262 5,337,338 5,414,796 5,416,797
5,490,165 5,504,773 5,506,865 5,511,073 5,535,239
5,544,196 5,568,483 5,600,754 5,657,420 5,659,569
5,710,784 5,778,338
ManufacturedorsoldbySierraWirelessoritslicenseesunder
oneormorepatentslicensedfromInterDigitalGroup.
Copyright ©2008SierraWireless.Allrightsreserved.
Trademarks AirCard®and“HeartoftheWirelessMachine®”areregistered
trademarksofSierraWireless.Watcher®isatrademarkof
SierraWireless,registeredintheEuropeanCommunity.
SierraWireless,theSierraWirelesslogo,theredwavedesign,
andthered‐tippedantennaaretrademarksofSierraWireless.
Windows®isaregisteredtrademarkofMicrosoftCorporation.
QUALCOMM
®
3G

Preface
Rev 1.8.1 May.08 Proprietary and Confidential 3
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
QUALCOMM®isaregisteredtrademarkofQUALCOMM
Incorporated.Usedunderlicense.
Othertrademarksarethepropertyoftherespectiveowners.
Contact
Information
Consultourwebsiteforup‐to‐dateproductdescriptions,
documentation,applicationnotes,firmwareupgrades,trouble‐
shootingtips,andpressreleases:
www.sierrawireless.com
Sales Desk: Phone: [phone]
Hours: 8:00 AM to 5:00 PM Pacific Time
E-mail: [email protected]
Post: Sierra Wireless
13811 Wireless Way
Richmond, BC
Canada V6V 3A4
Fax: [phone]
Web: www.sierrawireless.com

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
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Rev 1.8.1 May.08 Proprietary and Confidential 5
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
The Universal Development Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Required connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Guide organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Related documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Overview of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Electrostatic discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Module power states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Disconnected state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Off state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Normal state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Low power mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Usage models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
RF Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
RF connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Ground connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Antenna and cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Interference and sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power supply noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Interference from other wireless devices . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Device-generated RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Host / Module Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

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LED output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Safety and hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Important compliance information for North American users . . . . . . . . . . . 24
EU regulatory conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Acronyms and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

1
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1: Introduction
SierraWireless’MiniCardmodulesformtheradiocomponent
fortheproductsinwhichtheyareembedded.MiniCardsare
availableforuseonCDMAandGSMnetworks,including:
Note: Throughout this
document, MC57xx and MC87xx
refer to the entire suites of
CDMA and GSM Mini Cards
respectively.
•MC5725/MC5725V/MC5727/MC5727V—OperateonCDMA
networksusingtheCDMAIS‐95A,1X,and1xEV‐DO(IS‐
856)networkstandards,andsupportGPS.
•MC8775 / MC8775V—operateonGSMnetworksusingthe
GSM/GPRS/EDGE/UMTS/HSDPAnetworkstandards,
andsupportStandaloneGPSfunctionality.
•MC8780 / MC8781 / MC8785V / MC8790—operateonGSM
networksusingtheGSM/GPRS/EDGE/UMTS/HSDPA/
HSUPAnetworkstandards,andsupportStandaloneGPS,
gpsOneXTRA™,A‐GPS,selectedenhancedNavigation2.0
features,andfiveNMEAsentences.
Purpose of this guide
This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 Universal Development Kit
SierraWirelessmanufacturesaUniversalDevelopmentKit
(UDK)thatfacilitatesallphasesoftheintegrationprocess.
Thiskit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:
•Developmentboard
•Cables
•Antennas
•Otheraccessories.

