AnyDATA EMII-1900 User manual

Interface DescriptionEMII-1900 Service Manual ApplicationInformation
EMII-1900 V1.0 AnyDATA.NET Proprietary Use Subject to Restrictions
1.9GCDMA Wireless Kit
EMII-1900
AnyDATA.NET Inc.
HanvitBank B/D 6F
Byulyang-dongKwachon
KOREA
Tel) 82-2-504-3360
Fax) 82-2-504-3362
SERVICE MANUAL

Interface DescriptionEMII-1900 Service Manual ApplicationInformation
EMII-1900 V1.0 AnyDATA.NET Proprietary Use Subject to Restrictions
Introduction
The EMII-1900 is designedforthetest andsimulation ofthe CDMAwireless data communications. User can
connect the EMII-1900 to yourPC orNotebook and easilytest the wireless communications. User can use this
todevelopyour applications software even beforeuser sown hardware is ready.It alsocan be used as a
debugging duringuser s hardware test.
Disclaimerand Limitation of Liability
AnyDATA.NETInc. assumes no responsibilityforany damageorloss resultingfromthe misuse ofits products.
AnyDATA.NETInc. assumes noresponsibilityforany loss orclaimsbythirdparties, which mayarise through
the use ofits products. AnyDATA.NETInc. assumes no responsibilityforanydamageorloss caused bythe
deletion or loss of data as a result ofmalfunctions or repairs.
The informationdisclosed herein is the exclusive propertyofAnyDATA.NET Inc. and nopart ofthis publication
maybe reproduced ortransmitted inany formor byany means includingelectronic storage, reproduction,
adaptation , translation , execution or transmissionwithout the prior writtenconsent ofAnyDATA.NETInc.
The informationcontained in this document is subject to change without notice.
FCC RF ExposureInformation
Warning! Read this information before usingthis device.
InAugust 1996theFederal Communications Commission(FCC) ofthe United States withits
actionin Reportand Order FCC96-326adopted anupdatedsafetystandard forhuman
exposureto radio frequencyelectromagnetic energyemittedbyFCCregulated transmitters.
Those guidelines are consistent with the safetystandard previouslyset byboth U.S. and
international standards bodies. Thedesignofthis device complies with theFCCguidelines and
these international standards.

Interface DescriptionEMII-1900 Service Manual ApplicationInformation
EMII-1900 V1.0 AnyDATA.NET Proprietary Use Subject to Restrictions
CAUTION
n Operating Requirements
The user cannot make anychanges or modifications notexpresslyapproved bythe partyresponsible for
compliance, otherwise it could void the user's authorityto operate the equipment.
Tosatisfy FCC RF exposure compliance requirements foramobile transmittingdevice, this device and
its antenna shouldgenerallymaintaina separationdistance of20cmor more froma person s body.
Specialaccessories
Inorder toensurethis device in compliance with FCCregulation,the special accessories are providedwith this
device and must beused with the device only. Theuser is notallowedtouse any otheraccessories than the
special accessories given with this device

Interface DescriptionEMII-1900 Service Manual ApplicationInformation
EMII-1900 V1.0 AnyDATA.NET Proprietary Use Subject to Restrictions
Table of Contents
GeneralIntroduction
................................................................................................................................ 2
CHAPTER 1. System Introduction
1. System Introduction .................................................................................................... 3
2. Features and Advantages of CDMA Module ........................................................... 4
3. Structure and Functions of CDMA Module ............................................................. 7
4. Specification ............................................................................................................... 8
CHAPTER 2. NAM InputMethod(Inputtingof telephone numbers included)
1. NAM ProgrammingMethod and Telephone Number Input Method ......................... 11
CHAPTER 3. Circuit Description
1. Overview.................................................................................................................... 14
2. RFTransmit/Receive Part ........................................................................................ 14
3. Digital/Voice ProcessingPart ......................................................................... ®®.. 17
CHAPTER 4. FCC Notice
Appendix
.............................................................................................................................. 22
1. Assemblyand DisassemblyDiagram
2. Block &Circuit Diagram
3. Part List
4. ComponentLayout

