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Contents

Muitimeter Tt,,,,t Hewlewpackard ManualPartNo MicrofichePartNo PrintedAPRIL Tableofcontents C0NTENTSGontd RABLEOFCONTENTSCont,d Listofillustbations PorariryR,tüä Diagram Äl,il ?7l+eatic ?rorrACAdiGüffi Frz 0PT0NS 12ACCESSORIES.AVAITABLE1lNTBoDucTl0N SPECTFtCATI0NS 14INSTBUMENT.AND Manualidentifica T I O N 35+o . os +o . o2s Lo . t 8 1 5 0 Contd SpecificationsOo7 .005 .0m O07 .oo5 1000.0v SpecificationsCont,d00fiv 24hours23o 10c Vin = vs/H rl DVs/uSectionI Model34904 GenerallnformationContd Dvs/H REc NTR0DtCTloN BenchUse InstallationINSTALLATION.OFOPTIONS LsolatedData0utput0ption021-hp-111ZlAl Data0utput0ption021 Option050andOption06029INTERFACE.CONNECTIONS RemoteGontrol0ption022 SectionII Model34904 7N i 3i -s t** JrJü,1t Fc öOPTtoN021 2H* F EI = 6 s i ä 2 qd E ? 3 5 fr i F 3 ä REMOTEINPUTCONNECTORJ75 E E i F = = = ! 9 i l Cablepart NO. Length RearInputGeneralPurposelnterfaceBusConnections 10631A 6 3 1 10631C 9 9 f GeneralPurposeInterfaceBusConnectorsGPIBBUSCONNECTORJl2 Outguard TriggerConnections,GPIB0ption030 Sample/HoldConnections,0ption040/045 Repackagingforshipment S7-30360-37sD e l 3 4 9 0 a For J7 is -hp- Part No -0084 Amphenol SectionIII Model3490A 13FRONT.ANDREARPANELOESCRIPTION WARililGInstbumentcapabilities 15MAXIMUM.INPUTVOLTAGES Guarding I7 . GeneraloperatinginstructionsTurn-OnandWarm-Up FloatingMeasurements SELF.TESTOPERATION Acvoltagemeasurements Resistancemeasurements InputConnections 60.0hmsSignalVoltageandCurrentOutputSignalsandLevels 62.0hmmeterSampteRateandBesponseTime 79.0utputSignals InputSignalRequirementsInputSignalsandLevels Data0utputlsolation SRo GPIBBusSignals030 DAC RÄi+ -cg- lL 101Talk.0nlyNoController103GPIB.Controlof3490A L l AddressCodes To7Asciicodecharacter Binarycode Octal Code 2 3 4 5 6 ProgramCodesA R a C T E R USE Ldav F D Will acceptdata Printerand 3490A349OAand Printerwill Ooü 0 f R \ r @üoü@f E \ I X E D N I 1 JGPIB0peratingExamPle SetsLREN LOWon bus To haltprogram,press 136Controlby.MarkedCardProgrammer\tD?u6,.. TlE,, . ?5V SroP l CMD?U6 OUTPUT13,30 ..M3R7F@E 27 l 349OA PRoonnvr LrrruE,irOr o o l 4 0 z o F r 152Special.S/H0peratingGonsiderations 158Input.SignalLimitations160Sample/Hold.TriggerSignalRequirements 156Guard.ConnectioninSample/HoldMeaurements OtherOptions 165Initiating.Sample/HoldMeasurementO40 O20 040 030 200 173Using.theTrack/HoldModeTypicaltimereouiredto SETTLETO1 % 1000v Voltageactually TnputvoltageatM EO F S / HT R I G G E R Measured T a Vc-vs 179Using.theAcquire/HoldModeV e T s $184.RATIOlfleasurements0ption080 182Using.50Hz or 60Hz PowerSourceOptions 050or060RatioMeasrementProcedure $186.ExternalBeferenceVoltages Model3490A 4I . Intboduction ßüy+3 . Generaltheoryofoperation +19 .DCANAL0GCIRCUITS DisplayRangeandFunctionControl LnputAttenuator +23. DCAmPlifier SwitchingCircuitsBoottrapCircuit +25. OCAmplifierGain SectionIV Model3490A OtuiLs, ys Rt-- c-++ Dual-SlopeIntegration IntegratorcircuitsIntegratingAmplifier 52AC.CONVEBTEB L44. x 20AmplifierZercDetectAmplifier ACAttenuators Ohmsconverter HmmeterPowerSupplyCurrentSource InputProtection +70 ISPLAYASSEMBLYFigureHmmeterReference DisplayUnits TimingCounter DataGounterBuffers M I N G 10. Block Diagram,Main LogicASM Flow Chart R0,0m 11. Block Diagram,Main LogicCircuits Model3490A Tl-90.AlgorithmicStateMachine 105Input.PolarityStorage Enaele P U T S Enable Oualifierinput To ROMTransferandZeroDetect +il5. DCSWTTCHNGLoGrC +II7 . Referencesupplies RatioMeasrements0ption080 + I 7 +128 .FBONTPANELS1VITCHING Powersupplies+ t Polarityin Ratio Measurements +I32 . Self . Testfunction134Logic.Test,No.l G H +143.0.1VRangeZero,TestNo.b TurnoverError,TestNo.3+137.10V RangeZero,TestNo.2 4145.x .01Atten.x, 100Gain,TestNo.6 +158 .DATAOUTPUTOPTION021 4t74.REM0TEC0NTR0t0PTtoN022 +r9 DauFlag +188.ShiftRegistersLocaURemoteFlip-Flop 198GPIB.System +2r GPIBSystemOperation +212.SAMPLE/H0tD0PTl0Nll40or045 Figwe 4-23. WaveformslllustratingAcquire/Hold Mode216Acquire/Hold.Mode +23 TooSample/HoldAnalogCircuits @ n z Compensation Ja+zRoo TooK +25 Flgure4-27. Sample/HoldLogic Block Diagram228Sample/Hold.LogicCircuits Lye e outpur External DC Amp512 615.0 1000v 124.4 154.O Exterml Hold H HehsPage Figurb4-30. Sample/HoldMeasurementSequence Ortoroo OruY --Jl Example of TRACK/HOLD MEA Surementseouence Waveformsarenot drawnto timeo, o,,rnI?ltIntegrator I-r Gort +prr2zrs.i Qrs Sre Ero-+ 3r4 Zra Orr RIOLD A1 bHOLD B r l l RecommendedTestEquipment 10kn Performancechecks S7. Performancetests TNTB0DUCTIoNRecommendedtesteouipment $9. Dcvoltmeteraccuracytest 15OHMMETER.ACCURACYTESTS Performancechecks@ \ d L6. PreferredMethod OhmmeterAccuracy AC Voltmeter AccuracY1OO Dcvoltmeterinputresistancetest PebformancechecksACCOMMON.MODEREJECTIONTEST S24.ACNORMAL.MODEREJECTION O o ? Rrr-rrr--rModel3490APERFOBMANGECHECKS 28AC.VOLTMETEHINPUTIMPEDANCETEST MU L T I M E T E R h p 3 4 9 O a @ \ - O @ @ o oTest Oscillator 6 5 2 a $38. DC/DCRatioAccuracyTests PerfohmancechecksRATI0PEBF0BMANCE0ption 080 + 100.000 45GPIB.0PEBATIONALCHECK0ption030 S41.AC/DCRatioAccuracyTestExternalReferenceInputResistanceTest Ext Ref Nput Lnput Display Limits Range Voltage Lo v Ranse PERFORMANCECHECKSModel3490A It l l K o1000kO range +tll IiI Fä il Ir fliFj Fl Ii tti 1üj Li i l I i , Il R * ! i t F TRf,lIr i5i 1.