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Required connectors
Note: Contact vendors before
choosing 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cablesthatmatewithHiroseU.FLconnectors(model
U.FL#CL331‐0471‐0‐10).
•Industry‐standardmatingconnectorfor52‐pinEDGE—
somemanufacturersincludeTyco,Foxconn,andMolex.For
example,theconnectorusedontheMiniCardDevKit
boardisaMolex67910‐0001.
•Industry‐standardUSIMconnector(MC87xxonly)—the
actualconnectoryouusedependsonhowyourdevice
exposestheUSIMsocket.Forexample,theUSIMconnector
usedontheMiniCardDevKitboardisanITTCCM03‐
3518.
Guide organization
Thisguideincludesthefollowingsections:
1. Introduction(thissection)
2. Power Interface(p.11)
Describespowercontrolsignalsusedbythemoduleand
discussesdesignissuesrelatedtopowersupply
integration.
3. RF Integration(p.15)
Describesantennaconnectionmethodsandgroundingissues,
RFinterferenceanddesenseissues.
4. Host / Module Interfaces(p.21)
DescribestheUSBinterfaceforhost/modulecommunication,
andtheUSIMinterfaceforhost/moduleintegration.
5. Regulatory Information(p.23)
Describesregulatoryapprovalsandregulatoryinformation
requirements.
6. Acronyms and Definitions(p.27)
Listsacronymsanddefinitionsusedthroughoutthisguide.
7. Index(p.31)
Note: The term "host" always refers to the host device.
Related documents
Thisguidedealsspecificallywithhardwareintegrationissues
thatareuniquetotheMC57xxandMC87xxmodules.
Table1‐1listsotherdocumentsreferencedinthisguide.

Introduction
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Table 1-1: Related documentation
Document title Description
AT Command Set for User
Equipment (UE) (Release 6) Standard AT commands for GSM / UMTS devices.
Download this document (3GPP TS 27.007) from
www.3gpp.org.
CDMA 1X Standard Technical requirements for CDMA systems, including
details on sleep cycle index (SCI) values.
Order this document, CDMA 2000 Series Release A
(2000) (document # TIA/EIA/IS-2000 Series, Release A)
from www.tiaonline.org.
AirCard595U/595/MC5725/
MC5725V MiniCard CnS
Reference (Document
2130754)
CnS (Control and Status) messages that are supported by
the MC5725 / MC5725V
AirCard 595U/595, EM5625
Embedded Module, MC5720/
MC5725/MC5725V MiniCard AT
Command Reference
(Document 2130620)
Proprietary, basic AT commands for the MC5725 /
MC5725V / MC5727 / MC5727V. For MC8775 / 8775V /
8780 / 8781 / 8785V-specific commands, see UMTS
Modems Supported AT Command Reference (Document
2130617).
AirCard595U/595, EM5625
Embedded Module, MC5720/
MC5725/MC5725V MiniCard
Extended AT Command
Reference (Document
2130621)
Proprietary AT commands for the MC5725 / MC5725V /
MC5727 / MC5727V. For MC8775 / 8775V / 8780 / 8781 /
8785V-specific commands, see MC87xx Modem
Extended AT Command Reference (Document 2130616).
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.
MC5725 Mini Card Product
Specification (Document
2130663)
Features, mechanical and electrical specifications, and
standards compliance of the MC5725.
MC5725V Mini Card Product
Specification (Document
2130671)
Features, mechanical and electrical specifications, and
standards compliance of the MC5725V.
MC8775 PCI Express Mini Card
Product Specification
(Document 2130697)
Features, mechanical and electrical specifications, and
standards compliance of the MC8775.