Interface DescriptionEMII-1900 Service Manual ApplicationInformation
EMII-1900 V1.0 AnyDATA.NET Proprietary Use Subject to Restrictions
The EMII-1900 functionsdigitalcellular moduleworked in CDMA (Code Division Multiple Access)
mode.CDMA type digitalmodeapplies DSSS (Direct SequenceSpread Spectrum) modewhichis
usedin military.
Thisfeatureenables the phone to keepcommunication from being crossed anduseone frequency
channelbymultiple usersin the samespecificarea,resulting that itincreasesthe capacity10times
morecompared with that in the analog modecurrentlyused.
Soft/SofterHandoff, Hard Handoff, andDynamic RF power Controltechnologiesare combinedinto
this phone to reducethe callbeinginterruptedin a middleof talking overphone.
CDMA digital cellularnetworkconsistsof MSC (MobileSwitching Office), BSC (BaseStation
Controller), BTS (Base station Transmission System), andMS (Mobile Station). Communication
betweenMS andBTS is designed tomeet thespecification of IS-95A (CommonAir Interface). MS
meets the specifications of thebelow :
-IS-95A ( CommonAir Interface ) :Protocolbetween MS andBTS
-IS-96A ( Vocoder ) : Voice signal coding
-IS-98:BasicMS functions
-IS-126 : Voice loopback
-IS-99:Short Message Service, Async Data Service, and G3 FaxService
EMII-1900 is digitalmodeis designedtobe operatedinfull duplex.
General Introduction

EMII-1900
1.SystemIntroduction
1.1 CDMAAbstract
Thecellular systemhas achannel hand-offfunctionthat is usedforcollectingtheinformationon the locations and movements
ofradio mobile telephones fromthe cell site byautomaticallycontrollingseveral cell site through the setup ofdata transmission
routes and thus, enabling oneswitchingsystemtocarryout the automatic remote adjustment. This is to maintaincontinuously
thecall state throughtheautomatic location confirmationand automatic radiochannel conversion when the busysubscriber
moves fromtheservice area ofone cell site tothat of another byusingautomatic location confirmationand automatic radio
channel conversion functions. Thecall state can be maintainedcontinuouslybythe information exchangebetween switching
systems when the busysubscriber moves fromone cellular systemarea tothe othercellularsystem area.
In thecellular system,thecell site is asmall-sized lowoutput type and utilizes afrequencyallocationsystemthat considers
mutual interference, in aneffort toenable the re-use ofcorrespondingfrequencyfromacell site separatedmore than acertain
distance. The analog cellularsystemsare classifiedfurther into an AMPS system,E-AMPS System,NMTsystem,ETACS
system, andJTACS systemdepending on technologies used.
Unlike the timedivision multiple access (TDMA)or frequencydivision multiple access (FDMA)usedin the band limited
environment, the Code DivisionMultiple Access(CDMA)systemwhichis one of digital cellular systemsis amulti-access
technology under the interference limitedenvironment. It can process morenumberofsubscriberscomparedto other systems
(TDMA system has theprocessingcapacitythree times greaterthan theexistingFDMAsystemwhereas CDMAsystem,about
12~15 times ofthat of the existing system).
CDMAsystemcanbe explained as follows: TDMA or SDMA canbe used toenable eachperson to talk alternatelyor provide a
separate roomforeachperson when twopersons desire to talkwitheach other at thesame time, whereas FDMAcan be used to
enable one person totalkin soprano, whereas the other in bass (oneofthetwotalkers can carryout synchronizationforhearing
incase there is a bandpass filterfunction in the area ofthe hearer).
Anothermethodavailable is to maketwopersons tosingindifferent languages at thesame time, space, andfrequencywhen
wishingto let the audience hear the singing without beingconfused. This is the characteristics of CDMA.
On the other hand, when employingtheCDMA technology,each signal has a different pseudo-randombinarysequence used to
spreadthespectrumofcarrier. Agreat number ofCDMAsignals sharethe samefrequencyspectrum.In the perspectiveof
frequencyarea ortimearea, several CDMAsignals are overlapped. Amongthese types ofsignals, onlydesired signal energy is
selectedand receivedthroughtheuse ofpre-determined binarysequence; desiredsignals can be separatedandthen, received
withthecorrelatorused for recoveringthe spectruminto its original state. Atthis time, the spectrumsofother signals that have
differentcodes are notrecoveredinto its original state andinstead,processed as noise and appears as theself-interference of
the system.
CHAPTER1.System Introduction

