System User Guide / Owners Manual

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sync,butfortunatelyitisgoingoutoffashion.LTCisprobablytheleaststabletime
referencearound.
Enterdigitalaudio.Theaudiotracknowneedstobesynchronisedtothepicture.
Wordsynchasabettertimeresolutionthanvideosync,butstillthemostcommon
practiceislockingtheaudioclocktothevideoclock.Evenmoderndigitalvideopro-
ductionpracticetendstolockaudiotoananaloguevideosignal.Thisisunfortunate
becauselowjitterisnotexactlyadesignspecforavideosyncgenerator.
TheCC1cannotslavetovideosyncdirectly.Inordertoavoiddirectcrosstalkbe-
tweentheblack-burstgeneratororreceiverandtheaudioclock,wehaveomitted
videosyncfunctionality.OurbestadviseistousetheCC1astheaudiomaster
andslaveallvideototheaudiowordsync.Ifyouneverthelessdoneedtoslavethe
audiosystemtovideosyncyoucaneitherbuyourVCC‘VideotoWordClock’con-
verteroruseanyothergenericvideotowordclockconverter.Connecttheretreived
wordclocktotheCC1’swordclockinputandhavetheCC1cleanupthesyncand
distributeclocktotheaudiodevicesasusual.Theextraordinarystabilityofthe
CC1’sPLLwillmakesuretheresultcomesascloseaspossibletomakingtheaudio
chainmaster.
Hints
•Selectdecentquality75Ohmcoaxcablesandcertainlydonotskimponthequal-
ityoftheconnectors.
•Makecablesnolongerthannecessary.
•Cablesaddpropagationdelay.Itisexceedinglyrarefordifferencesinclockphase
toaffecttheinteroperabilityofconnectedaudioequipment,butifithappens,using
equallengthcablesthroughouthelps.
•Disconnectunusedgear.
•IdeallydonotleavethewordclockinputconnectedwhentheCC1ismaster.
Althoughunlikely(theCC1hasarelaytoactivelydisconnecttheinputwhennotin
use),thereisapossibilityofcross-talkfromtheinputclocktotheoutputs.Like-
wise,donotleaveanAES3cableattachedifnotneeded.