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
10 Proprietary and Confidential 2130114
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MC8775V with Audio PCI
Express Mini Card Product
Specification (Document
2130700)
Features, mechanical and electrical specifications, and
standards compliance of the MC8775V.
MC8780 / MC8781 PCI Express
Mini Card Product
Specification (Document
2130782)
Features, mechanical and electrical specifications, and
standards compliance of the MC8780 / MC8781.
MC8785V PCI Express Mini
Card Product Specification
(Document 2130932)
Features, mechanical and electrical specifications, and
standards compliance of the MC8785V.
MC8790 PCI Express Mini Card
Product Specification
(Document 2111279)
Features, mechanical and electrical specifications, and
standards compliance of the MC8790.
MC87XX Modem CnS
Reference (Document
2130602)
CnS (Control and Status) messages supported by the
MC8775 / MC8775V / MC8780 / MC8781.
MC87xx Modem CnS Reference
(Voice) (Document 2130817) Voice-related CnS (Control and Status) messages
supported by the MC8755V and MC8775V.
UMTS Modems Supported AT
Command Reference
(Document 2130617)
Proprietary, basic AT commands for the MC87xx. For
MC57xx-specific commands, see the AirCard 595U/595,
EM5625 Embedded Module, MC5720/MC5725/MC5725V
MiniCard AT Command Reference (Document 2130620).
MC87xx Modem Extended AT
Command Reference
(Document 2130616)
Proprietary AT commands for the MC87xx. For MC57xx-
specific commands, see the AirCard595U/595, EM5625
EmbeddedModule,MC5720/MC5725/MC5725VMiniCard
Extended AT Command Reference (Document 2130621).
Mobile Station (MS)
Conformance Specification;
Part 4: Subscriber Interface
Module
SIM testing methods.
Download this document (3GPP TS 11.10-4) from
www.3gpp.org.
PCI Express Mini Card Dev Kit
Quick Start Guide (Document
2130705)
Setup and configuration of modules.
PCI Express Mini Card
Electromechanical
Specification Revision 1.1
Download this document from www.pcisig.com.
Universal Serial Bus
Specification, Rev 2.0 Download this specification from www.usb.org.
Table 1-1: Related documentation (Continued)
Document title Description

2
Rev 1.8.1 May.08 Proprietary and Confidential 11
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
2: Power Interface
Overview of operation
Note: This chapter contains information for CDMA (MC57xx) and
GSM (MC87xx) modules.
Information that is unique to specific module types is clearly
identified.
Themoduleisdesignedtousea3.3V(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assertion/
de‐assertionoftheW_Disable#signal.Themodulealso
monitorsitssupplyvoltageandrequestsshutdownifthe
supplyisinsufficient.
Power signals
Themodulemustbeconnectedtoa3.3Vpowersupply(as
describedinPCIExpressMiniCardElectromechanicalSpecifi‐
cationRevision1.1).
TheMC87xxhasmorepowerpinsthantheMC57xxdueto
higherpeakcurrentrequirementsforGSMdevices.
Fordetailedpinoutandvoltage/currentrequirementsofthese
modules,seetheProductSpecificationDocumentforyour
MiniCard.
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Model
Specificrecommendationsareprovidedwhereneededinthis
guide,however,thelevelofprotectionrequireddependson
yourapplication.

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
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Note: ESD protection is highly recommended for the USIM 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.
Module power states
Note: The module unit defaults
to the Normal state when
VCC3.3 is first applied in the
absence of W_Disable# control.
Themodulehasfourpowerstates:
•Disconnected
Nopowertothemodule.
•Off
Powertothemodule,butthemoduleispoweredoff.
•Normal
Themoduleisactive.Severalmodesarepossible(Receive,
Transmit,Sleep,Shutdown).
•Low power (“airplane mode”)
Themoduleisactive,butRFisdisabled.
Statemachinesareimplementedinthemoduletomonitorthe
powersupplyandoperatingtemperature.
Disconnected state
Note: The difference between
the Disconnected and Off states
is that, in the Off state, the
module is still connected to the
power source and draws minimal
current.
This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.
Off state
Inthisstate,thehostispoweredupandthemoduleis
powereddown(butstillconnectedtothepowersource).
Thehostkeepsthemodulepoweredoffbydrivingthe
W_Disable#signallow.Inthisstate,themoduledrawsminimal
current.