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
2.FeaturesandAdvantagesof CDMA Module
2.1 Various Types of Diversities
Inthe CDMAbroadbandmodulation(1.25MHz band), three types of diversities (time, frequency,and space) areused to reduce
serious fading problems generatedfromradio channels inorderto obtain high-qualitycalls.
Timediversitycanbe obtainedthroughtheuse of codeinterleaving anderrorcorrection code whereas frequencydiversitycan
beobtained byspreadingsignal energyto more wider frequencyband. The fadingrelated tonormal frequencycan affect the
normal 200~300kHz among signal bands and accordingly,serious affect canbe avoided. Moreover,space diversity(also called
pathdiversity) can be realizedwith the following three types of methods.
First, it canbe obtained bythe duplication ofcell site receive antenna. Second, it can beobtainedthroughthe use of
multi-signal processing device that receives atransmit signal havingeach different transmission delaytime andthen, combines
them.Third, it can beobtained throughthe multiple cell site connection(SoftHandoff)that connects the mobile station and
more thantwo cell sites at the same time.
2.2 Power Control
TheCDMA system utilizes theforward(from abase station to mobile stations) andbackward(fromthe mobile stationtothe
base station) power control in order toincrease the call processing capacityandobtain high-qualitycalls. Incase theoriginating
signals of mobile stations arereceived bythe cell site intheminimum call qualitylevel (signal to interference) through theuse
oftransmit powercontrol onall the mobile stations, the system capacitycan be maximized.
If thesignal ofmobile stationis received too strong, the performance of thatmobile station is improved. However, because of
this, the interference onother mobile stations usingthe samechannel is increased and accordingly,the call qualityofother
subscribers is reducedunless the maximumaccommodation capacityis reduced.
In the CDMAsystem,forward power control, backwardopenlooppower control, andclosed looppowercontrol methodsare
used.The forwardpower control is carriedoutinthecell site to reduce thetransmit power on mobile stations less affected by
themulti-pathfadingandshadowphenomenonandthe interference of other cell sites when themobile stationis notengaged in
thecall oris relativelynearerto the correspondingcell site. This is also used toprovide additional power to mobile stations
having high call error rates, located inbadreception areas or far awayfrom the cell site.
Thebackwardopen looppower control is carried outinacorrespondingmobile station;themobile stationmeasures power
received from the cell site and then,reverselyincreases/decreases transmit power in order tocompensate channel changes
caused bythe forward link path loss andterraincharacteristics inrelationto the mobile station inthe cell site. Bydoingso,all
the mobile office transmit signals in the cells are received bythe cell site in the same strength.
Moreover, the backwardclosedlooppower control used bythe mobile stationto controlpower withthe commandsissuedout
bythecell site. The cell site receives the signal of eachcorrespondingmobile stationand compares this with the pre-set
threshold valueand then,issues out power increase/decrease commandsto the correspondingmobile station every1.25msec
(800times per second).
Bydoing so, the gain tolerance andthe different radio propagationloss on the forward/backwardlink are complemented.