+ri It I l L1,1ti $ 51 .ADJUSTMENTPROCEOURES ProceduresAdjustment Powebsupplyadjustment $57. Referenceadjustments Model3490AAOJUSTMENTPROCEDURESSectionVDczeroadjustments Dc standardhp- 7a0Bis requiredfor these 69SAMPLE/HO.LDADJUSTMENTS $66. Ohmmeteradjustments $75. DielectricAbsorptionAdjustment Model3490AADJUSTMENTPROCEDURESSectionV73.0ffsetAdjustment Dc standardhp- 7a0Bis requiredfor this Lqe AojustmentproceduresRatioreferenceadjustments Orrra Adjustmentprocedures ColTect Perfobmance Testrecord LO.V l O V 1 0 Performancetestbecordcontd001v r 0.oo1v + 1 2 . O O O Ext Ret Fngu V 1 0 Performancetestrecorocontd50000v Ooooov 120000v 00000v 10.üoo 12.0000v NON.LISTEDPARTS IntboductionOrderinginformation Proprietaryparts Description Mfr Mfr PartNumber Designation Code OtvReference HPPartNumber B l e 6 1 . R e p l o c e q b l eP o r t s Rcor-@4o Leol-m4ol\ B l e 6 1 . R e p l o c e o b l ep o r t s l C o n t d lModel HP Part Numbel OtyReference B l e 6 1 . R e p l o c e o b l eP o r l s C o n t d B l e 6 1 . R e p l o c e o b l eP o r t s C o n r d AI R3A AIR3@ QtyB l e 6 1 . R e p l o c e o b l eP o r t s C o n t d f 28480 2a4AO Aterei alnz? R t s l C o n t d f E p l o c e o b l eB l e6 Model 3490Ä B l e 6 1 .R e p l o c e o b l eP o r t s C o n t d OtyDescription Mfr Code Mfr PartNumberDesignationReference HPPartNumber Reeo-sg B l e 6 1 . R e p l o c e o b l eP q r t s l C o n t d lOaa+-rrtt $ DMT4LOON A5s4 Sli2 B l e 6 1 . R e p l o c e o b l eP o r t s C o n t dR5ß7 Aoaroassyrehotejuxper CB a72l OtyCr r?21 ?5r-orlo 28aao OtvDescription Mfr Mfr PartNumber DesignationHPPartNumber Code 2A480 Zroo rzaaAA B l e 6 1 . R e p l o c e o b l ep o r r s C o n r dRe*-ooar lil Orzo-oo+o Designation Description Mfr Mfr PartNumber CodeReference HP Part Numbet otv B l e 6 1 . R e p l o c e o b l eP o r t s C o n t d C5 22at B l e 6 1 . R e p l o c e o b l eP o r r s C o n t dC8 ?2rl DrT4LOara AI3CR8 ModeI34904T u 2 I l 5 u O O E B R E a K D O I I N Caeleriaeon Ottgiitrdrei Isolatii Boardassy R 2 rModel Section Cableribbon A22API Heiioi 400 B l e 6 l . R e p l o c e o b l eP o r t s l C o n t d600 A27RI Rfxd Cotp IOK OHX IOI L1Y B l e 6 1 . R e p l o c e o b l eP o r t s l C o n t dA2ARI OBD Z9cl 2 e c t 429C4 29C5 OHn 1trÄ 1/4W A3IU3 I I P 22K otr lotI P l2K OHI lot A32RI Reference HPPartNumbet oty Description Designation Mfr Code A39RA 2211 2211 CBA34YI 2A4AO 2S4AO B l e 6 1 . R e p l o c e o b l eP or t s C o n t d Reference HP Part NumbelT20/o IcxssIs assY B l e 6 1 . R e p l o c e q b l eP o r t s C o n t dEIlrDtrs PosT assY 284r0 2a+ao 2A480 28480 2g4AO 284aO Reference HPPartNumberDescription Mfr Mfr PartNumber Xo1 Mfr Code Mfr Part Number