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Dolby CP750 Digital Cinema Processor Manual
Issue 5 Part Number 9110270
Dolby Laboratories, Inc.
Corporate HeadquartersDolbyLaboratories,Inc.100PotreroAvenueSanFrancisco,CA 941034813 USATelephone4155580200
Fax4158631373www.dolby.com
European HeadquartersDolbyLaboratories,Inc.WoottonBassettWiltshire SN48QJ EnglandTelephone441793842100Fax441793842101
DISCLAIMEROFWARRANTIES:EQUIPMENTMANUFACTUREDBYDOLBYLABORATORIESISWARRANTEDAGAINSTDEFECTSINMATERIALSANDWORKMANSHIPFORAPERIODOFONEYEARFROMTHEDATEOFPURCHASE.THEREARENOOTHEREXPRESSORIMPLIEDWARRANTIESANDNOWARRANTYOFMERCHANTABILITYORFITNESSFORAPARTICULARPURPOSE,OROFNONINFRINGEMENTOFTHIRDPARTYRIGHTS(INCLUDING,BUTNOTLIMITEDTO,COPYRIGHTANDPATENTRIGHTS).
LIMITATIONOFLIABILITY:ITISUNDERSTOODANDAGREEDTHATDOLBYLABORATORIESLIABILITY,WHETHERINCONTRACT,INTORT,UNDERANYWARRANTY,INNEGLIGENCE,OROTHERWISE,SHALLNOTEXCEEDTHECOSTOFREPAIRORREPLACEMENTOFTHEDEFECTIVECOMPONENTSORACCUSEDINFRINGINGDEVICES,ANDUNDERNOCIRCUMSTANCESSHALLDOLBYLABORATORIESBELIABLEFORINCIDENTAL,SPECIAL,DIRECT,INDIRECT,ORCONSEQUENTIALDAMAGES(INCLUDING,BUTNOTLIMITEDTO,DAMAGETOSOFTWAREORRECORDEDAUDIOORVISUALMATERIAL),COSTOFDEFENSE,ORLOSSOFUSE,REVENUE,ORPROFIT,EVENIFDOLBYLABORATORIESORITSAGENTSHAVEBEENADVISED,ORALLYORINWRITING,OFTHEPOSSIBILITYOFSUCHDAMAGES.
.
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