- Dolby Multichannel Audio Tool User's Manual

6 Dolby
®
DP570 Multichannel Audio Tool User’s Manual
Getting Started
2.3.1 Venting
Dolby
®
professionalaudioproductsaredesignedtooperatewithinatemperatur e rangeof
5°Cto45°C.Theyusenaturalconvectioncoolingandthereforeshouldnotbemounted
directlyaboveanyheat‐generatingequipment.TheDP570hasventholesinthefrontand
backoftheunit,andcanbeplaceddirectly
aboveorbelowotherrack‐mountedgear.
2.3.2 Making Input Connections
ConnectthemandatorymultichannelPCMsignalstothedigitaljacks.Usecaretoattach
theinputcablestotheproperconnectortoavoidinadvertentlymovingchannels.
ForadiscussionoftheconnectortypesusedontheDP570,seeAppendix B.
YoumayalsoconnectaDolbySurroundencodedstereoPCMmixto
eitherofthe Lt/Rt
Inputs
jacks.Usethesecondjackeithertopassthesignaltoanotherdeviceortoterminate
theconnectionwitha75ohmimpedance.
2.3.3 Making Output Connections
Therearetwosetsofdigitalaudiooutputsontherearpanel.Oneistheoutputfromthe
routerandtheotherisfromtheemulator.
ForadiscussionoftheconnectortypesusedontheDP570,seeAppendix B.
Router Output
UsetheRouter Outputsforthemaindigitalsignaloutputregardlessofwhetheryouare
reassigningsignalstodifferentchannels.Forinformationonhowtoreassigninputsignals
todifferentchannels,seeSection 4.12.
Emulator Output
TheseoutputsareaffectedbymetadatachangesyoumakeintheDP570andshouldonly
beusedtosendasignaltothemonitoringsystem.ConnectthemtoyourownD/A
converterifyouaremonitoringwithoutusingtheCat.No.548AnalogOutputCard.
2.3.4 Making the V Ref Connection
ConnecttheVRefsignaltoeitherofthetwojacksontherearpanel.Usethesecondjack
eithertopassthesignaltothenextdeviceinthechain,ortoterminateitwitha75ohm
impedanceonthelastdeviceinthesignalchain.
Ifthereis
novideoinputorthevideoinputfails,theDP570generatesadefaultframebased
on1,536samplesatthecurrentaudioclockrate,tomatchDolbyDigitalframerates.
Note: TheDP570willnotoperatewithoutavalidsampleclocksignalpresentatthe
channel1/2inputconnection.