Dolby CP750 Digital Cinema Processor Manual

Issue 5 Part Number 9110270

Dolby Laboratories, Inc.

Corporate HeadquartersDolbyLaboratories,Inc.100PotreroAvenueSanFrancisco,CA 941034813 USATelephone4155580200

Fax4158631373www.dolby.com

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LIMITATIONOFLIABILITY:ITISUNDERSTOODANDAGREEDTHATDOLBYLABORATORIESLIABILITY,WHETHERINCONTRACT,INTORT,UNDERANYWARRANTY,INNEGLIGENCE,OROTHERWISE,SHALLNOTEXCEEDTHECOSTOFREPAIRORREPLACEMENTOFTHEDEFECTIVECOMPONENTSORACCUSEDINFRINGINGDEVICES,ANDUNDERNOCIRCUMSTANCESSHALLDOLBYLABORATORIESBELIABLEFORINCIDENTAL,SPECIAL,DIRECT,INDIRECT,ORCONSEQUENTIALDAMAGES(INCLUDING,BUTNOTLIMITEDTO,DAMAGETOSOFTWAREORRECORDEDAUDIOORVISUALMATERIAL),COSTOFDEFENSE,ORLOSSOFUSE,REVENUE,ORPROFIT,EVENIFDOLBYLABORATORIESORITSAGENTSHAVEBEENADVISED,ORALLYORINWRITING,OFTHEPOSSIBILITYOFSUCHDAMAGES.

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Dolby,ProLogic,andthedoubleDsymbolareregisteredtrademarksofDolbyLaboratories.SurroundEXisatrademarkofDolbyLaboratories.Allothertrademarksremainthepropertyoftheirrespectiveowners.2011DolbyLaboratories.Allrightsreserved.

PartNumber9110270Issue5

S11/21444/24795ii Dolby CP750 Digital Cinema Processor Manual

Regulatory Notices

FCC

NOTE:ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassAdigitaldevice,pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonableprotectionagainstharmfulinterferencewhentheequipmentisoperatedinacommercialenvironment.Thisequipmentgenerates,uses,andcanradiateradiofrequencyenergyand,ifnotinstalledandusedinaccordancewiththisinstructionmanual,maycauseharmfulinterferencetoradiocommunications.Operationofthisequipmentinaresidentialareaislikelytocauseharmfulinterferenceinwhichcasetheuserwillberequiredtocorrecttheinterferenceathisownexpense.

Canada

ThisClassAdigitalapparatuscomplieswithCanadianICES003.

EU/EMC

ThisunitcomplieswiththeEMCrequirementofEN551031andEN551032whenoperatedinanE2environmentinaccordancewiththismanual.

Important Safety Instructions

1. Readtheseinstructions.2. Keeptheseinstructions.3. Heedallwarnings.4. Followallinstructions.5. Donotusethisapparatusnearwater.6. WARNING:Toreducetheriskoffireorelectricshock,donotexposethisapparatusto

rainormoisture.7. Cleanonlywithdrycloth.8. Donotinstallnearanyheatsourcessuchasradiators,heatregisters,stoves,orother

apparatus(includingamplifiers)thatproduceheat.9. Nonakedflamesources,suchaslightedcandles,shouldbeplacedontheapparatus10. Protectthepowercordfrombeingwalkedonorpinchedparticularlyatplugs,

conveniencereceptacles,andthepointwheretheyexitfromtheapparatus.11. Onlyuseattachments/accessoriesspecifiedbythemanufacturer.12. Unplugthisapparatuswhenunusedforlongperiodsoftime.13. Referallservicingtoqualifiedservicepersonnel.Servicingisrequiredwhenthe

apparatushasbeendamagedinanyway,suchaspowersupplycordorplugisdamaged,liquidhasbeenspilledorobjectshavefallenintotheapparatus,theapparatushasbeenexposedtorainormoisture,doesnotoperatenormally,orhasbeendropped.

14. Donotexposetheapparatustodrippingorsplashingandnoobjectsfilledwithliquids,suchasvases,shallbeplacedontheapparatus.Dolby CP750 Digital Cinema Processor Manual iii

Regulatory Notices15. CAUTION:Troubleshootingmustbeperformedbyatrainedtechnician.Toreducetheriskofelectricshock,donotattempttoservicethisequipmentunlessyouarequalifiedtodoso.

16. Donotdefeatthesafetypurposeofthepolarizedorgroundingtypeplug.Apolarizedplughastwobladeswithonewiderthantheother.Agroundingtypeplughastwobladesandathirdgroundingprong.Thewidebladeorthethirdprongisprovidedforyoursafety.Iftheprovidedplugdoesnotfitintoyouroutlet,consultanelectricianforreplacementoftheobsoleteoutlet.

17. Thisapparatusmustbeearthed(grounded)byconnectingtoacorrectlywiredandearthedpoweroutlet.

18. Ensurethatyourmainssupplyisinthecorrectrangefortheinputpowerrequirementoftheunit.

19. Inordertoreducetheriskofelectricalshock,thepowercordmustbedisconnectedwhenthepowersupplyassemblyisremoved.

20. Thisequipmentisdesignedtomountinasuitablyventilated19rack;ensurethatanyventilationslotsintheunitarenotblockedorcovered.

21. Themainspowerdisconnectdeviceforthisunitisthepluginmainscordratherthanapowerswitch.Themainscordmustremainreadilyaccessiblefordisconnectingmainspower.

22. Toavoidexposuretodangerousvoltagesandtoavoiddamagetotheunit,donotconnecttherearpanelEthernetporttotelephonecircuits.

23. Asthecolorsofthecoresinthemainsleadmaynotcorrespondwiththecoloredmarkingsidentifyingtheterminalsinyourplug,proceedasfollows: Thegreenandyellowcoremustbeconnectedtotheterminalintheplug

identifiedbytheletterE,orbytheearthsymbol ,orcoloredgreen,orgreenandyellow.

ThebluecoremustbeconnectedtotheterminalmarkedwiththeletterNorcoloredblack.

ThebrowncoremustbeconnectedtotheterminalmarkedwiththeletterLorcoloredred.

24. Thisapparatusmustbeearthed.

Fuses

WEEE

PRODUCTENDOFLIFEINFORMATION

Warning: Checkthatthecorrectfuseshavebeeninstalled.Forcontinuedprotectionagainstriskoffire,replaceonlywithfusesofthesametypeandrating.

ThisproductwasdesignedandbuiltbyDolbyLaboratoriestoprovidemanyyearsofservice,andisbackedbyourcommitmenttoprovidehighqualitysupport.Wheniteventuallyreachestheendofitsserviceablelife,itshouldbedisposedofinaccordancewithlocalornationallegislation.Forcurrentinformationpleasevisitourwebsiteat:http://www.dolby.com/environment

iv Dolby CP750 Digital Cinema Processor Manual

Regulatory NoticesIMPORTANTSAFETYNOTICEThisunitcomplieswithsafetystandardEN60065asappropriate.Theunitshallnotbeexposedtodrippingorsplashingandnoobjectsfilledwithliquids,suchascoffeecups,shallbeplacedontheequipment.Toensuresafeoperationandtoguardagainstpotentialshockhazardorriskoffire,thefollowingmustbeobserved:o Ensurethatyourmainssupplyisinthecorrectrangefortheinputpowerrequirementoftheunit. o Ensurefusesfittedarethecorrectratingandtypeasmarkedontheunit.o Theunitmustbeearthedbyconnectingtoacorrectlywiredandearthedpoweroutlet.o Thepowercordsuppliedwiththisunitmustbewiredasfollows:

LiveBrownNeutralBlueEarthGreen/Yellow

IMPORTANTNOTEDESECURITECematerielestconformelanormeEN60065.Nepasexposercetappareilauxclaboussuresouauxgouttesdeliquide.Nepasposerdobjetsremplisdeliquide,telsquedestassesdecaf,surlappareil.Pourvousassurerdunfonctionnementsansdangeretdeprvenirtoutchoclectriqueoutoutrisquedincendie,veillezobserverlesrecommandationssuivantes.o Leselecteurdetensiondoittreplacsurlavaleurcorrespondantevotrealimentationrseau.o Lesfusiblesdoiventcorrespondrelavaleurindiquesurlemateriel.o Lematerieldoittrecorrectementrelilaterre.o Lecordonsecteurlivraveclematerieldoittrecabldelamaniresuivante:

PhaseBrunNeutreBleuTerreVert/Jaune

WICHTIGERSICHERHEITSHINWEISDiesesGertentsprichtderSicherheitsnormEN60065.DasGertdarfnichtmitFlssigkeiten(Spritzwasserusw.)inBerhrungkommen;stellenSiekeineGefe,z.B.Kaffeetassen,aufdasGert.FrdassichereFunktionierendesGertesundzurUnfallverhtung(elektrischerSchlag,Feuer)sinddiefolgendenRegelnunbedingteinzuhalten:o DerSpannungswhlermuaufIhreNetzspannungeingestelltsein.o DieSicherungenmsseninTypundStromwertmitdenAngabenaufdemGertbereinstimmen.o DieErdungdesGertesmubereinegeerdeteSteckdosegewhrleistetsein.o DasmitgelieferteNetzkabelmuwiefolgtverdrahtetwerden:

PhasebraunNulleiterblauErdegrn/gelb

NORMEDISICUREZZAIMPORTANTEQuestaapparecchiaturastatacostruitainaccordoallenormedisicurezzaEN60065.Ilprodottonondeveesseresottopostoaschizzi,spruzziegocciolamenti,enessuntipodioggettoriempitoconliquidi,comeadesempiotazzedicaff,deveessereappoggiatosuldispositivo.Perunaperfettasicurezzaedalfinedievitareeventualirischidiscossalettricaodincendiovannoosservateleseguentimisuredisicurezza:o Assicurarsicheilselettoredicambiotensionesiaposizionatosulvalorecorretto.o Assicurarsichelaportataediltipodifusibilisianoquelliprescrittidallacasacostruttrice.o Lapparecchiaturadeveavereuncollegamentodimessaaterrabeneseguito;anchelaconnessioneretedeve

avereuncollegamentoaterra.o Ilcavodialimentazioneacorredodellapparecchiaturadeveesserecollegatocomesegue:

FilotensioneMarroneNeutroBluMassaVerde/Giallo

AVISOIMPORTANTEDESEGURIDADEstaunidadcumpleconlanormadeseguridadEN60065.Launidadnodebeserexpuestaagoteososalpicadurasynodebencolocarsesobreelequiporecipientesconliquidos,comotazasdecafe.Paraasegurarseunfuncionamientoseguroyprevenircualquierposiblepeligrodedescargaoriesgodeincendio,sehandeobservarlassiguientesprecauciones:o Asegresequeelselectordetensinestajustadoalatensincorrectaparasualimentacin.o Asegresequelosfusiblescolocadossondeltipoyvalorcorrectos,talcomosemarcaenlaunidad.o Launidaddebeserpuestaatierra,conectndolaaunconectorderedcorrectamentecableadoypuestoatierra.o Elcablederedsuministradoconestaunidad,debesercableadocomosigue:

