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Dolby Laboratories DP570 Stereo System User Manual

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DP570 Multichannel Audio Tool User’s Manual

Using the DP570 Features Using an External Shaft Encoder to Control Master Volume

TheDP570inputrouterenablesyouto rerouteinputchannelstoconformtothe

automaticallyassignedchannelmapping.TheinputrouterisactiveevenwhenEmulator

Bypassisenabled.

TheSetupRouterwindowintheDolbyRemote570allowsyoutovieworchangerouter

settings.Toopenthewindow,clickRouter

ontheapplicationbuttonbar.

Youcanalsoresaveandrenamethefactoryinputrouterpresets.Thefactorypresets,shown

inTable 4‐4,matchexistingconventionsformultichannelmediachannelorder.Preset1

workswithatapeconformingtoSMPTEStandards320Mand320M‐A.Preset3workswith

a

tapeconformingtoSMPTESt andard320M‐B.

4.13 Using an External Shaft Encoder to Control Master Volume

ThemastervolumefunctionisavailableonDP570sthathavetheCat.No.548Analog

OptionCardinstalled.The

GPI/Oporthasthreepinsthatallowcontrolofmastervolume

remotelybyusingashaftencoder.Table 4‐5describestheinterface.

Note:Theonlyfour‐channelmodesupportedis3/1. Ifyouwishtouse2/2channelmode,

werecommendsettingtheprogramconfigurationto5.1andmutingthe

unnecessarychannels.

Table 4-4 Default Router Presets

Digital

Input

Preset 1

Output

Preset 2

Output

Preset 3

Output

Preset 4

Output

11 1 1 1

22 3 5 2

33 2 3 5

44 6 6 6

55 5 2 3

66 4 4 4

77 7 7 7

88 8 8 8

Table 4-5 Shaft Decoder Signal Descriptions

Signal Pin Description

Shaft121Shaftencoderinput.Twosquarewavesinaquadraturephaserelationship:

Shaft0leadsShaft1by90degrees:volumeincreases.

Shaft0lagsby90degrees:volumedecreases.

Shaft020

ShaftPresent 22 Groundthispintoactivatecontrolviashaftencoder.Pulledhighinternally

(10kto+5V).

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