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
2.3 VoiceEncoder andVariable Data Speed
Thebi-directional voice service havingvariable data speed provides voice communication whichemploysvoice encoder
algorithmhavingpower variable data rate betweenthemobile telephone cell site and mobile station. Onthe otherhand, the
transmit voice encoderperformsvoice samplingandthen,creates encodedvoice packets tobesent out tothereceive voice
encoder, whereas the receive voice encoder demodulates the received voice packets into voice samples.
One of the twovoice encodersdescribedin the above is selected for use dependingon inputtedautomatic conditionsand
message/data; both ofthemutilize four-stage frames of9600, 4800, 2400, and 1200 bits persecond. Inaddition,this type of
variable voice encoderutilizes adaptivethreshold values whenselectingrequired data rate. It is adjusted inaccordance withthe
size ofbackground noise andthe data rate is increasedto highrate onlywhen the voice ofcalleris inputted.
Therefore, background noise is suppressed andhigh-qualityvoice transmissionis possible under the environment experiencing
serious noise. In addition, incase the caller does nottalk,data transmissionrate is reducedso that thetransmission is carried
outin lowenergy.This will reduce theinterference onother CDMAsignals and as aresult, improvesystemperformance
(capacity, increased byabout two times).
2.4 ProtectingCall Confidentiality
CDMAsignals havethe function ofeffectivelyprotectingcall confidentialitybyspreadingand interleavingcall informationin
broadbandwidth.This makes the unauthorized use ofcrosstalk, search receiver, and radioveryhard substantially.Also
includedis the encryptionfunction on various authentication andcalls specified in IS-95forthe double protectionofcall
confidentiality.
2.5 Soft Handoff
Duringthe softhand,thecell site alreadyin the busystate and thecell site tobeengagedinthecall later participate inthe call
conversion.The call conversionis carried out throughthe original call connectioncell site, bothcell sites, and then, newcell
site. This methodcanminimize call disconnectionandprevent the userfromdetectingthe hand-off.
2.6 Frequency Re-UseandSectorSegmentation
Unlike the existinganalog cellularsystem, the CDMAsystemcan reuse the samefrequencyat theadjacentcell andaccordingly,
there is noneed toprepare aseparate frequencyplan.Total interference generatedonmobile stationsignals receivedfrom the
cell site is the sum ofinterference generated fromother mobile stationsinthesame cell site and interference generated fromthe
mobile station ofadjacentcell site. That is, each mobile stationsignal generates interference inrelation to the signals ofall the
othermobile signals.
Total interference fromall the adjacent cell sites is the ratioofinterference fromall the cell sites versus total interference from
othermobile stationsin the samecell site (about 65%). Inthecase of directional cell site, onecell normallyuses a120 sector
antenna inorder to divide the sector into three. Inthis case, each antennais usedonlyfor1/3 of mobile stations in thecell site

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
andaccordingly,interference is reducedby 1/3 on theaverage andthe capacitythat can be supportedbythe entiresystemis
increased bythree times.
2.7 Soft Capacity
The subscriber capacityofCDMAsystemis flexible dependingon therelation between the number of users andservice classes.
For example, the system operatorcanincrease the number of channels available foruse during the busyhour despite the dropin
call quality.This type of function requires 40% of normal call channels inthe standbymode duringthehandoff support, inan
effort toavoid call disconnectionresultingfrom the lack ofchannels.
In addition,in the CDMAsystem,services and service charges are classified further into differentclasses so that more transmit
powercanbeallocated tohigh class service users foreasiercall set-up;theycanalso begivenhigher priorityof usinghand-off
function than the general users.

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
3.Structure and Functions of CDMA Module
Themobile stationofCDMA system is made up ofaradio frequencypartandlogic/control (digital) part. Themobile station
antenna is connectedwith thetransmitter/receiver via aduplexerfilter so that it cancarryout thetransmit/receive functionat
the same time.
Thetransmit frequencyis the 60MHz band of1851.25 ~ 1908.75MHz, whereas thereceivefrequencyis the60MHz bandof
1931.25 ~ 1988.75MHz. Thetransmit/receive frequencyis separated by80MHz. The RF signal from theantennais converted
into intermediate frequency(IF) band bythe frequencysynthesizer and frequencydownconverterand then,passes the bandpass
SAW filter havingthe 1.25MHz band.IF outputsignals that havebeenfiltered fromspurious signal are convertedinto digital
signals via an analog-to-digital converters(ADC) and then,sentoutrespectivelyto 5 correlators in each CDMA de-modulator.
Of these, one is called asearcher whereas the remaining 4 are calleddata receiver(finger). DigitalizedIFsignals include agreat
number ofcall signals that have been sent out bytheadjacentcells. These signals are detectedwith pseudo-noise sequence (PN
Sequence). Signal to interference ratio (C/I)onsignals that match thedesiredPN sequence are increasedthroughthis type of
correlationdetectionprocess. Then, othersignals obtainprocessinggain bynot increasingthe ratio.The carrierwave of pilot
channel fromthe cell site most adjacentlylocatedis demodulated inorder to obtainthesequence ofencodeddata symbols.
During the operation with onecell site, the searchersearches outmulti-paths in accordance withterrain and buildingreflections.
On three data receivers, themost powerful four paths areallocatedfortheparallel tracingandreceiving. Fadingresistance can
beimproved agreat deal byobtainingthediversitycombinedoutput forde-modulation. Moreover, the searcher canbe used to
determinethe most powerfulpath fromthe cell sites even duringthesoft handoff duringthe two cell sites. Moreover, four data
receivers are allocated inorder to carryout the de-modulation ofthese paths. Data output that has been demodulatedchange the
data stringinthe combineddata rowas in the case of original signals(deinterleaving), andthen,are de-modulated bythe
forward error correction decoderwhichuses the Viterbi algorithm.
On the other hand, mobile stationuser informationsent out fromthe mobile station to thecell site pass through thedigital voice
encoder via a mike. Then,theyare encodedand forwarderrors are corrected throughthe use ofconvolution encoder.Then, the
order ofcode rowsis changedin accordancewith acertainregulation inorder to removeanyerrors inthe interleaver. Symbols
madethroughtheabove process are spread afterbeingloaded ontoPN carrierwaves. At this time, PN sequence is selected by
each address designated in each call.
Signals that havebeencode spread as above are digital modulated(QPSK) and then, powercontrolledat the automatic gain
control amplifier (AGC Amp). Then, theyareconverted into RF band bythefrequencysynthesizer synchronizingthese signals
to properoutput frequencies.
Transmit signals obtainedpass throughthe duplexer filter andthen, are sent out to the cell site via the antenna.