VivoMarrnNeutroAzulTierraVerde/Amarillo

VIKTIGASKERHETSTGRDER!DennaenhetuppfyllerskerhetsstandardEN60065.Enhetenfrejutsttasfryttreverkansamtfremlinnehllandevtska,ssomkaffemuggar,frejplacerasputrustningen.Frattgaranteraskerhetenochgarderamoteventuellelchockellerbrandrisk,mstefljandeobserveras:o Kontrolleraattspnningsvljarenrinstlldpkorrektntspnning.o Konrolleraattskringarnaravrtttypochfrrttstrmstyrkassomanvisningarnapenhetenfreskriver.o Enhetenmstevarajordadgenomanslutningtillettkorrektkopplatochjordateluttag.o Elsladdensommedfljerdennaenhetmstekopplasenligtfoljande:

FasBrunNeutralBlJordGrn/Gul

BELANGRIJKVEILIGHEIDSVOORSCHRIFT:DezeunitvoldoetaandeEN60065veiligheidsstandaards.Ditapparaatmagnietwordenblootgesteldaanvocht.Vanwegehetrisicodaterdruppelsinhetapparaatvallen,dientuergeenvloeistoffeninbekersopteplaatsen.Vooreenveiliggebruikenomhetgevaarvanelectrischeschokkenenhetrisicovanbrandtevermijden,dienendevolgenderegelsinachttewordengenomen:o ControleerofdespanningscarousselophetjuisteVoltagestaat.o Gebruikalleenzekeringenvandeaangegeventypenenwaarden.o Aansluitingvandeunitalleenaaneengeaardewandcontactdoos.o Denetkabeldiemetdeunitwordtgeleverd,moetalsvolgtwordenaangesloten:

FaseBruinNulBlauwAardeGroen/Geel

GB

F

D

I

E

S

NLDolby CP750 Digital Cinema Processor Manual v

Regulatory NoticesFigureii3

Figureii1 Thissymbolthatappearsontheunitrearpanelisintendedtoalerttheusertothepresenceofuninsulateddangerousvoltagewithintheproductsenclosurethatmaybeofsufficientmagnitudetoconstituteariskofelectricshocktopersons.Figureii2

Figureii4 Thissymbolisintendedtoalerttheusertothepresenceofimportantsafetyoperatingandmaintenanceinstructions.Figureii5 vi Dolby CP750 Digital Cinema Processor Manual

Table of ContentsDolby CP750 Digital Cinema Processor Manual vii

Chapter 1 Introduction1.1 About This Manual..............................................................................................................21.2 CP750 Front Panel .............................................................................................................2

1.2.1 Front-Panel Menu Navigation Buttons .....................................................................31.2.2 Front-Panel Status Display ......................................................................................31.2.3 Mute Button..............................................................................................................41.2.4 Main Fader Knob .....................................................................................................41.2.5 USB Port ..................................................................................................................51.2.6 Digital Input Selection Buttons .................................................................................51.2.7 Valid Input LEDs ......................................................................................................51.2.8 Analog Inputs ...........................................................................................................6

1.3 CP750 Rear Panel..............................................................................................................61.3.1 AC Input ...................................................................................................................71.3.2 Backup Power Port ..................................................................................................71.3.3 Ethernet Port............................................................................................................71.3.4 RS-232 Serial Port ...................................................................................................71.3.5 Remote Connector...................................................................................................71.3.6 4xAES IN Connector................................................................................................71.3.7 Automation Connector .............................................................................................81.3.8 1x AES In Connectors..............................................................................................81.3.9 Opt In Connector......................................................................................................81.3.10 NonSync Input Connector .......................................................................................81.3.11 Aux Out Connectors ................................................................................................81.3.12 H/I Out Connector....................................................................................................91.3.13 Mic. Gain .................................................................................................................91.3.14 Mic. Input .................................................................................................................91.3.15 Main Audio Output Connector .................................................................................91.3.16 Multi-Channel Analog Input Connector....................................................................9

1.4 Questions or Feedback ......................................................................................................9

Chapter 2 Installation2.1 CP750 Floating Signal Grounds .......................................................................................112.2 Digital Audio Inputs...........................................................................................................11

2.2.1 Consumer Interface Standards for Digital Audio....................................................122.2.2 Cable Issues ..........................................................................................................122.2.3 Multiple Sources: Conversion Between Interface Standards.................................12

2.3 Mounting the CP750.........................................................................................................132.4 Connections......................................................................................................................132.5 Fuse Information...............................................................................................................132.6 Mains Power Wiring..........................................................................................................142.7 Cable Diagram..................................................................................................................14

Table of Contents Chapter 3 Installing, Launching, and Connecting the Setup Software3.1 System Requirements ......................................................................................................173.2 Installing the Software ......................................................................................................173.3 Connecting the Hardware.................................................................................................183.4 Launching the Setup Application ......................................................................................183.5 Connecting to a Local or Remote Device .........................................................................18

Chapter 4 Configuring the CP750 Software4.1 Using the Application Tabs to Configure a CP750 ...........................................................21

4.1.1 Profile Tab..............................................................................................................214.1.2 Network/Time Tab..................................................................................................224.1.3 General Settings ....................................................................................................244.1.4 Input Settings .........................................................................................................254.1.5 Digital Input 1 .........................................................................................................254.1.6 Digital Inputs 2, 3, and 4 ........................................................................................284.1.7 Analog Input...........................................................................................................294.1.8 Nonsync Input ........................................................................................................294.1.9 Mic Input ................................................................................................................30

4.2 Saving Settings in a Configuration File.............................................................................314.3 Loading a Saved Configuration File .................................................................................314.4 Using Expert View ............................................................................................................324.5 Updating the CP750 Firmware .........................................................................................32

Chapter 5 Playing Dolby Surround 7.1 Audio5.1 Required Software............................................................................................................355.2 Cable Connections ...........................................................................................................355.3 Connecting a DSP100 to a CP750 ...................................................................................365.4 Connecting a DSS200 to a CP750 ...................................................................................375.5 Manually Change the Audio Output of the DSP100 .........................................................375.6 Update Surround Speaker Wiring.....................................................................................385.7 HI and VI-N Channels.......................................................................................................385.8 Using the Correct Decode Mode ......................................................................................385.9 Managing Decode Mode Switches with v.4.2.0 Software.................................................395.10 Managing Decode Mode Switches with Prior Software ....................................................395.11 Using Software to Configure the CP750 for Dolby Surround 7.1......................................395.12 Calibration and Alignment ...............................................................................................395.13 Setting the Decode Mode of the CP750 ...........................................................................405.14 Manually Configuring the CP750 for Dolby Surround 7.1.................................................405.15 Serial and Ethernet ..........................................................................................................41

Chapter 6 Aligning the Auditorium6.1 Checking Theatre Equipment ...........................................................................................43

6.1.1 Speakers................................................................................................................436.1.2 Amplifiers ...............................................................................................................446.1.3 Air Conditioning......................................................................................................44

6.2 Microphone Placement .....................................................................................................446.3 Initial Setup.......................................................................................................................456.4 Calibrating the Internal SPL Meter ...................................................................................46viii Dolby CP750 Digital Cinema Processor Manual

Table of Contents6.5 Initial Output-Level Adjustment.........................................................................................476.5.1 Setting Main Channel Levels .................................................................................476.5.2 Subwoofer Levels ..................................................................................................48

6.6 Room Equalization ...........................................................................................................496.6.1 Setting Bulk EQ......................................................................................................506.6.2 Using EQ Assist .....................................................................................................506.6.3 Making Fine Adjustments to Individual Bands .......................................................506.6.4 Adjusting LFE Channel EQ....................................................................................50

6.7 Final Output-Level Calibration ..........................................................................................516.7.1 Main Channels .......................................................................................................516.7.2 Subwoofer Channel Level......................................................................................516.7.3 Subwoofer Speaker Polarity Check .......................................................................52

6.8 Final Sound Check ...........................................................................................................526.9 Nonsync Level Adjustment ...............................................................................................526.10 Noise Floor Optimization ..................................................................................................53

Chapter 7 Remote Control and Monitoring7.1 Status Monitoring and Level Control in the Setup Software .............................................557.2 ASCII Control....................................................................................................................55

7.2.1 Connections ...........................................................................................................557.2.2 Command Syntax ..................................................................................................567.2.3 Command Set ........................................................................................................56

7.3 SNMP ...............................................................................................................................59

Chapter 8 Technical Reference8.1 CP750 Specifications .......................................................................................................61

8.1.1 Audio Inputs ...........................................................................................................618.1.2 Audio Outputs ........................................................................................................618.1.3 Other Input/Output .................................................................................................628.1.4 Audio Processing ...................................................................................................638.1.5 Other Parameters ..................................................................................................638.1.6 Optional Accessories Ordered Separately.............................................................648.1.7 Power Requirements .............................................................................................648.1.8 Construction...........................................................................................................648.1.9 Dimensions and Weight .........................................................................................648.1.10 PC Connection ......................................................................................................648.1.11 Input Selector Buttons ...........................................................................................648.1.12 Indicators ...............................................................................................................648.1.13 Environmental Conditions......................................................................................648.1.14 Regulatory Notices ................................................................................................65

8.2 Rear-Panel Connector Descriptions and Types ...............................................................658.2.1 Backup Power Connector ......................................................................................658.2.2 RS-232 Serial Port .................................................................................................668.2.3 Remote Fader Connector ......................................................................................668.2.4 4xAES IN Connector..............................................................................................678.2.5 Automation Connector ...........................................................................................678.2.6 Mic. Input Connector..............................................................................................688.2.7 Main Audio Output Connector................................................................................698.2.8 Multichannel Input Connector ................................................................................698.2.9 RS-232 ASCII String Commands...........................................................................71Dolby CP750 Digital Cinema Processor Manual ix

Table of Contents 8.3 Remote Commands and Control ......................................................................................718.3.1 Serial......................................................................................................................718.3.2 Ethernet .................................................................................................................72

Chapter 9 Replacement Parts........................................................................................................73x Dolby CP750 Digital Cinema Processor Manual

List of FiguresDolby CP750 Digital Cinema Processor Manual xi

Figure 1-1 CP750 Front Panel ................................................................................................................ 2Figure 1-2 Front-Panel Display ............................................................................................................... 4Figure 1-3 Fader Characteristic .............................................................................................................. 5Figure 1-4 CP750 Rear Panel................................................................................................................. 6Figure 2-1 Star Washers and Rack-Mounting Screws.......................................................................... 13Figure 2-2 CP750 Inputs and Outputs .................................................................................................. 15Figure 3-1 Installer Welcome Screen.................................................................................................... 17Figure 3-2 Running the Installer Without Administrator Privileges........................................................ 18Figure 3-3 Action Menu......................................................................................................................... 19Figure 4-1 Profile Tab ........................................................................................................................... 22Figure 4-2 Network/Time Tab ............................................................................................................... 23Figure 4-3 General Settings Tab........................................................................................................... 24Figure 4-4 Digital Input 1 Tab ............................................................................................................... 26Figure 4-5 Digital Input 2 Tab ............................................................................................................... 28Figure 4-6 Analog Input Tab ................................................................................................................. 29Figure 4-7 Nonsync Input Tab .............................................................................................................. 30Figure 4-8 Mic Input Tab....................................................................................................................... 31Figure 4-9 Selecting Save in the File Menu .......................................................................................... 31Figure 4-10 Selecting Open in the File Menu ......................................................................................... 32Figure 4-11 Expert View Window............................................................................................................ 32Figure 4-12 Dolby Software Update Screen ........................................................................................... 33Figure 5-1 DSP100 Rear Panel with Cable Connections ..................................................................... 36Figure 5-2 DSS200 Rear Panel with Cable Connections ..................................................................... 37Figure 5-3 CP750 Front-Panel Menu Button ........................................................................................ 40Figure 5-4 Confirm Button..................................................................................................................... 41Figure 5-5 Dolby 7.1 Decode Mode ...................................................................................................... 41Figure 6-1 Microphone Placement for Equalization .............................................................................. 44Figure 6-2 Alignment Tab Showing Room Levels................................................................................. 46Figure 6-3 Channel Tune Tab Showing the Center Channel................................................................ 48Figure 6-4 Channel Tune Tab Showing LFE EQ .................................................................................. 49Figure 7-1 Virtual Status Monitor .......................................................................................................... 55Figure 8-1 Backup Power Connector Detail.......................................................................................... 65Figure 8-2 Cat. No. 868 Remote Fader Connector Detail..................................................................... 66Figure 8-3 Mic. Input Connector Detail ................................................................................................. 68