Reference HP Part Number DesignationOtvDescription B l e 6 l . R e p l o c e o b l eP o r t s l C o n t d l MP7 SectionVIMP37 MP23 Designator L M P l a MP1B M P l C MP1D MP2 MP3 MP4 MP5 MP6 318x32 29500043 Troubleshootingtrees PbeliminarytroubleshootingACCESSF0RSERVtCtNG Powersupplychecks AZAsemblyExchange TableT-2. PowerSupplyJumperWires13DC.ANAL0cCtRCUtTS DCAmplifierChecks A N D 0 V L E V E L S O C C U R a T DCAmplifierSwitchingGircuitsNlii I G G E R S C O P E a T a 1 T P K , + S L O P E 37OHMS. Convertebtroubleshooting 3I .INTEGRATOR Troubleshooting33AC. Convebtertroubleshooting 21A. -to-C0NVERSt0ND CtBCUtTCHECKS Displaytroubteshooting Logictboubleshootingsuggestions 59SAMPLE/HOLD.SERVICING 65SAMPTE/HOLD.TROUBLESHOOTINGTREESExternalTriggerCircuitGheck Accesto Sample/HoldGircuits 03490€6528 2200013903490-006M O3490-27301 RATIO.TBOUBLESHOOTING 75SCHEMATIC.NOTESAmplifierZerc0ffset Truth Table Logicgatesymbols+ 5 Truth Table Alu401 Rexe SectionVII Model3490A AlphabeticalListingof 34g0A MnemonicsU 4 o t Nrsc IaFeV-pF Tl-l= l Guspb b lPage I1Lgji Iai ott *nn !drp6 ltnt. rync,+.1@ I1glilRtl7-r2 + Input 3ttr . n @ @@Ll?Qxl c207c2or ? 1 t 6 1 l 7 + T i + ? Q208 UiLT E YES AITPK. + Q2O5 t1 swith3 6 m s i 4 Ratio INT 0205 R317-1O2or 0208 LfT +.JLRaG Q9e See Notes 299A Ffi 14,iä?rSlI LOomsF 1s17-t6Ov1--t==- -l6oms R7vl l Tlrtlt Wath AnDr Rd 15 ot Altrt. JFuldbo+5V Lm r . tt Llo Tlrtlt Wath AnDr R7l7-r8 Troubl .. hoor A7Ot ?CRIOüa ll Iub s!!h #lsriieo,e*lEff#ri I l DisplayTroubleshootingTree T9lt =LJ. L--l L i l t lT l ITa --- it O 1 o Ru*rffifcTEv NVWPage 3t,1 Lirlt?lt..it \- toresh@rArur5 aIut1 JO24 oo24 @24 oo24 9032 oo24 t.o24 n 4 n2.4 Lop + 10.oo24 Initiare 6 mre smplesDisplaysholdread + 60O0.xxOL LDr s Tl=lS l . l €@CI6@@e#ffi + 5 n-s l r S + + i O 5 4 s F Otuu U.T,J,l,,t-tTtj ,o +5 ms-l 10. Logic Clock TroubleshootingTree 2317-1 $E B?tr+1HHHLE r r r r r r r l THttttffiL sl \f -Jt +1 l +ft$b!too Llt L- l l---,.lUs-l Url 5 a Jtr2cr +- zoomsl \ÄÄLlj. -zooms*#ll-+l.l-r Pulses Ti1i Ea . f1-t.i1 2s17-26 = b3mtl At7A2 I. J?Ffi Gig Tlu2, a t1u3,Arl NOI€S + 5vr-r =rFTh.-l 1o.4ßF +s-Yml Figare7-12.RemoteTroubleshootingTree,Option022 2717-28RtN*16t12 +o.cF Start 9 0 D- 3 3 8 Hffi3 338r 13. GPIBI/O TroubleshootingTree,Option030 2917-30 Cauil oN . l Port No V . C Hp Porl No O Rev . BÖl--.le Correcn A27KI Shoulo 8€ CLOSED.SET SAMD a Main CIRC-IIT8OAFO. Shouloae SET S/H Sayitch to TFACK/HOLDCABLESCORRECTLYGO. to 9 0 D 3 4 3 T3t17-32Oft-.