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
4.Specification
4.1 General Specification
4.1.1 Transmit/ReceiveFrequency Interval :80 MHz
4.1.2 NumberofChannels (ChannelBandwidth)
CDMA : 42 CH (BW: 1.23MHz)
41.3 Operating Voltage: DC 6~12V
4.1.4 Operating Temperature : -30°~ +60°
4.1.5 FrequencyStability
CDMA : 150 Hz
4.1.6 Antenna : Whip Type, 50 Ω
4.1.7 Sizeand Weight
1) Size : 121mm x47mm x 24mm(L xW x D) with case
2) Weight : 112g
4.1.8 ChannelSpacing
CDMA: 1.25MHz
4.2 Receive Specification
4.2.1 FrequencyRange
Digital : 1931.25MHz ~ 1988.75MHz
4.2.2 Local OscillatingFrequency Range : 1749.62MHz 30MHz
4.2.3 IntermediateFrequency : 210.38MHz
4.2.4 Sensitivity
less than -104dBm
4.2.5 CDMA Input SignalRange
• Dynamic range : -104~ -25dBm (more than 80dB) at the 1.23MHz band.

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
4.3 Transmit Specification
4.3.1 FrequencyRange
1851.25MHz ~ 1908.75MHz
4.3.2 Local OscillatingFrequency Range : 1749.62MHz 30MHz
4.3.3 IntermediateFrequency : 130.38 MHz
4.3.4 Max Output Power
CDMA : 0.3W
4.3.5 Interference Rejection
1) Single Tone : -101dBmwithJammer of -30dBm at 1.25MHz
2) TwoTone : -101dBmwith Jammer of -43dBm at 1.25MHz & 2.05MHz
4.3.7 CDMA TXFrequency Deviation : +150Hz or less
4.3.8 CDMA TXConducted Spurious Emissions
• less than - 54 dBc/30kHz @1.98MHz
4.3.9 CDMA MinimumTXPower Control: less than - 50dBm

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
4.4 MS (Mobile Station) TransmitterFrequency
FA NO. CH.NO. CENTER FREQUENCY FA NO. CH.NO. CENTER FREQUENCY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
25
50
75
100
125
150
175
200
225
250
275
325
350
375
425
450
475
500
525
550
575
1851.25MHz
1852.50MHz
1853.75MHz
1855.00MHz
1856.25MHz
1857.50MHz
1858.75MHz
1860.00MHz
1861.25MHz
1862.50MHz
1863.75MHz
1866.25MHz
1867.50MHz
1868.75MHz
1871.25MHz
1872.50MHz
1873.75MHz
1875.00MHz
1876.25MHz
1877.50MHz
1878.75MHz
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
600
625
650
675
725
750
775
825
850
875
925
950
975
1000
1025
1050
1075
1100
1125
1150
1175
1880.00 MHz
1881.25 MHz
1882.50 MHz
1883.75 MHz
1886.25 MHz
1887.50 MHz
1888.75 MHz
1891.25 MHz
1892.50 MHz
1893.75 MHz
1896.25 MHz
1897.50 MHz
1898.75 MHz
1900.00 MHz
1901.25 MHz
1902.50 MHz
1903.75 MHz
1905.00 MHz
1906.25 MHz
1907.50 MHz
1908.75 MHz