List of TablesDolby CP750 Digital Cinema Processor Manual xii

Table 1-1 Digital Input Selection Button Functionality ............................................................................5Table 1-2 Analog Input Options ..............................................................................................................6Table 2-1 Examples of Available Balanced/Unbalanced Adapters.......................................................12Table 5-1 DSP100 Output Connector Pinout........................................................................................36Table 5-2 DSS200 Audio Output Pinout ...............................................................................................37Table 5-3 ASCII String Commands ......................................................................................................41Table 7-1 Normal Commands...............................................................................................................56Table 7-2 Supported MIB-2 MIBS.........................................................................................................59Table 7-3 Other Standard MIBs............................................................................................................59Table 7-4 V3 MIBS ...............................................................................................................................59Table 8-1 Rear-Panel Connector Descriptions and Types ...................................................................65Table 8-2 Backup Power Connector Pinout..........................................................................................66Table 8-3 Serial Port Pinout..................................................................................................................66Table 8-4 Remote Fader Connector Pinout..........................................................................................66Table 8-5 4xAES IN Connector Pinout .................................................................................................67Table 8-6 Automation Connector Pinout...............................................................................................67Table 8-7 Mic. Input Connector Pinout .................................................................................................68Table 8-8 Main Audio Output Connector Pinout ...................................................................................69Table 8-9 Multichannel Audio Input Connector Pinout .........................................................................69Table 8-10 ASCII String Commands ......................................................................................................71Table 9-1 Available Replacement Parts ...............................................................................................73

Chapter 1

IntroductionDolby CP750 Digital Cinema Processor Manual 1

TheDolbyCP750DigitalCinemaProcessorisadirectresultofDolbyLaboratoriescontinuedleadershipinthedevelopmentofinnovativecinematechnologies.TheCP750isaselfcontained,alldigitalcinemaprocessor.ItsupportsPCMandDolbyDigitalaudio,aswellasDolbyDigitalSurroundEXTM,DolbyProLogic,andDolbyProLogicIIplayback.WiththeCP750,youcanpresenthighqualityaudiofromthefollowingaudiosourcesandformats:

DolbyDigitalCinemasystem Onscreenadvertisingservers DigitalVTRs DigitalsatelliteorcableTVreceivers BlurayDiscTM DVDs

PCM DolbyDigitalconsumerbitstreamsTheCP750providesanalogaudioinputsfor: Anexternalsixoreightchannelprocessor Anonsyncsource ApublicaddressmicrophoneItsanalogaudiooutputsarebalanced,withamultipinconnectorconfiguredtotheTHXstandard.BuiltinEthernet,USB,andserialinterfacesaccommodatePCcontrolandcinemanetworkconnectivity.Anindependentlyadjustableglobalaudiodelayisassignedtoeachinputtoensurethatsoundandpictureareperfectlysynchronizedduringdigitalcinemapresentations.Differentdelayscanbeassignedtodifferentinputs,providingflexibilityforalternativecontentsources,whichoftenrequiredifferentdelays.TheCP750iscompatiblewithexistingtheatreautomationsystemsandASCIIcommandstrings.Itsabilitytohandlemultipleformatsandfutureupgradesmakeitanessentialtoolforanevolvingdigitalcinemamarket.Installationissimplifiedbybuiltintestinstrumentationthatincludesarealtimeanalyzerandsignalgeneratorsforpinknoise,sweeptones,tones,andaphasecheckthumper.Thirdoctaveequalization,plusbassandtrebletrimcontrols,areprovidedforallchannels.AdigitalparametricequalizerisprovidedfortheSubwooferchannel.Easilyprogrammedinternalsoftwaremanagesaudiosettingsandconfiguration.Thefullfeaturedsoftwarepackagefacilitatesthesetupprocess.

Introduction CalibrationsettingsforoneunitcanbestoredonaPC,and,ifdesired,transferreddirectlytoanotherCP750,minimizingtheneedforadditionalcalibrationafterrepairs.AsimprovementstotheCP750digitalcontrolandprocessingsoftwarearedeveloped,thelatestrevisionsaretransferablefromaPCtotheCP750.OptionsavailablefortheCP750includetheCat.No.868RemoteFaderandCat.No.994ExternalPowerSupply.

1.1 About This ManualThismanualcoversbothinstallationanduseoftheCP750.Followingthisintroductorychapteraresixchaptersthatgivedetailsofvarioustopics: Chapter 2Installation Chapter 3Installing,Launching,andConnectingtheSetupSoftware Chapter 4ConfiguringtheCP750Software Chapter 5PlayingDolbySurround7.1Audio Chapter 6AligningtheAuditorium Chapter 7RemoteControlandMonitoring Chapter 8TechnicalReference Chapter 9ReplacementParts

1.2 CP750 Front PanelTheCP750frontpanelshowninFigure 11includesthefollowingcomponentsfromlefttoright:

Frontpanelmenunavigationbuttons. Statusdisplay. Mutebutton. Mainfaderknob. USBportforfirmwareupgradesandsetupsoftware. Sevenbuttonsthatselectaninputsource:Digital 1,Digital 2,Digital 3,Digital 4,Multi-Ch

Analog,NonSync,andMic. FourLEDsthatindicatethepresenceofaValidsignaloneachdigitalinput.Digital 1

andDigital 4havevalidsignalsinFigure 11.Figure11

Figure 1-1 CP750 Front Panel

Digital Cinema ProcessorDigital Cinema ProcessorCP750

Digital 1Digital 1 Digital 2Digital 2 Digital 3Digital 3 Digital 4Digital 4

Multi-Ch

Analog

Multi-Ch

Analog NonSync Mic.

Valid

Input SelectInput Select2 Dolby CP750 Digital Cinema Processor Manual

CP750 Front Panel1.2.1 Front-Panel Menu Navigation Buttons

Themenucontrolbuttonstotheleftofthedisplay,showninFigure 11,areusedbyboththeoperatorandtheserviceengineertonavigatefrontpanelscreenmenus,selectvariousmenuoptions,andstoresetupdata.Themenubuttonisusedtostepthroughthemenulist.Pressingandreleasingthebuttononcechangesthedisplaytothenextmenuitem.Pressingandholdingthebuttonwhilerotatingthemainfaderknobstepsthedisplaythroughallmenuitems.ThecheckmarkbuttonisusedtoacceptthesettingsdisplayedonthefrontpanelscreenandstoreitinCP750memory.Changestosettingsoccurimmediately,butarenotimmediatelysaved.Thebuttonblinkswhenthereareunsavedparameterchanges.

1.2.2 Front-Panel Status Display

DaytodayoperationoftheCP750isperformedthroughinteractionwiththefrontpanelstatusdisplayshowninFigure 12.

Processing Display

Thetoplinedisplaystheprocessingbeingappliedtotheaudio.Thesupportedprocessesare:

DolbyProLogic DolbyProLogicII DolbyDigital DolbyDigitalSurroundEX Discrete Dolby7.1

Volume Display

Themainfaderlevelisdisplayedasatwodigitnumber.AswithpreviousgenerationsofDolbycinemaprocessors,afadersettingof7.0(0dB)isthenominalcorrectoperatinglevel.7.0matchesthelevelusedduringproductionofthemotionpicture.

Input Display

Thebottomlineofthedisplayshowsthetypeofaudiobeinginput.

Meter Display

ThecircleoflightssurroundingthedisplaytextservesaschannelmeterswhentheCP750isinuse.

Caution: Donotdisconnectpowertotheunitwhilethecheckmarkbuttonisblinking.Dolby CP750 Digital Cinema Processor Manual 3

Introduction Figure12

Figure 1-2 Front-Panel Display

1.2.3 Mute Button

PressingthemutebuttonshowninredinFigure 11fadestheaudiooutputtoallchannelswithoutdisturbingthecurrentmainfadersetting.Fadeinandfadeoutspeedsareseparatelyadjustablefrom0.2to5seconds,usingthePCsetupsoftware.Themutebuttonflashesredwhenactivated.

1.2.4 Main Fader Knob

Usethisknobtoadjustthesoundlevel.Afaderreadingof7.0isthenominalcorrectoperatinglevel.Themainfaderknobrotatescontinuouslywithnoendstops.Theknobisalsousedtoadjustparametersduringsetupoperations.Whenthefaderknobisrotatedbetweenreadingsof0and4.0,theoutputlevelchangesin20dBstepsbetween90and10dB.Whenthefaderknobisrotatedbetweenreadings4.0and10,theoutputlevelchangesin3.33dBstepsbetween10and10dB.Figure 13showsthecharacteristicgraph.

LeftCenter

Right

Processing

Volume

Input

Subwoofer

Left Surround Right Surround4 Dolby CP750 Digital Cinema Processor Manual

CP750 Front PanelFigure13

Figure 1-3 Fader Characteristic

1.2.5 USB Port

TheUSBportisprovidedforconnectingtoaPC.YoucanuseiteithertosetuptheunitortoupdatetheCP750firmware.

1.2.6 Digital Input Selection Buttons

WhenyoupressanyoftheDigital 1,Digital 2,Digital 3,orDigital 4 pushbuttons,thatbuttonlightsup,indicatingthattheselectedinputchannelisactive.Pressingoneofthesebuttonsselectsaspecificdigitalinputsource,asshowninTable 11. TheCP750switchesautomaticallybetweenPCMandDolbyDigitalbitstreams.

1.2.7 Valid Input LEDs

EachdigitalinputpushbuttonhasagreenValidLEDlocatedbeneathit.TheseLEDslightupwhentheCP750detectsavalidsignalontherespectiveinput,whetherornottheinputisselected.Digital 1andDigital 4havevalidsignalsinFigure 11.