Power Interface
Rev 1.8.1 May.08 Proprietary and Confidential 13
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Normal state
Note: This is the default state
when VCC3.3 is first applied in
the absence of W_Disable#
control.
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 mode
In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),
AirCard595U/595/MC5725/MC5725VMiniCardCnSReference
(Document2130754)(CNS_RADIO_POWER[0x1075]
command),orMC87XXModemCnSReference(Document
2130602)(DisableModemcommand).
Usage models
Usage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.
Table 2-1: Power consumption of a sample application
Used by a field worker
(data only) Used for remote data logging
Upload(module
Tx) 1000 kB/day 40 kB/h
Download
(module Rx) 500 kB/day 100 kB/day
Coverage/data
rate 1X / 80 kbps IS-95 / 14.4 kbps
Hours of
operation 8/day (off 16 hrs/day) 24/day
Total power
consumed over
24 hours
60 mAh 200 mAh

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
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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.

3
Rev 1.8.1 May.08 Proprietary and Confidential 15
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
3: RF Integration
TheMC87xxoperatesonthefrequenciesdetailedinTable3‐1.
RF connection
Whenattachinganantennatothemodule:
Note: To disconnect the
antenna, make sure you use the
Hirose U.FL connector removal
tool (P/N UFL-LP-N-2(01)) to
prevent damage to the module
or coaxial cable assembly.
•UseaHiroseU.FLconnector(model
U.FL#CL331‐0471‐0‐10)toattachanantennatoa
connectionpointonthemodule,asshowninFigure3‐1(the
mainRFconnectoronthetopside;thediversityRForGPS
connectoronthebottomside).
•Matchcoaxialconnectionsbetweenthemoduleandthe
antennato50Ω.
Table 3-1: MC87xx — Supported frequencies
Product Band Frequencies
(MHz)
MC8775
MC8775V
MC8780
MC8781
MC8785V
MC8790
GSM 850 Tx: 824–849
Rx: 869-894
EGSM 900 Tx: 880-915
Rx: 925-960
DCS 1800 Tx: 1710-1785
Rx: 1805-1880
PCS 1900 Tx: 1850-1910
Rx: 1930-1990
MC8775
MC8775V
MC8780
MC8781
MC8785V
MC8790
Band I
UMTS 2100 Tx: 1920–1980 Rx: 2110–2170
MC8775
MC8775V
MC8780
MC8781
MC8785V
MC8790
Band II
UMTS 1900 Tx: 1850–1910 Rx: 1930–1990
Band V
UMTS 850 Tx: 824–849 Rx: 869–894
MC8775V
MC8780
MC8781
MC8785V
MC8790
GPS Rx: 1575.42

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
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•MinimizeRFcablelossestotheantenna;therecommended
maximumcablelossforantennacablingis0.5dB.
Figure 3-1: Antenna connection points and mounting holes
Ground connection
When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twomountingholesat
thetopofthemodule(asshowninFigure3‐1).
•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.
Shielding
The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).

RF Integration
Rev 1.8.1 May.08 Proprietary and Confidential 17
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Note: The module shields must NOT be removed.
Antenna and cabling
Note: Values in this guide are
taken from the appropriate
product specification documents
(PSDs) (listed in
Related
documents , page 8) — 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 cabling
Consider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 antennas
Consider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,particularly
whenboththeMC57xxandMC87xxwillbeinstalledinthe
sameplatform.Inthiscase,youmaywanttodevelop
separateantennasformaximumperformance.
Determining the antenna’s location
Consider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.

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
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Disabling the diversity antenna
•MC57xx—Ifyourhostdeviceisnotdesignedtousethe
MC57xxmodule’sdiversityantenna,terminatetheinterface
witha50Ωload.
•MC8780/MC8781/MC8785V/MC8790—UsetheAT
command!RXDEN=0todisablereceivediversityor
!RXDEN=1toenablereceivediversity.
Interference and sensitivity
Note: 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 noise
Noise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 8) — 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 devices
Wireless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.