*l HOLD. M€ASURE Voltage AT Port No . O349O Rev . C I,lHp Fort No -66527 Rev.B To A2 X E Iore Sigial G€S High 8Ap-crtot awrcH To rRcxEogeof .AIPLIHOU TRIGGCR!G Tote RävnG.iir Ffi.f-LJüJ 3 f r a 73317-34 3490-0 Hp Pott No.O349O LOW P U TEXT REF TPC High P U T TPCLOW TPC A13CR6 + l 0 TPCG H LOW G H LOW H I G H L O W 16. Ratio TroubleshootingTree A31 Rearof Instrument A33A12 A17 A22 A11 3 or A36 A34 A35 A30 Ral € dI11 111 #Jälslt*tJl=l +++F+r@aJj,i @ @.6r Rö*et e J l + ö Üä,ierispgglg*@ WEE @D@@@@@ ++++++++f++Evvvvvvvvvvvv EfEU 18 a Block Diagram 737 REFEBETTCEDESIöTATIOtIS FP?fäWüE,Ä,li CoKno Ilgt,,a ,,r.i.li LelQgLli-@@@@@@@ Q l Hovpoverloaoprotectionh OverloadprotectionA R D RuorerzV AA Bootstrap P L I F I E RT6azt A M P L I F I E R Feedbackattenuator \+l? z e 1 2 z 391740 $E?Z r z l Zl-----l ?o70 f 9i czo1@$Y@ Y 6ö Ff$$**H++ IRrr5- l .FrrBll- l Pt lP r f SueeLv +rzV ----d-tr-E +tzv +5V +5v TZV TZV ---b Lp/0 Al I MArNcrRcurrassEMBLYo34so 6650r +ov +rovFRoM Sv---*-l---5v C203 o.33 Zero Detect 1411742T7v- t7v CR202 XPf*trt*r+9e . E Faq h-,,dnTf,rl Rblhb-l- --,1 Itu FfieOtt,t ?-rv V E R T I N G P L I F I E R F E R E N Cpeo L a R I T YL O G I C+REFERENCESUPPLY Figr F E R E N Cpeo L a R I T YL O C I C 7431744U3o! ----t V E R T I N G Llt ri.ä-i.i Ffi ß?i-,- *$1,sE1iVRrr Nililji ?ääijO * 9sö $ O*. n i!g!?ifiJjscaNBH Powerfrom -5v---dä-!-- IP*3333 1 6 t Siorra \------lJ7451 Timingcounter Stir lT- Il P .L.iU.B Ll 11I3g.i Äiiiirr lir,il..1 Ilir ! o @ @, = T-T Nne--r LHur I3Bl,J-rRua --I xma R N O N C L E a R R C U I T 3bEi,?# Röüärrrr-l L o FRoMU6iIä?5Silij Otonrä A N S F E RA N D Z E R O D E T E C T Tansferenableh F R O MU 9 2L8d,tshäl 3Yä1..dP P U T L a RIT Y Storage E i i + + i + Pp* @@@@@@@@@@@@Il J @@@@@@@*späsw Lffioi IlJ**io**l.Io,l6ffi-l Fää-.trto-*tot 74917-50 Soue.e,.oloieftil-lSoupr-Ezro-r-oirfr Fs-rLErHoLDpi6il-l Hp PortNo O + q r\ 9 t r l = l \ R l Ig t31,.9uIGgARo Rr,rorHER220V Toov T20v 240V TOAa OuiroRegulator Grppry Optrorr Assr Ozot +3OV Regulator 5117-s2+ l 7 v Regulator 3OV Regulator REV . B Hp Port No.O349O-66503BCD =i33SfTHr-+ EnableRoaru4oreil Polaritydisplay A N N E R a T O R Polaritydisplay EnableU4,uro Scan Decoder S3l7-s4 Figwe 7-27. SchematicDiagram,Display, A3Io*F Ra FE FA FB Componentside = ER C U I TS I D E Ror..RArEcH,rrr., tfl*l S l r q r lQ N a e r , *I .l ,*l ,i , ,ElllRANGEIH**iL R*.,j# LFUNcroNl Ss -s6LFaN6E-l s4 Test Ll l =sÄl---l+ + 6 D L-sJ V, cK+ A6T* .* r*.* *-..u+tzv ---fre- +rzv r l +5v --+r5- +5v Converteramplifier OotAttenuator + r 7 Filter Figwe 7-29. SchematicDiagram,AC Converter,A6S7l7-s Nc corvepreR ourPUT1 Ofqlrod 06t90-O999-l Drluod O6t9O-20999UeacpalpueHuoll3as Flt Bl,,J.li,i Vrx Norlrr,rn CNn.Norr vH Ei-trIfl3?5fö*co,c GttornrvsnHounor Rsnxo U3t3NltHO33N3U3J3U Arn8rg Crlerueqcs Surq6 Urur8erq RelJouoJrV 0vLl6sLN3UUnC l3unos Ssoucv 39N lmdNt 42242 ? ? TA22Al Rxrnrr 1M1 ASSEMBLY 3äYäiäT?lTl-?.1..iFff.ItTrsGooo +l--.r +l8oyJl,flylo SAMPLE/ Hold Triggercircuit Tl,,t1 +f-!