Table 1-1 Digital Input Selection Button Functionality

Input Button Input Source SelectedDigital 1 Selectstheinputsignalfromthe4xAESDIGITAL 1 connector(fourchannel

pairs,25pinDconnector)Digital 2 Selectstheinputsignalfromthe1xAESDIGITAL 2connector(BNC)Digital 3 Selectstheinputsignalfromthe1xAESDIGITAL 3connector(BNC)Digital 4 Selectstheinputsignalfromthe1xAESDIGITAL 4connector(S/PDIFoptical)

9

-60

-50

-40

-30

-20

-10

32 4 5 6 7 8

-70

-80

-90

Fader Level

Output

Level (dB)

10

10

0

10

20 dB

per step

3 1/3 db

per stepDolby CP750 Digital Cinema Processor Manual 5

Introduction 1.2.8 Analog Inputs

TheCP750hasthethreeanaloginputslistedinTable 12.

1.3 CP750 Rear PanelFigure14

Figure 1-4 CP750 Rear Panel

TheCP750rearpanel,showninFigure 14,includesthefollowingcomponents: ACinput. BACKUP POWER:4prongfemaleXLRconnectorforusewiththeCat.No.994

ExternalPowerSupply. Ethernet:RJ45portforremotecontrolthroughASCIIcommandstrings,DolbyDigital

CinemaTheatreManagementSoftware,unitsetup,andfirmwareupdates.SeeSection 8.2.9fordetailsonthecommandstrings.

RS-232:9pinfemaleDconnectorforcontrolviaASCIIcommandstrings.9600baud,noparity,1stopbit.SeeSection 8.2.9fordetailsonthecommandstrings.SeeSection 8.2.2forpinoutdetails.

REMOTE:RJ45portforcommunicationwiththeCat.No.868RemoteFader.SeeSection 8.2.3forpinoutdetails.ThisisnotanEthernetconnectionbutcanbeconnectedwithanystandardEthernetcable.

4xAES IN:25pinfemaleDconnectorlabeledDIGITAL 1carryingfourdigitalchannelpairs.SeeSection 8.2.4forpinoutdetails.

AUTOMATION:25pinfemaleDconnectorforcinemaautomationcontrol.SeeSection 8.2.5forpinoutdetails.

Two1xAES IN:BNCconnectorslabeledDIGITAL 2andDIGITAL 3. OPT IN:OpticalS/PDIFinputconnectorlabeledDIGITAL 4. NONSYNC INPUT:2RCAjackslabeledLandRthataccept3 VRMSmaximuminput. AUX OUT:RCAjackslabeled7and8alwayscarrychannelpair7/8ofthe4xAESinput.

Ifpresent,HIandVINsignalslikelyusethispair.

Table 1-2 Analog Input Options

Analog Input Rear-Panel Input Source SelectedMulti-Ch Analog SelectstheinputsignalfromtheMULTI-CHANNEL ANALOG INPUTconnector

(eightchannels,25pinDconnector)NonSync SelectstheinputsignalfromtheNONSYNC INPUTLandRRCAjacksMic. SelectstheinputsignalfromtheMIC. INPUT3prongXLRconnector

Note: TheCP750supports10BaseTand100BaseTdatarates.GigabitEthernetdatarateisnotsupported.

MULTI-CHANNEL

ANALOG INPUT

MAIN

AUDIO OUTPUT4xAES IN

OPT IN1xAES IN

DIGITAL 3 DIGITAL 4DIGITAL 2AUTOMATION

DIGITAL 1

NOT ETHERNET

ETHERNET REMOTE

LINKACT

8

H/I

OUT

AUX

OUT

7

MIC.

INPUTBACK-UP

POWER

R

L

NONSYNC

INPUT

RS-232

Dolby, Pro Logic and the double-D symbolare registered trademarks of Dolby Laboratories.

Digital Cinema ProcessorCP750

Risk of electric shock.

Do not open.

This equipment must be

earthed/grounded.

No user serviceable parts

inside. Refer all service

to qualified personnel.

CAUTIONTo reduce the risk of fire

replace only with same

type and rating

250V time-lag fuse.

FUSE T 3.15A L

5 mm x 20 mm

This device complies with Part 15 of the FCC Rules.Operation is subject to the following two conditions: (1) thisdevice may not cause harmful interference, and (2) thisdevice must accept any interference received, includinginterference that may cause undesired operation.

This Class A digital apparatus complies with Canadian ICES003.

MIC.

GAIN

100240 Vac 5060 Hz 30W~

25

PROFESSIONAL AUDIOEQUIPMENT 4J06

LISTED

C USUL

PUSH6 Dolby CP750 Digital Cinema Processor Manual

CP750 Rear Panel H/I OUT:RCAjackforhearingimpairedoutput.ThisisacenterweightedsumofLCR.

MIC. GAIN:Foradjustingthegainofthemicrophonepreamp. MIC. INPUT:3pinfemaleXLRconnectorforaPAorauditoriumequalization

microphone.Phantompowercanbeappliedusingthesetupsoftware. MAIN AUDIO OUTPUT:25pinfemaleDconnectorbalancedaudiooutputtothe

auditoriumsoundsystem.SeeSection 8.2.7forpinoutdetails. MULTI-CHANNEL ANALOG INPUT:25pinfemaleDconnectorcarryingeightbalanced

analogchannels.SeeSection 8.2.7forpinoutdetails.

1.3.1 AC Input

ThisisasimpleunswitchedIECpowerinletmodule.

1.3.2 Backup Power Port

ThisisafourpinfemaleXLRconnectorforusewiththeCat.No.994ExternalPowerSupply.

1.3.3 Ethernet Port

ThisisanilluminatedRJ4510/100BaseTEthernetportwithactivityLEDs,whichprovidesaninterfacetoaDolbyDigitalCinemanetworkandalsoASCIIstringcommandsoverTCPtoport61408.Youcanalsousethisportforsetupsoftwareandfirmwareupgrades.

1.3.4 RS-232 Serial Port

YoucanusethisportforserialcontrolusingASCIIstringcommands.Theequipmentconnectedtothisportshouldhaveitsserialportsetto9600baud,noparity,1stopbit.Useapintopinserialcable.ThesamecontrolfunctionsareavailablethroughtheEthernetport.

1.3.5 Remote Connector

ThisisnotanEthernetconnection,butanEthernetcableisusedtoconnecttotheCat.No.868RemoteFader.

1.3.6 4xAES IN Connector

This25pinfemaleDconnector,linkedtotheDigital 1button, receivesfourAES/EBUstreams.ThefourAESinputsignalsmustbetimealignedwitheachother.Typically,thisinputconnectstoaDolbyDigitalcinemaserver.ItaccommodatesPCMaudioat96,48,and44.1kHz,and32kHz(16,20,and24bits)andDolbyDigitalatalldataratesandsamplerates.ThedecodingofDolbyDigitalisrestrictedtothefirstAES3channelpair.Thisconnectorhasafloatingground.Dolby CP750 Digital Cinema Processor Manual 7

Introduction 1.3.7 Automation Connector

Thisconnectorisusedtoselectanaudioinput,toreadbackthecurrentlyselectedinput,andtoremotelyassertthemutecommand.ThepinoutislistedinSection 8.2.5.Theautomationsubsystemisreferencedtopin12,AutomationReturn.Thisisthegroundforthesefunctions,andisconnectedtothegroundoftheCP750onlythrougha1kresistor.Anisolatedpowersupplyisprovidedsothatconnectiontoautomationsystemscanbemadewithoutintroducinghumduetogroundloops.

Theautomationcontrolsystemisdesignedtoacceptcontactclosureinputs.Aclosedcontactassertsacommand.ThelowsideofthecontactclosingswitchorrelayshouldbeconnectedtoAutomationReturn.

1.3.8 1x AES In Connectors

TheseBNCconnectorsarelinkedtotheDigital 2andDigital 3buttons.TheyaccommodatePCMaudioat96,48,and44.1,and32kHz(16,20,and24bits)andDolbyDigitalatalldataratesandsamplerates.ABNCmaletoRCAfemaleadaptercaninterfacewithmostconsumergear.Theseconnectorshavefloatinggrounds.

1.3.9 Opt In Connector

Thisopticalconnectorislinkedtothe Digital 4button. ItaccommodatesPCMaudioat96,48,44.1,and32kHz(16,20,and24bits)andDolbyDigitalatalldataratesandsamplerates.

1.3.10 NonSync Input Connector

TwoRCAjackslabeledLandRthataccept3 VRMSmaximuminput.

1.3.11 Aux Out Connectors

Theseanalogoutputrepresentschannelpair7/8ofthe4AESinput.Forthetopoutput(labeled7),thesourceischannel7ofthe4AESinput.Noequalizationorlevelcontrolisapplied.Fortheloweroutput(labeled8),thesourceischannel8ofthe4AESinput.Noequalizationorlevelcontrolisapplied.Theseanalogoutputconnectorsrepresenteitherchannelpair7/8ofthe4AESinputortheinputpresentontheDigital 2 input,dependingontheselectedoutputconfigurationandtheHI/VI-N OptionssettingontheGeneral Settingstab.

Caution: TheisolatedpowersupplycanonlyfunctionproperlyiftheAutomationReturnpiniswithin5voltsDC(orpeakAC)oftheCP750chassisground.

Warning: Undernocirumstancesshouldpowerfromanexternalsourcebesuppliedtoanypininthisconnector.ConnectingexternalpowerislikelytodamagetheCP750.8 Dolby CP750 Digital Cinema Processor Manual

Questions or FeedbackIfthe5.1outputconfigurationisselected: Forthetopoutput(labeled7),thesourceischannel7ofthe4AESinput.No

equalizationorlevelcontrolisapplied. Fortheloweroutput(labeled8),thesourceischannel8ofthe4AESinput.No

equalizationorlevelcontrolisapplied.IftheDolbySurround7.1outputconfigurationisselected: Forthetopoutput(labeled7),thesourceischannel1oftheDigital 2 input.No

equalizationorlevelcontrolisapplied. Fortheloweroutput(labeled8),thesourceischannel2oftheDigital 2 input.No

equalizationorlevelcontrolisapplied.

1.3.12 H/I Out Connector

Thehearingimpairedoutputsignal,onthefemaleRCAconnectorlabeledH/I Out, isunbalanced.ItisacenterweightedanalogsumoftheL,C,andRchannels.

1.3.13 Mic. Gain

Thismultiturntrimpotadjuststhegainofthemicpreamp.Ifyouusethemicrophoneinputforpublicaddresspurposes,adjustthiscontrolforthedesiredvolumeintheauditorium.Ifyouuseitonlyforcinemaalignmentpurposes,thetrimpotwillbeadjustedusingthesetupsoftware.

1.3.14 Mic. Input

Thisinputisforusewithabalancedoutputmicrophone.Phantompowerisprovided,andcanbeturnedonandoffundersoftwarecontrolusingthesetupsoftware.

1.3.15 Main Audio Output Connector

Thisconnectorisan8channelanalogoutput(L,C,R,Ls,Rs,SW,Bsl,andBsr),whichispresentonamale25pinDconnector(300mVreferencelevel).BslandBsrchannelsarerequiredforDolbyDigitalSurroundEXinstallations.Forotherinstallationsthesechannelcanbeconfiguredtorepresentchannelpair7/8ofthe4xAESinput.Thesemutuallyexclusiveoptionsareconfiguredinthesetupsoftware.

1.3.16 Multi-Channel Analog Input Connector

Thisconnectorisan8channelanaloginput(L,C,R,Ls,Rs,SW,Bsl,Bsr)designedtoreceive300mVRMS(ref)inputsfromexternalsourcesandinputsonafemale25pinDconnector.Theseinputsarebalancedandfloating,butthecommonmodevoltagemustnotexceed6 Vpeak.