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
4.5 MS (Mobile Station) Receiver Frequency
FA NO. CH.NO. CENTER FREQUENCY FA NO. CH.NO. CENTER FREQUENCY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
25
50
75
100
125
150
175
200
225
250
275
325
350
375
425
450
475
500
525
550
575
1931.25MHz
1932.50MHz
1933.75MHz
1935.00MHz
1936.25MHz
1937.50MHz
1938.75MHz
1940.00MHz
1941.25 MHz
1942.50MHz
1943.75MHz
1946.25MHz
1947.50MHz
1948.75MHz
1951.25MHz
1952.50MHz
1953.75MHz
1955.00MHz
1956.25MHz
1957.50MHz
1958.75MHz
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
600
625
650
675
725
750
775
825
850
875
925
950
975
1000
1025
1050
1075
1100
1125
1150
1175
1960.00 MHz
1961.25 MHz
1962.50 MHz
1963.75 MHz
1966.25 MHz
1967.50 MHz
1968.75 MHz
1971.25 MHz
1972.50 MHz
1973.75 MHz
1976.25 MHz
1977.50 MHz
1978.75 MHz
1980.00 MHz
1981.25 MHz
1982.50 MHz
1983.75 MHz
1985.00 MHz
1986.25 MHz
1987.50 MHz
1988.75 MHz

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
1.INSTALLATIONMETHOD
IDLEBUSYSMS PWR
iPORT
AnyDATA
6~12V
Input UART1
EAR/MIC UART2 ANT
Connector
COM1
8 Pinto 9 Pin
Cable
Power
Supply
(6~12V)
+-
HeadSet
ANT
1) Supplythe voltage of 6~12V to 2pin Connector of the EMII-1900.
2) Connect the UART1 to PC COM1 port with the RS-232C cable.
3) Installthe operatingprogram.
CHAPTER2. NAM Input Method

Interface DescriptionEMII-1900Service Manual Application Information
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2. OPERATION METHOD
2) Set Buad rate to the modem s.
3) Click [DM mode]
1) Run PSTDM program at Windows95 or Windows98

Interface DescriptionEMII-1900Service Manual Application Information
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4) If OK is displayed in the message box,modem is now ready for
communication withPC.
5) Click MENUBAR icon.

Interface DescriptionEMII-1900Service Manual Application Information
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6) As shown inthepicture above, service file input plane will be displayed
(See ifclockis running. If it isn t, communication with PC is notactivated.
Repeat step 1 through 5, orresetthe power of modemand repeat step 1 through 5)
7) Type NAM Programmingscript like the example shownbelow,
<NAM Programmingscriptexample>
Mode offline-d [ENTER]
nv_write name_nam{0," AnyDATA telecom "}[ENTER]
nv_write name_nam{1," AnyDATA telecom "}[ENTER]
Mode reset [ENTER]
SCRIPTINPUT WINDOW