-l-tr-ourcuaRo 7411142Wro Ro ooroorrr coNNEcroRJ6 Ro *.or. ,*r* coNNEcroRJ7 Ur-l L J J lÄlll 5 a Q U E N T I ALO G I C ÄX?,3,.oLEoR Eon Fil!Täläf Freque +-n Logtc Clock FrequencydoublerdelayData Multiplexers Outguard DAraFLAG # , . , J9 \ I C E N I a N ri fr. F 2eI W S H I F TR E G I S T E R S I G a N E+5vr---1i1+4 Guaro Zfu*-rrot + 4 lOi---qo 74317-64 7 a At7Oo-1 Al2 Hp porttJo,03490-66512 LOCAL/ Remote FLIP- Flop + sLO REMoTEnruruurrcraron LOCAL/REMOTE = r RHs tl su31sr93u 91 .-Ct LockdelayAJtlilo-*il1.iI FlIto*.- -7u u5 NBId \ .,- I \ Onr9nvu0 rdtIlnn-u3x3Rns+ Ouvngmo l,ssv Z r Hp Port No To A2 C D E F H J K L L8 PRbou%u F8fi814,0o*%ÄäuJJii T8 iäB?i 46.4 K R c * o lI l r g SIf U8 is BAD.OUTPUTWAVEFORMS Will 8E Loadeddown Rt\u ?? l9Li9i.-.?747l7-68 ? * t o RrreenrroR Porf No . O349O Rev . C U l H€l-----19 TABu?,.ffiIi OriIäo*,j.,lj!,j O 1 A L I F I E R M U L T I P L E X E R Bs-uM P L E /H O L D T R I G G E R CI RC U I T S Hmtb ?6Tr%r,i ?.46,f74917-70 OEo o r a o r B orc o r o o t M JilCRs SDo To S/H Logic I N E LOCAL/REMOTE $ Ection Aage Clocks 5 Lines DislayCOPYRIGHTt973 by Hewlett Packaro Ouoorn REcErw 36.BlockDiagram,3490AGPIBVOCircuits 7117-72 FC Company Hp Porr N 0 3 4 9 0 6 6 5 3 6 Rev a L24-----r3-l Or5Hp Port N o . O 3 4 9 O 6 6 5 3 4 R e v .A N D RnvH ornv H Or6rnrv CucxJ Rvu . Hccr TotOrurr9iorrrol98rfiilV RvrrxrJNorroNnr Rfillj Tt lrstl3ssv Ertv Rzr SlinurSosr 83x3ldlrln$l S K RaI ,tuf,r 3+r7vUui-,f +sv Tzv--Le f -rzv ?,il9Bälooo O r+Fol U 1 R l?oti.lä?fr?ox?Ei6q*1Eefi&x?ot Port No Rl?ulF5-ß-olqrroil Ä33aUu +sv ETGpr 03490 Lre a Ä3aGLA HRsr o RfbÄiÄÄ 2 -ixaorJ 7517-76? l Or.nroro Orrl assv 2 l L3-JrIt TLr.sl-------l 432Ri------l Hp porr No.03490-66532Rev a 22LEoP-rJi,19#E8ffi0 22fr,.#.!äi$o LsRe--1i-,r Lrrx i--=20A%ll?i8*o1lg9lRor-oos---Lrs-r-oosl 20 loo.tfliloX!3VotoLRMrl I I z Iä.ggx3!.zzOoorf Fruox Roro-r-,@CvvH r Ilo Sa-oosl.J?il!.31..Ä.OZ Ilr9I3?ü?591.ZZ Nzr Rnzr RE+ R K o TT----lHp Port No.oi49o-6653t RevA CR3 CR5 Wououvngrno Oo-1--5Rvvr +lvvH Vrvossv Ovvx-+ O L a T E D P O $ / E RS U P P L I E S +rzv1+ 5 V r + l z v l LsoroH YourZtisv Orur IsoroH L n OZssv Rorol L0Nvl3 33Nln0ls SruvdroN OrlsrN0rrcn00urNll JzztyostorJzypxJ TluzvtJzv Inzvlrncrrc Ppv Pue gluzv ot ZzlosroJeu TlzGszzov O ö t Äää Ii ä ä iEää3 Arnorg LLVrueroerg Clpuaqcs Reslquassv.plgglLoV!Z!oNpueol A8dqdw Burur5ÄffiäHi!,äffT1Hiä1s,äTffff-nill-,gl Toot lsn tosütünlYrnilYw LodrlaH Owl v N n l v r r n u r u sPulsl ÄJnuf LqunloC IEIuqcaI OpuntasIutdd!q\Nf L a a J o J d Sttvs ? 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