1.4 Questions or FeedbackIfyouhavequestionsorcommentsaboutthisdocument,pleasecontacttechnicalpublications.Dolby CP750 Digital Cinema Processor Manual 9

Ifyouhavetechnicalquestionsaboutthisproduct/technology,pleasecontacttechnicalsupport.

Chapter 2

InstallationDolby CP750 Digital Cinema Processor Manual 11

2.1 CP750 Floating Signal GroundsTheCP750isdesignedtoeliminategroundloops,whichcanoccurwhentheunitisconnectedtomultipleexternalequipmentgrounds.Forthisreason,thefollowingCP750connectorshaveisolatedgrounds: MAIN AUDIO OUTPUTandMULTI-CHANNEL ANALOG INPUT:Eightchannelinputand

outputarebalancedandfloating.NotethatacommonmodesignalbetweentheCP750audiooutputsanditschassisgroundmustnotexceed+6 Vpeak.

AUTOMATIONconnector:Thecommonisfloatingandcanbe+5 Vpeakfromthechassisground.

1xAES IN BNCdigitalinputs:Thesearetransformerisolatedandtheirgroundscanbe+10Vpeakfromthechassisground.

4xAESDconnectordigitalinputs:Thesearetransformerisolatedandtheirgroundscanbe+10Vpeakfromthechassisground.

2.2 Digital Audio InputsTherearetwoprofessionalinterfacestandardsfordigitalaudiotransmission:AES/EBU(alsoknownasAES3)andAES3id.Thesemethodsstreamthesamedigitaldataandprofessionalaudioheaderinformationovercopperconductorlinks,butusedifferenttypesofconductorsandconnectors.AES/EBUusesabalancedconnection(twoconductorsplusshield)withacharacteristicinputimpedanceof110,anominalpeaktopeaksignallevelof5V,and,mostcommonly,XLRconnectors.Thetypicalmaximumtransmissiondistanceis100meters(328feet).AES3idusesanunbalancedconnection(onesignalconductorplusshield)withacharacteristicinputimpedanceof75,peaktopeaksignallevelof1V,andBNC(pushandtwist)connectors.Thetypicalmaximumtransmissiondistanceis1,000meters(3,280feet).

ProfessionaldigitalaudioequipmenttypicallyusestheAES/EBUmethodbecausebalancedoperationyieldssuperiornoiseimmunity,asitdoeswithanalogaudiosignals,andbecauseXLRconnectorsarethestandardonanalogprofessionalaudioequipment.ProfessionalvideoequipmenttypicallyusestheAES3idinterface,withBNCconnectors.AswithXLRconnectorsonprofessionalaudioequipment,theadoptionofBNCconnectorsfortheaudioonprofessionalvideoequipmentstemsfromtheiruseforthevideosignal.Also,theunbalancedAES3idsignalcanconnecttomorethanonepieceof

Note: TheRS232inputgroundisconnectedtotheCP750chassisgroundandisnotfloating.

Installation equipmentbyusingtheloopthroughconnectorsavailableonsomedevices.Thesignalisrobustforlongcableruns.

2.2.1 Consumer Interface Standards for Digital Audio

TheconsumerinterfacestandardfordigitalaudiotransmissionisS/PDIF(IEC61937).S/PDIFusescoaxialunbalancedconnections(onesignalconductorplusshield)withacharacteristicinputimpedanceof75withRCA(phono)connectors,orafiberopticcablelink.Theunbalancedcoaxialconnectionhasapeaktopeaksignallevelof0.5V.Thetypicalmaximumtransmissiondistanceis10meters(33feet).AlthoughS/PDIFspecificcableswithsuitableconnectorscanbepurchased,youcanalsoobtaingoodresultsusinghighquality75videocablewiththeappropriateconnectorsand/oradapters.

2.2.2 Cable Issues

Evenindigitalaudio,noisefreesignalsareveryimportant.Thecableusedfordigitalsignalsisspecificallydesignedforsuchuse,althoughitlooksthesameasthecableusedforanalogaudioorvideosignals.Anyprofessionalaudioequipmentorbroadcastsupplycompanycanprovide110cablewithconnectors(orwithout,ifyoudliketoterminatethemyourself)forAES/EBUconnections,andhighquality75videocableswithBNCconnectorsforAES3idconnections.Useofcablesorconnectorsnotdesignedfordigitaltransmissionorwithincorrectimpedancecompromisestheintegrityofthebitstream.Thiscanresultinunreliablehardwareinterconnections,especiallywithlongcableruns.

2.2.3 Multiple Sources: Conversion Between Interface Standards

AlthoughsomedetailsofthebitstreamsusedintheAESandS/PDIFstandardsaredifferent,theaudioinformationisexactlythesame.Asaresult,mostaudioequipmentacceptseitherstandardwithnoneedtoconvertthebitstreamitself;thisisthecasewiththeCP750.However,ifyouintendtoconnectsourcesacrossdifferenttypesofdigitalaudioinputs,donotattempttoconvertadigitalinterfacetypebydirectlywiringanXLRconnectortoaBNCorRCAplug.Thiscausesanimpedancemismatchandsignalreflections,resultingindigitalwaveformdegradation.Thismayappeartowork,buttheresultsareunreliableanddropoutsoccur.ForconversionbetweentheAES3idandS/PDIFformats,youcanusehighqualityRCAtoBNCadaptersbecausethecableandimpedanceareboththesame(75).ForconversionbetweentheAES/EBUandAES3idorAES/EBUandS/PDIFformats,asimpleandeconomicalmethodusesinlinetransformers.Thesedevicesperformthenecessaryimpedanceandbalanced/unbalancedconversion.Table 21showssomeexamplesofsuitableadapters.TheunbalancedconnectorintheseexamplesisBNC.YoucanaddBNCtoRCAadaptersforconnectingtoconsumerS/PDIFconnections.Thefollowingunitsusepassivecircuitry.

Higherpricedunitsincorporatingactivecircuitryarealsoavailable.Theseofferadditionalfeaturessuchasmultipleinputs,inputsforopticalconnections,andmultipleoutputs.

Table 2-1 Examples of Available Balanced/Unbalanced Adapters

Adapter Type Neutrik Canare

XLRfemale110intoBNCfemale75out NABF BCJXJTRABNCfemale75intomaleXLR110out NABM BCJXPTRA12 Dolby CP750 Digital Cinema Processor Manual

Mounting the CP7502.3 Mounting the CP750Toavoidheatorhumpickupproblems,donotmounttheCP750immediatelyaboveorbelowpoweramplifiers.LocatepoweramplifiersawayfromtheCP750toavoidhumpickupproblems.Alwaysleavea1Uspace(43mm,or1.75in)aboveandbelowtheCP750toprovideadequateventilation.InstallanairguideorbaffletodeflecthotanyaircomingfromequipmentbelowtheCP750.Toensuregoodgroundcontact,installastarwasheronatleastone(andpreferablyall)rackmountingscrewsasshowninFigure 21.Thiswillalsoaidinthepreventionofelectricalnoiseproblems.

Figure21

Figure 2-1 Star Washers and Rack-Mounting Screws

Propershieldingandterminationofcablesandcableassembliesarealsoveryimportant.Followthemethodsshowninthewiringdiagrams.

2.4 ConnectionsToconnecttheCP750toyourauditoriumequipment,refertoFigure 22.Forproperoperationinlocationswherethereisconsiderableinterference,strictlyadheretothecabletypes,lengths,andpinassignments.Shieldsmustconnectonlytothechassisandshouldnotbeparalleledwiththenegativesideofinputsoroutputs.ConnectorpinoutsarelistedinSection 8.2.

2.5 Fuse InformationTheCP750usesauniversalswitchingpowersupplythathandlesthefullrangeofnominalmainsvoltagesbetween100and240VAC,andanyfrequencybetween50and60 Hz.Ifapowersupplyfuseinsidetheunitblows,donotattempttoreplaceit.Instead,contactDolbyLaboratories.Thefuseontheunitrearpanelisintendedtobereplaceable.Ifitblows,replaceitwithafuseofthesametype.Dolby CP750 Digital Cinema Processor Manual 13

Installation 2.6 Mains Power WiringInsomecountries,theprimarymainscablemaynothaveaconnectorfitted.Nonterminatedleadsmustbeproperlywiredtoanapprovedmainsconnectorinaccordancewiththefollowinginternationalcode:

Brownwire:liveorhot Bluewire:neutral Greenwire:mainsground

2.7 Cable DiagramThecablediagramfortheCP750rearpanelisshowninFigure 22.

Warning: IfyouareuncertainaboutthewiringofyourACmainsoutlet,donotuseit.Consultaqualifiedelectrician.14 Dolby CP750 Digital Cinema Processor Manual

Installation Cable Diagram

15

Figure22

Notes:

1. Follow all local electrical and building codes.

2. Use earthed (grounded) conduit wherever possible. Avoid routing signal wiring near electric motors, rectifiers, power wiring, dimmer wiring, or other sources of electrical noise.

3. For two-conductor with shield wiring, use Belden 8451 two-conductor shielded cable or equivalent: tinned copper, twisted pair, 22 AWG stranded tinned copper drain wire, aluminum-polyester shield, 100 percent shield coverage, conductor to conductor (111 pF per meter).

4. All shields must be connected to the chassis of the CP750 or DSP100/DSS200 rather than to circuit (audio) ground. This achieves the RF interference immunity required by European EMC standards. For D-connectors, a metal housing must be used and the shields must be connected

CP750 INSTALLATION WIRING

{

H/I OUT channel 7 (if present)

Eight-channel Analog Input(all unlabeled pins are ground)normal operating level = 300 mV

L-L+BSL-BSL+C-C+BSR-BSR+R-R+LS-LS+RS-RS+SW-SW+

1423

161756

19208

102311241225Dolby DMA8Plus Digital Media Adapter Manual

Figure 2-2 CP750 Inputs and Outputs

F9110270_3A.CDR

black

redL + C + R

{

{{

CD or DVD Player

{

BSR

BSL

Red: 19

Black: 6

Red: 16

Black: 3

Mic.NonSync

Multi-Ch AnalogDigital 4Digital 3Digital 2Digital 1

Red: 8

AutomationInput

Auditorium Network

Cat. No. 994Back-up Power Supply

( Optional)

Cat. No. 868 Remote Fader(Optional)

4X AES SourceEight-channel PCM

from Server

Non-syncSource

HearingImpaired

System

PA Microphone Input(Or Mic-multiplexer for setup)

Screen Speakers

Surround Speakers

Surround EX/7.1Speakers

Unbalanced Input amplifierone channel shown, applicable to all

{Digital Inputs:PCM

Dolby Digital ( AC-3)

MULTI-CHANNEL

ANALOG INPUT

MAIN AUDIO OUTPUT4xAES IN

OPT IN1xAES IN

DIGITAL 3 DIGITAL 4DIGITAL 2AUTOMATION

DIGITAL 1

NOT ETHERNET

ETHERNET REMOTE

LINKACT

8

H/IOUT

AUXOUT

7

MIC. INPUTBACK-UP

POWER

R

L

NONSYNCINPUT

RS-232

Dolby, Pro Logic and the double-D symbol are registered trademarks of Dolby Laboratories.