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
1. Overview
RFT3100 receives modulated digital signals from theMSM of thedigital circuit and then,changes theminto analog signals by
thedigital/analogconverter(DAC, D/A Converter)inorder tocreate basebandsignals. Created baseband signals are changed
into IF signals by RFT3100 and then, fedintotheMixerafter going throughAGC. IF signals that have been fed are mixed with
thesignals ofVCO andchangedinto theRFsignals andthen,theyare amplified at the Power AMP. Finally,theyaresentout
to the cell site via the antenna after going throughthe isolatorand duplexer.
2. RFTransmit / Receive Part
2.1 CDMATransmit End
8bitIand Qtransmit signals are inputted into 2DACs (DIGITAL-TO-ANALOG CONVERTER) from
the outputterminal I_DATA,I_DATA\, Q_DATA, Q_DATA\ of MSM throughthe input terminals
I_DATA, I_DATA\, Q_DATA,Q_DATA\ of RFT3100. Transmitsignal input speed is twotimes of
TXCLK+, TXCLK- which are two transmit/receive reference frequency.
Amongtransmitsignalsbeinginputted, signalsare inputted intoIsignal DAC when the transmit clock is
in the rise edge, whereas signalsare inputted into QSignal DACduringthe drop edge. Iand Qtransmit
signalsare compensated and outputted at MSM in order to compensate the 1/2 clock time difference
generated between reference clocks. Inthe signals comingout from the output terminal of DAC, there are
spurious frequencyingredients resultingfrom DACoutput transition edgeand parasite ingredients,
transmit clock frequencies and harmonics which are unwanted signals. Accordingly,spurious ingredients
are removed bypassingthe signalsthroughLPF of passband 6.30KHz. Unlike the receive end, the
transmit end LPF requires no OFFSET adjustment. Analogbaseband signalsthathave passed the CDMA
LPF are mixed withIand Qsignals of frequency130.38 MHz (260.76 MHzcreated in the RFT3100
internalVCO are divided byhalf into frequency130.38MHzhavingthe phase difference of 90 degrees) in
two mixers. The mixed signals are added againand converted into IFfrequency130.38 MHz 630 KHz
(CDMA Spread Power DensityModulated Signals) and then, outputted.
2.2. Tx IF/Baseband Processors, RFT3100 (U102)
The RFT3100 includes digital-to-analogconverters(DAC) for convertingdigital baseband to analog
baseband, low-pass filters, amixer for up-convertingto IFand an 85 dB dynamic rangeTxAGC
amplifier. The RFT3100 has an IFmixer for upconvertinganalogbaseband toIF, aprogrammable PLL
for generatingTxIFfrequency,single sideband upconversion from IFto RF, two cellular and two PCS
driver amplifiers. The RFT3100 will operate over the follow Txfrequencyranges :
Cellular band 824MHz ~925MHz
PCS band 1750MHz~1910MHz
CHAPTER3.Circuit Description

Interface DescriptionEMII-1900Service Manual Application Information
EMII-1900 V1.0AnyDATA.NET Proprietary Use Subject to Restrictions
2.3. Transmit End Bandpass Filter (F102, F103)
Transmit signals that have been converted from IF signals into RF signals after passingthroughthe
RFT3100(U102) are inputted intothe Power Amp (U103) after passingonce again throughRFBPF
(F101) in order to filter out noise signals amplified duringthe amplification of RF signalsafter going
through RFT3100(U102). This is carried out in order to create power level inputted to the Power AMP via
RF BPF (F101). ILof a RF BPFis 2dB as amaximum, whereas the ripple in the passingband is
2dB(maximum). The degree of the suppression of transmit signalson receive band isatleast20dB or
greater. The maximum power that can be inputted is about 25dBm.
2.4. Power Amplifier (U102)
The power amplifier U102 thatcan be used in the CDMAand FMmode has linear amplification
capability,whereas in the FM mode, it has ahighefficiency.For higher efficiency,it ismade up of one
MMIC(Monolithic Microwave Integrated Circuit)for which RF input terminaland internal interface
circuitare integrated ontoone ICafter goingthroughthe AlGaAs/GaAsHBT (heterojunction bipolar
transistor) process. The module of power amplifier is made up of an output end interface circuit including
thisMMIC. The maximum power thatcan be inputted throughthe inputterminalis +17dBmand
conversion gainis about 28dB. RF transmitsignalsthathave been amplified throughthe power amplifier
are sent to the duplexer and then, sent out to the cellsitethroughthe antenna in order to preventany
damages on circuits, thatmaybe generated byoutput signals reflected fromthe duplexer and re-inputted
to the power amplifier outputend.
2.5. Description of Frequency Synthesizer Circuit
2.5.1 Voltage Control Temperature Compensation Crystal Oscillator(TXC201, VCTCXO)
The temperature range that can be compensated by TCX201 which is the reference frequencygenerator of
mobile terminal is -30 ~+80 degrees. TCX201 receives frequencytuningsignalscalled TRK_LO_ADJ
from MSM as 0.5V~2.5V DCviaRand Cfilters inorder togenerate the reference frequencyof
19.68MHz and inputitinto the frequencysynthesizer of UHFband. Frequencystabilitydependingon
temperature is 2.0 ppm.