20 Dolby® DP570 Multichannel Audio Tool User’s Manual
Controlling the DP570 Using the GPI/O Connector

3.5.6 Analog Output Master Volume

PressShift,Entertoaccessthemastervolumecontrolfortheoptionalanalogoutputs.
Usethearrowbuttonstoadjustthevolume.PressEntertokeepthecurrentvalueand
returntothepreviousmenu,orpressEsctorestoretheinitialvalue.Anyadjustmentyou
maketakeseffectimmediately.
3.6 Using the GPI/O Connector
YoucanusethisporttoconnecttheDP570toyourstudioconsoleorexistingcontrol
equipment.Astandaloneremotecontrolunit,theCat.No.549GPI/OController,isalso
availabletoprovideeasyaccesstothefeaturesoftheGPI/Oport.Byassigningspecific
functionstotheuserdefinablepins,youcancontrolandobtainstatusfromtheDP570.
ManyfunctionsalsoallowyoutoadapttheDP570toyourexistingenvironmentby
definingthetypeandpolarityoftheinputoroutputlogic.

3.6.1 Selecting GPI/O Functions

Table 3 6providesadescriptionforeachfunctionthatcanbeassignedtoGPOpins.Some
functionshaverestrictionsonthepolarityortriggertype.TheActiveStatecolumn
indicatestheDP570statethatcausesleveltriggeredpinstobeforcedtothelogiclevel
indicatedinthePolaritycolumnofthetable.Forexample,whentheDP570entersEmulator
BypassmodetheGPOpingoeshigh.WhentheunitisnolongerinBypassmode,thepin
goeslow.
Table 3-6 GPO Functions Available
Function Polarity Trigger Active State Description
VRef Either Either VReferror Nosignalorinvalidsignal.(Checkfor
propertermination.)
Metadatain1 Either Either Metadataerror InvalidsignalwhileunitisinExternal
Metadatamode.
Metadatain2 Either Either Metadataerror InvalidsignalwhileunitisinExternal
Metadatamode.
EmulatorbypassEither Either Bypass IndicatesBypassisactive.
DelayLEDEither Either On Notyetimplemented.
Lt/Rtinput Either Either Enabled IndicatesLt/Rtinputisactive.
Dim/muteaEither Either Enabled IndicatesDimGainsettingisactive.
SurroundEX™Either Either EXon IndicatesSurroundEXisactive.
ProLogic®Either Either ProLogicon IndicatesProLogicisactive.
LspeakermuteaEither Either Mute IndicatesMuteisactive.
RspeakermuteaEither Either Mute IndicatesMuteisactive.
CspeakermuteaEither Either Mute IndicatesMuteisactive.
SWspeakermuteaEither Either Mute IndicatesMuteisactive.
LsspeakermuteaEither Either Mute IndicatesMuteisactive.
RsspeakermuteaEither Either Mute IndicatesMuteisactive.