Digital Cinema ProcessorCP750

Risk of electric shock.Do not open.

This equipment must beearthed/grounded.

No user serviceable partsinside. Refer all serviceto qualified personnel.

CAUTIONTo reduce the risk of firereplace only with same

type and rating250V time-lag fuse.

FUSE T 3.15A L

5 mm x 20 mm

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This Class A digital apparatus complies with Canadian ICES003.

MIC.

GAIN

100240 Vac 5060 Hz 30W~

25PROFESSIONAL AUDIOEQUIPMENT 4J06

LISTED

C USUL

PUSH

Chapter 3

Installing, Launching, and ConnectingDolby CP750 Digital Cinema Processor Manual 17

the Setup Software

TheCP750isdesignedandbuilttobesetupandadministeredremotelybysoftware.Onceinstalledandconfigured,theCP750remoteapplicationgivesyouaccesstoallunitfunctions.

BeginbyinstallingthesoftwareonaPC,whichyoucanconnecttotheCP750withaUSBcable.

3.1 System RequirementsTheCP750setupsoftwarerunsonMicrosoftWindowsXPandWindowsVista.

3.2 Installing the SoftwareToinstalltheCP750setupapplication:1. OpentheCP750 SetupfolderandrunCP750Setup_x_x_x.exe.Thisfileisnamedwith

thecurrentsoftwareversionnumber.TheinstalleropensdisplayingthescreenshowninFigure 31.

Figure31

Figure 3-1 Installer Welcome Screen

2. Selectthedesiredlanguage.3. Followthescreenprompts.

Installing, Launching, and Connecting the Setup Software Werecommendrunningtheinstallerasanadministrator.Ifyouruntheinstallerwithoutadministrativeprivileges,youwillnotbeabletoconnecttotheCP750viaUSB.TheinstallergeneratesthewarningshowninFigure 32..

Figure32

Figure 3-2 Running the Installer Without Administrator Privileges

3.3 Connecting the HardwareTherearethreewaystoconnectcomputerhardwaretotheCP750. TheUSBportonthefrontpaneloftheunit,showninFigure 11,isexpresslydesigned

foreasyconnectiontolaptopcomputerswithastandardAtoBcable. YoucanconnectdirectlytotheEthernetconnectorontheunitrearpanel.Ifyour

laptopsupportsGigabitEthernet,useastandardEthernetcable.Otherwise,useacrossovercable.

YoucanconnectapintopinserialcabletotheRS-232connectorontheunitrearpanel.

3.4 Launching the Setup ApplicationTolaunchtheCP750setupapplication,clicktheStartbuttonandscrolltoPrograms.IntheDolbyfolder,doubleclickDolbyCP750Setup.TheDolbyCP750setupwindowappears,asshowninFigure 41.

3.5 Connecting to a Local or Remote Device YoucanusethesetupsoftwareActionmenu,showninFigure 33,toconnecttoalocaloraremotedevice.18 Dolby CP750 Digital Cinema Processor Manual

Connecting to a Local or Remote DeviceFigure33

Figure 3-3 Action Menu

TheseoptionsallowyoutoconnecttoaCP750thatiseitherconnectedtoyourPC(localdevice)orconnectedtoanEthernetnetwork(remotedevice).Ifyouselect Connecttoremotedevice, thesystempromptsyoutoenteranIPaddress.YoumustchangeTCP/IPpropertiesofyourlaptoptocommunicateproperlywiththeCP750whenconnectingthesetupsoftwaretoaCP750usingaPCEthernetconnection.WerecommendthefollowingTCP/IPsettingstoenableyourPCtocommunicatewithaCP750usingitsdefaultsetting.IPaddress:192.168.1.200Subnetmask:255.255.255.128Defaultgateway:192.168.1.129

Note: TheCP750defaultIPaddress(forconnecting)is192.168.1.136.Dolby CP750 Digital Cinema Processor Manual 19

Chapter 4

Configuring the CP750 SoftwareDolby CP750 Digital Cinema Processor Manual 21

4.1 Using the Application Tabs to Configure a CP750Eachsetupapplicationtabcontrolsadifferentpartoftheapplicationfunction.Theyarediscussedseparatelyinthefollowingsections: ProfileTab:Letsyouenteridentifyinginformationthatisimportantforservicecalls

andtechnicalsupport. Network/TimeTab:Letsyouspecifyunitaddressesandconnections GeneralSettings:Letsyoudefineapoweronmode,asubwooferfilterfrequency,and

asurrounddelayfortheCP750. InputSettings:Letsyoudefineattributesandprocessingforeachinput. Alignment:Letsyouoptimizethesoundintheauditorium.Thisimportanttopicis

describedindetailinChapter 6.

4.1.1 Profile Tab

WhenyoulaunchandconnecttheCP750setupsoftware,theapplicationopenswiththeProfiletabactive,asshowninFigure 41.

Note: Afteryouloadasavedconfigurationfile,youmustadjusttheNetworktabsettingstoreflectthecorrectauditorium.LoadingaSavedConfigurationFileisaconvenientwaytomakethesechangesquickly.

Configuring the CP750 Software Figure41

Figure 4-1 Profile Tab

Hereyouenteridentifyinginformationabouttheauditoriumequipment.Thissysteminformationisparticularlyimportantifaservicecallisevernecessary.Thekeyitemsare: CP750 Serial Number:ReadthenumberfromthebackoftheCP750unit. Theatre Name: ThismustmatchthenameregisteredinyourTheatreManagement

Software(TMS). Auditorium Number:ThismustmatchthenumberassignedtotheShowPlayer. Cinema Processor:EnteranameforyourCP750. Digital Cinema System:Identifyingnumbersforyourcinemaprocessingequipment. Digital Cinema Projector:Identifyinginformationforyourprojector. Input Descriptions:Theidentifyingtextyouenterhereisrepeatedasthetitlesofthe

Input Settingstab.

TheProfiletabdisplaysthecurrentnetworksettings,butyoucanmodifythemonlyontheNetwork/Timetab.

4.1.2 Network/Time Tab

TheNetwork/Timetab,showninFigure 42,letsyouconfiguretheCP750Ethernetsettingsandtimeanddatesettings.ThehostnameandIPaddressareechoed,readonly,ontheProfiletab.NetworkconfigurationandstatusarealsoavailablethoughtheASCIIcontrolinterface.

Tip: Assigningclearnamestothedigitalinputsisaneasywaytopreventinputselectionerrors.22 Dolby CP750 Digital Cinema Processor Manual

Using the Application Tabs to Configure a CP750Ethernet Settings

BydefaultDHCPisturnedoff,andentriesfollowtheDolbyDigitalCinemaprivatenetworkaddressnamingconventioninwhichthethirdoctetindicatestheauditoriumnumber:

Host Name:CP750xxxxx IP Address:192.168.x.136 Subnet Mask:255.255.255.128 Default Gateway:192.168.x.129IfyouareusingtheDolbyTMSyouneedonlyentertheauditoriumnumberinthethirdtriadoftheIP AddressandDefault Gatewayfields.

DHCP

WerecommendassigningtheunitastaticIPaddress,andmostinstallationsrelyonthem.However,theCP750cansupportDHCP.IfyouclickEnable,theIP Address,Subnet Mask,andDefault Gatewaychangeto0.0.0.0whiletheunitsearchesforaserverandacquiresvalidaddresses.Thissearchandacquisitionprocessmaytakeupto30seconds.Ifnoserverisfound,thedisplaysstayat0.0.0.0past30seconds.

Figure42

Figure 4-2 Network/Time Tab

Ifyoumakeanychanges,thesystemhighlightstwoactionbuttons.ClickonetoeitherDiscardChangesorApplyChanges.Dolby CP750 Digital Cinema Processor Manual 23

Configuring the CP750 Software Time and Date

YoucanchangethetimemanuallybydialingwiththearrowsintheApplyTimefield.YoucanalsoloadthelocaltimefromaserverbyclickingtheLoadLocalTimebutton.YoumustclickApplytomakechangestotheunitsstoreddateandtime.

4.1.3 General Settings

Thistab,showninFigure 43,letsyousetfoursystemattributes: PowerOnMode SurroundDelay MainOutputConfigurationandHI/VINOptions MuteDuration

Figure43

Figure 4-3 General Settings Tab

Power-On Mode

ThePoweronModeselectstheinputthatisactivatedwhentheCP750unitispoweredon.YoucanselectLastSetting,oranyoftheinputs.

Surround Delay

ThesetupapplicationcancalculateandsettheGeneralsurrounddelayvaluebasedontheatremeasurementsenteredhere.Measurementsmaybeenteredinfeetormeters.1. ClickFeetorMeterstochooseaunitofmeasure.2. EnteraDistancefromscreentorearwalloftheatrevaluebetween0and200.3. EnteranAveragedistancebetweenleftandrightSurroundchannelsvaluebetween

0and140.4. ClickCalculate.24 Dolby CP750 Digital Cinema Processor Manual

Using the Application Tabs to Configure a CP750TheGeneralvalueisadjustablefrom0to150msin1mssteps.Thedisplayshowsamarkerevery10ms.Afteryousetthegeneralsurrounddelayfordigitalmaterial,settheProLogic/ProLogicIIvaluewhichisappliedtoanalogmaterial.Theminimumvalueforthisslideris20msbecausethisvalueshouldalwaysbe20mshigherthantheGeneralvalue.

Main Output Configuration and HI/VI-N Options

Youcanchooseeitheroftwooptions: 5.1OutputConfiguration(NoBSLorBSRInstalled):Selectingthisoptioncausesthe

audioonchannels7and8ofthe4AESinputtoberoutedtotheAux OutputconnectorontherearpaneloftheCP750tosupportHI/VINintheDCP.

DolbySurround7.1/SurroundEXOutputOption(BSLandBSRInstalled):Selectingthisoptionenables7.1channelsupportintheCP750,iftheauditoriumhasbacksurroundspeakersinstalled.Whenthisoptionisselected,youcanchooseto: Disable7/8AuxOut:SelectingthisoptiondisablestheAux 7/8outputontherear

paneloftheCP750. RouteDigital2:SelectingthisoptioncausestheCP750toroutedigitalaudio

presentontheDigital 2inputtotheAux 7/8outputontherearpanel.ThisoptionalsodisablestheuseofDigital 2 inputselectorviaeitherthefrontpanelorautomation.

Mute Duration

TheFadeInandFadeOutsliderseachhavearangeof0.2to5secondsin0.1secondsteps.Seteithervaluebymovingtheslider.

4.1.4 Input Settings

TheInputSettingstabofthesetupapplicationconsistsofaseparatetabforeachinputdescribedseparatelyinthesectionsthatfollow.

4.1.5 Digital Input 1

Figure 44showstheDigitalInput1 tab.ThetabtitleisrepeatedfromtheDigital1inputdescriptionontheProfiletab.Dolby CP750 Digital Cinema Processor Manual 25

Configuring the CP750 Software Figure44

Figure 4-4 Digital Input 1 Tab

OntheDigitalInput1tabyoucanconfigure: GlobalAudioDelay MuteMainBsl/BsrOutputPins FaderPreset PCMChannelAssignment PCMDecodeMode PCMProcessingMode DolbyDigitalDecodeMode DolbyDigitalDialogueNormalization

Global Audio Delay

TheGlobalAudioDelayfieldspecifiesanaudiodelayinadditiontotheCP750decodingdelayofapproximately13 msfor4AESPCM.Usethisfunctiontosynchronizetheaudiowiththevideofromdigitalcinemaprojectors,whichaddavideoprocessingdelay.UsetheupanddownarrowstosettheGlobalAudioDelaybetween0 and 250ms.Thisdelayvalueissetindependentlyforeachdigitalinput.

Mute Main Bsl/Bsr Output Pins

ChooseEnabletomutethesepinsifyourauditoriumdoesnotusethem.

Note: Systemsthatuseanexternalvideoscalermayaddanotherdecodingdelay.26 Dolby CP750 Digital Cinema Processor Manual

Using the Application Tabs to Configure a CP750Fader Preset

TousetheFaderPresetfeature,chooseEnableandindicateavalueontheslider.Thisensuresthatinputsplayatcorrectvalueseachtimetheyareselected.

PCM Channel Assignment

Theanalogaudiooutputchannels(L,R,C,LFE,Ls,Rs)arealwaysfixedandhardwiredtoacinemaprocessor.However,whentheinputchannelmappingofaPCMbitstreamisnotadefaultSMPTEconfiguration(L/R,C/LFE,Ls/Rs),youmustreassigntheinputchannelstomatchthehardwiredaudiooutputs.Forchannelreassignment,thesurrounddelayandtheLFEfilterarealwaystiedattheoutput,andthereforecausenoproblem.Toreassigntheinputchannels,usethedropdownAssignedTomenuforeachoftheAESInputchannelsorclickoneofthethreepresetbuttons(L/RC/SwLs/Rs;L/CR/LsRs/Sw;orL/LsC/RsR/Sw).Toactivateyourchanges,clicktheApplychangesbutton.Tocancelyourchanges,clicktheDiscardchangesbutton.

PCM Decode Mode

Youcanselectoneoffoursurroundchannelprocessingoptions: None ProLogic ProLogicII SurroundEX DolbySurround7.1

PCM Processing Mode

Youhavethreechoicesofmode: MinimumLatency:Whenselected,thisdefaultmodeprovidesthequickestaudio

processing(approximately7ms)forPCMaudio. SilentSwitch:Whenselected,theCP750constantlychecksfortransitionsbetween

PCMandcodedaudio,andswitchesbetweenthetwosilently.Thismodeaddsa40mslatencytotheaudioprocessing(foratotallatencyofapproximately47ms).

Mute:Whenselected,PCMaudioismuted.DolbyDigitalplaysnormally.

Dolby Digital Decode Mode

Youchoosehowthesystemdecodesatwochannelinputstream.Therearefouroptions: Auto ProLogic ProLogicII SurroundEX

Note: BothMinimumLatencyandSilentSwitchautomaticallyswitchbetweenPCMandcodedaudio.MinimumLatencymayproduceanaudiblesnatduringthetransition.Dolby CP750 Digital Cinema Processor Manual 27

Configuring the CP750 Software Autodecodemodefollowsthesurroundmetadataparameterembeddedinthecodedbitstream.ThereisnometadatainPCMaudio.IfyouchooseProLogicorProLogicIIdecoding,yourchoiceoverridesthepresenceorabsenceofsurroundmetadataintwochannelcodedbitstreams.

Dolby Digital Dialogue Normalization

Whenenabled,thisoptionsetsthedecoderlevelshiftaccordingtothemetadataembeddedintheDolbyDigitalbitstream.ThedefaultisDisable.

4.1.6 Digital Inputs 2, 3, and 4

Theoptionsavailableonthesethreetabsareidentical.Figure 45showstheDigitalInput2tab.ThetabtitlesarerepeatedfromtheinputdescriptionsontheProfiletab.

Figure45

Figure 4-5 Digital Input 2 Tab

Fortheseinputsyoucanconfigure: GlobalAudioDelay FaderPreset PCMDecodeMode PCMProcessingMode DolbyDigitalDecodeMode DolbyDigitalDialogueNormalizationTheoptionsforGlobalAudioDelay,FaderPreset,PCMProcessingMode,DolbyDigitalDecodeMode,andDolbyDigitalDialogueNormalizationareidenticaltothoseontheDigitalInput1tab.28 Dolby CP750 Digital Cinema Processor Manual

Using the Application Tabs to Configure a CP750PCM Decode Mode

TherearethreedecodingoptionsfortwochannelPCMstreams: None ProLogic ProLogicII

4.1.7 Analog Input

Figure 46showstheAnalogInputtab.Figure46

Figure 4-6 Analog Input Tab

Onthistabyoucanset: GlobalAudioDelay MuteMainBsl/BsrOutputPins FaderPreset PCMChannelAssignment PCMDecodeModeThesechoicesoperateidenticallytothoseontheDigitalInput1tab.

4.1.8 Nonsync Input

OntheNonsyncInputtab,showninFigure 47,youcanchoose: GlobalAudioDelay FaderPresetTheoptionsoperateidenticallytothoseonothertabs.Dolby CP750 Digital Cinema Processor Manual 29

Configuring the CP750 Software YoucanchooseanyofsixsupportedformatsforPCM: Format60Nonsync Format70MonoCS Format71MonoC Format73ProLogicLCR Format74ProLogicwithnosubwoofer Format75ProLogicwithasubwooferYoucanalsosetanInputTrimusingtheslider.

Figure47

Figure 4-7 Nonsync Input Tab

4.1.9 Mic Input

OntheMicInputtab,showninFigure 48,youcanchoose: GlobalAudioDelay FaderPresetTheoptionsoperateidenticallytothoseonothertabs.ThePCMChannelAssignmentfieldallowsyoutoassignthemicrophoneinputtoeithertheCenterchannelortheSurrounds.InthePhantomPowerfield,youcanenablephantompowertothemicrophoneasneeded.30 Dolby CP750 Digital Cinema Processor Manual

Saving Settings in a Configuration FileFigure48

Figure 4-8 Mic Input Tab

4.2 Saving Settings in a Configuration FileWhenyouhavecompletedconfigurationworkontheCP750,youcansaveyoursettingstoa.dlbparameterfile.Werecommendsavingconfigurationfilesforuseintheeventyouruniteverneedstobereplaced.

ChoseSave intheFilemenuasshowninFigure 49,browsetothelocationonyourPCwhereyouwanttosavethefile,enterafilename,andclickSave.

Figure49

Figure 4-9 Selecting Save in the File Menu

Tomodifyanexisting.dlbfileandsaveitunderadifferentname,openthefile,thenselect Save AsintheFilemenu.

4.3 Loading a Saved Configuration FileACP750canberestoredfromanexisting.dlbconfigurationfile.Todoso,chooseOpenintheFilemenuofthesetupapplication,browsetothedesired.dlbfileonyourPC,andopenit.

Caution: Takecaretoidentifythesettingsfileclearly,andstoreitseparatelyfromsoftwareupdatefiles,whichalsousethe.dlbextension.Dolby CP750 Digital Cinema Processor Manual 31

Configuring the CP750 Software Figure410

Figure 4-10 Selecting Open in the File Menu

4.4 Using Expert ViewWhenyouchooseExpertViewontheWindowmenu,alltheCP750parametersandcommandstringsareavailableasshowninFigure 411.Youcanmodifyaparameterhighlightedingreenbydoubleclickingitandtypinganewvalue.Toreturntothetabdisplay,reselect ExpertView.

Figure411

Figure 4-11 Expert View Window

4.5 Updating the CP750 FirmwareToupdatetheCP750firmware:1. ObtainthelatestversionoftheCP750setupapplicationfromDolbyLaboratoriesand

installitonyourPC.2. Obtainthe.dlbupdatefilefromDolbyLaboratoriesandcopyittoyourPC.3. ConnectyourPCtotheUSBportontheCP750frontpanel.4. ClicktheSoftware Updatetabtobegintheupdateprocess.Thetabisshownin

Figure 412..32 Dolby CP750 Digital Cinema Processor Manual

Updating the CP750 FirmwareFigure412

Figure 4-12 Dolby Software Update Screen

5. ClickBrowsetofindthe.dlbupdatefileonyourPC,thenclickOpen.6. ClickUpdate.

Afterafewseconds,aprogressbardisplaysthestatusoftheupdateprocess.Whentheprocessiscompleted,theCP750automaticallyrebootswiththeupdatedfirmware.Dolby CP750 Digital Cinema Processor Manual 33

Playing Dolby Surround 7.1 Audio

PreparationofaDolbyCP750DigitalCinemaProcessorforDolbySurround7.1audiorequiresfoursteps:1. Upgradethecinemaprocessorandserversoftware,ifnecessary.2. MakeanynecessarychangestotheAESaudiocableconnectingtheserverand

processor.3. ManuallychangetheaudiooutputoftheDSP100DolbyShowPlayer(ifyour

auditoriumusesone).4. Ifnecessary,makechangestosurroundspeakerwiringtoaccommodateDolby

Surround7.1audio.ThischapterprovidesdetailsofthesetupprocessesforauditoriumsusingDolbycinemaservers.IfyourauditoriumdoesnotcontainaDolbycinemaserver,contacttheservermanufacturertoensureyouhave16channelplaybackcapabilityandtoobtainthenecessarydigitalaudiopinoutsoftheserver.SixteenchannelplaybackisrequiredbecausetheBackSurroundLeft(Bsl)andBackSurroundRight(Bsr)audiochannelsarecarriedonchannels11and12(AESpair6).

5.1 Required SoftwareTheDolbyDigitalCinemaserverrequires,ataminimum,softwarereleasev.4.2.1.TheCP750requiressoftwareversion1.2.6.5orlater.Installallrequiredsoftwareupdatesbeforeproceeding.

5.2 Cable ConnectionsEachcombinationofserverandsoundprocessorhasitsowncablingrequirements.Refertothesectionthatmatchesyourequipment.Thecombinationsare: ConnectingaDSP100toaCP750 ConnectingaDSS200toaCP750

5.3 Connecting a DSP100 to a CP750ThepinoutislistedinTable 51.

Channels18arebalanced,110digitalaudio,carriedviaa25pinDconnectorattachedtotheDSP100audiooutputconnector.Channels11and12areunbalanced,75digitalaudiooutputfromtheDSP100onBNCconnector2.Thismustbeterminatedintothechannel7/8inputontheCP750.Youcanorderthecable(DolbyPartNumber8310110)fromyourDolbydealer.

Figure51

Figure 5-1 DSP100 Rear Panel with Cable Connections

Table 5-1 DSP100 Output Connector Pinout

Pin Description Pin Description1 AEScommon 14 Channels1/2+2 Channels1/2 15 AEScommon3 Channels3/4+ 16 Channels3/44 AEScommon 17Channels5/6+5 Channels5/6 18 AEScommon6 Channels7/8+ 19 Channels7/87 AEScommon 20 AEScommon8 Notconnected 21 Notconnected9 AEScommon 22 Notconnected10 Notconnected 23 AEScommon11 Notconnected 24 Notconnected12 AEScommon 25 Notconnected13 Notconnected

5.4 Connecting a DSS200 to a CP750DolbySurround7.1requireschangestothewiringoftheDSS200outputcable.ThepinoutislistedinTable 52.

Pins10and22,carryingthechannel11/12signal(AESpair6),mustbeterminatedtoinputs7and8(AESpair4)ontheCP750.Youcanorderthiscable(DolbyPartNumber8310160)fromyourDolbydealer.

Figure52

Figure 5-2 DSS200 Rear Panel with Cable Connections

5.5 Manually Change the Audio Output of the DSP100TheDSP100mustbereconfiguredtoallowplaybackofupto16audiochannels.Onceyouhaveverifiedorinstalledthenecessaryfirmware,proceedasfollows:

Table 5-2 DSS200 Audio Output Pinout

Pin Description Pin Description1 AEScommon 14 Channels1/2+2 Channels1/2 15 AEScommon3 Channels3/4+ 16 Channels3/44 AEScommon 17 Channels5/6+5 Channels5/6 18 AEScommon6 Channels7/8+ 19 Channels7/87 AEScommon 20 AEScommon8 Channels9/10+ 21 Channels9/109 AEScommon 22 Channels11/12+10 Channels11/12 23 AEScommon11 Channels13/14+ 24 Channels13/1412 AEScommon 25 Channels15/16+13 Channels15/16

Usingthefrontpanelinterface,navigatetotherighthandlastmenu(whereyoumanuallychangethedecodefrom2Dto3D).Scrolldownuntilthelastiteminbottomofthemenu,BNC Channel Mapping,ishighlighted.Bydefault,thisissettothe18channelassignment.PressingtheEnterkeywhileBNC Channel Mappingishighlightedgivesyoutheoptionofchangingtochannels916.Usethedownarrowkeytoselect916.HighlightandpresstheEnterkeyonce.YourDSP100isnowconfiguredtopassupto16channelsofaudio.

5.6 Update Surround Speaker WiringIfyourauditoriumiswiredtosupportDolbyDigitalSurroundEXaudio,youdonotneedtomakeanyadditionalchanges.IfyourauditoriumisnotwiredtosupportDolbyDigitalSurroundEX,youmayneedtomakechangestothewiringandaddamplifiers,asdescribedintheCP650DolbyDigitalSurroundEXConnectionsinstallationnote.Thesoundpressurelevelis82dBforeach.

5.7 HI and VI-N ChannelsWiththeintroductionofDolbySurround7.1,AESpair4inputstotheCP750arerequiredforroutingtheBslandBsrchannelsintothecinemaprocessor.IftheseCP750inputsarecurrentlybeingusedforroutinghearingimpaired(HI)orvisuallyimpairednarration(VIN,alsoknownasaudiodescription)channels,anexternaldigitaltoanalog(D/A)converterwillberequiredfortheHI/VINchannels.Youmayuseaftermarketcablesoradapterstofityourinstallation.HI/VINchannelsmaybeplacedinAESpair4(channels7/8)orAESpair8(channels15/16)dependingonterritoryortheconfigurationofthedigitalcinemapackage(DCP).FortheDSP100andCP750combination,whenconfiguredforDolbySurround7.1playback,BNCconnector4ontherearoftheDSP100willbeaccessibletoretrieveAESpair8.DolbyLaboratoriesoffersa7.1cabletoconnecttheDSP100totheCP750;thecablepackagealsoincludesadongleconnectortoaccessHIandVINonAESpair4.FortheDSS200andCP750combination,whenconfiguredforDolbySurround7.1playback,allaudioconnectionsaremadeonthe25pinDconnectorport.AcustomcableorbreakoutboardcanbemadetoretrievetheAESpair8fromtheoutputoftheDSS200onpins25and13,asreferencedinTable 52.AESpair4fromtheoutputoftheDSS200isonpins6and19.DolbyLaboratoriesalsooffersa7.1cabletoconnecttheDSS200totheCP750;thecablepackageincludestwodongleconnectorstoaccessHIandVINoneitherAESpair4orAESpair8.

5.8 Using the Correct Decode ModeAtnotimeshould5.1discretecontentbeplayedinDolbySurround7.1mode,orviceversa,becauseincorrectaudiowouldbeheardintheauditoriumthroughthebacksurroundspeakers.

ThisisanimportantconsiderationforshowbuildingintheDolbyShowManager.PreshowaudioforaDolbySurround7.1featuremaybediscrete5.1channelaudio.Trailerssupplied

withaDolbySurround7.1featuremayalsohave7.1audiotracks.Theauditoriumserver,thecinemaprocessor,andtheautomationsystemmustthereforebecapableofswitchingamongsoundformatsduringtheshow.Automationortheatremanagementsystemsmayneedtobeupgraded.

5.9 Managing Decode Mode Switches with v.4.2.0 SoftwareDolbyDigitalCinemasystemversion4.2.0andlatersupportsthecuesfor5.1discrete(CP750 Decode Mode: Discrete)andDolbySurround7.1(CP750 Decode Mode: 4 Discrete Surrounds).Placethesecuesintheshowtoensurethatthedecodemodeiscorrectlyselected.

5.10 Managing Decode Mode Switches with Prior SoftwareDolbyDigitalCinemasystemsoftwarepriortov.4.2.0doesnotsupportthenewDolbySurround7.1cue.Inthiscase,configuretheCP750sothatselectingDigital Input 1automaticallyplacestheprocessorinDolbySurround7.1mode.DetailedstepsareprovidedinSection 5.13.OncetheCP750isproperlyconfigured,placeaCP750 Input: Digital 1cueatthestartoftheshow(whichwillswitchtheCP750intoDolbySurround7.1mode),followedbyaCP750 Decode Mode: DiscretecuetoswitchtheCP750to5.1discretemodeforthe5.1discretepreshowcontent.PriortoDolbySurround7.1content,placeaCP750 Input: Digital 1cue.ThisreselectsDolbySurround7.1mode.Forshowscontaining5.1discretecontentonly,alwaysplaceaCP750 Decode Mode: DiscretecueafterDigital Input 1isselectedtoensurethat5.1discretemonitoringisused.

5.11 Using Software to Configure the CP750 for Dolby Surround 7.1UsingtheCP750PCsetupsoftwareversion1.2.4.3orlater,connecttoyourCP750andselectthegeneralsettingstab.IntheMain Audio Output Configurationsection,clickBsl/Bsr (Surround EX)(showninFigure 43)toselectit.ThisconfigurationisrequiredforDolbySurround7.1andDolbyDigitalSurroundEXdecodemodes,andappliestherequiredsurrounddelaysforLs/RsandBsl/Bsr.

5.12 Calibration and Alignment SettinglevelsforDolbySurround7.1isnodifferentthancurrentpracticesforDolbyDigitalSurroundEXwithaCP750.Soundpressurelevelsshouldbesetto82dBpersurroundchannel.

5.13 Setting the Decode Mode of the CP750ThedefaultdecodingmodeforDigital Input 1canbesetonanothertabofthesoftware.ClicktheInput Settingstab,thenclickDigital Input 1toseethetabshowninFigure 44.IntheDecode Modesection,clickDolby Surround 7.1.

EnsurethattheMute Main Bsl/Bsr Output Pinsboxiscleared,notchecked.Thesechannelsarerequired.

5.14 Manually Configuring the CP750 for Dolby Surround 7.1TheDigital Input 1decodemodecanalsobesetmanuallyusingthefrontpanelinterface.PushthemenubuttononthefrontpaneloftheCP750(showncircledinFigure 53)toplacetheunitintoeditingmode.

Figure53

Figure 5-3 CP750 Front-Panel Menu Button

Onceineditingmode,youwillbepresentedwiththedecodemodechoices.Rotatingthevolumeknoballowsyoutochooseamongthreeoptions: Discrete 5.1 Surround EX Dolby Surround 7.1

Onceyouhavechosenadecodemode,pushtheconfirmbutton(showncircledinFigure 54)toapplytheselecteddecodemode.

Note: ThedecodemodesethereisappliedwheneverDigital Input 1isselected.

Figure54

Figure 5-4 Confirm Button

Afteryouconfirmthedecodemode,pushthemenubuttontocyclebacktothemaindisplay,showninFigure 55.VerifythatthedecodemodetheCP750isrunningiswhatyouchose.Again,notethatthedecodemodeyouchoseisappliedwheneverDigital Input 1isselected.

Figure55

Figure 5-5 Dolby 7.1 Decode Mode

5.15 Serial and Ethernet Table 53liststhestringparametersneededforASCIIcontroloverserialorEthernet.Table 5-3 ASCII String Commands

CP750 ASCII String Parameter Actioncp750.sys.pcm_2_channel_decode_mode_1 lr_discrete 5.1discretedecodemode

cp750.sys.pcm_2_channel_decode_mode_1 4_discrete_sur DolbySurround7.1decodemode

cp750.sys.input_mode dig_1 Selectdigitalinput1

Chapter 6

Aligning the AuditoriumDolby CP750 Digital Cinema Processor Manual 43

TheCP750allowsyoutoquicklyandeasilyoptimizethesoundqualityintheauditorium.Thealignmentprocessisdiscussedinthefollowingsections: CheckingTheatreEquipment MicrophonePlacement InitialSetup CalibratingtheInternalSPLMeter InitialOutputLevelAdjustment RoomEqualization FinalOutputLevelCalibration FinalSoundCheck NonsyncLevelAdjustment

6.1 Checking Theatre EquipmentThoroughlychecktheloudspeakersandpoweramplifiersforanysourcesofpoorperformance,usingthechecklistsbelowasaguide.

6.1.1 Speakers Checkloudspeakercableconditionandconfirmthatthecablesarethecorrectgauge

fortheimpedanceofthespeakersandthelengthoftherun. Checkthatthespeakersareconnectedtothecorrectpowerampchannel. Checkforleaksinthelowfrequencydrivercabinetwhichmaysoundlikerattles. Checkforlooseboltsorotherhardware. Checkthespeakerswithanohmmeter.Ifonechannelrequiresmarkedlymore

equalizationthantheother,orifonespeakeroverloadsatlowerlevelsthantheotherspeakers,anopendrivercircuitcouldbethecause.Insystemswithpairsofdrivers,onevoicecoilofthepairmaybeopenbutthesystemwillstillfunction.

Checkformissingdriversorothercomponents. Verifythatcrossoversettingsmatchingthetypeofdriversinuseandtheacousticsof

thetheatre.Thehighfrequencydriverlevelcontrolmustbesetforthebestpossiblefrequencyresponsebeforeyouattemptanyequalization.Thisisespeciallytrueifthesystemusesactivecrossoverswithbiampequipment.

Checkforproperpolaritybetweenthelowandhighfrequencydrivers,andbetweenthechannels.

Ensurethatthespeakersarecorrectlyaimedintotheauditorium,andthattheyarenotobstructedbythescreenframe,struts,orotherobjects.

Aligning the Auditorium 6.1.2 Amplifiers

Checkfordistortion. Checkforgrossgaindifferencesamongamplifiers.Ifoneamplifierdiffersin

performancefromtheothers,itshouldbecheckedandrepaired. Checkforblownfuses. Ensurethatthereisgoodairmovementthroughpoweramplifiers. Checkanyairfilters.

6.1.3 Air Conditioning

Ifairconditioningnoiseisaudibleinthetheatre,minimizeitby: Lubricatingthemotorandfanbearings Adjustin