Grimm Audio CC1 Manual de usuario
Please read this manual before operating the unit!
TPInLB
3
Table of Contents
Introduction 4
ImportantSafetyInstructions 5
1.Installing 7
2.SignalConnections 8
3.Operation 8
4.SettinguptheStudio 12
5.ProTools 16
6.JitterandPLL’sexplained 18
7.Specifications 23
8.GrimmAudioLimitedWaranty 25
4
Introduction
ThankyouforchoosingtheGrimmAudioCC1CentralClockdistributorforyour
productionenvironment.Thisproductfeaturesarichsetofdistributorfunctions,
baseduponanultralowjitterclockoscillator.Itembodiesourcompanyphilosophy
ofprovidingthemosttransparentsignalchainpossible,enablingyoutoachievethe
bestpossibleresultssonicallyandartistically.LargepartsoftheCC1circuitry,like
theoscillatoranditspowersupplies,useadiscretedesign.BecauseofthisaCC1
hasmorethan700components.Duringconstruction125seperateelementsare
tested.
TheCC1canbeusedinawidevarietyofapplicationssuchas:
•HouseSyncgenerationinaudioand/orvideostudios.Sixteenoutputspermitthe
useofthereliable“star”distributionscheme.TheextremelylowjitteroftheCC1
clockoutputsmaximisesthesoundqualitypotentialoftheattacheddevices.Incase
youneedtoslaveyoursystemtovideoclock,pleaseinsertaGrimmAudioVCC,
‘videotowordclockconverter’beforetheclockinput.
•Clockstabilityimprovement,andhenceimprovedsound,ofdigitallivedesksand
digitalsnakes.
•Clockdistributioninbroadcaststudios.
•Improvementofyourhomeaudiosystem.Forinstanceinconjunctionwithword
clockequipeddevicesorasreclockunitinbetweenatransportormediasystem
andaDAconverter.
Thismanualdescribeshowtosetuptheunitinyourstudio,liveorhomeenviron-
mentaswellasimportanttipsonhowtogetthebestperformancefromtheCC1.In
addition,somebackgroundinformationontheunit’soperationisprovided.
Wehopethisinvestmentwillbringyoumanyyearsofcreativeenjoymentandhelp
youachieveyourgoals.
5
Important Safety Instructions
Grimm Audio gaat er van uit dat u deze Engelstalige tekst volledig begrijpt. Als u hier moeite
mee heeft dient u contact op te nemen met Grimm Audio. Op verzoek sturen wij u een vertaling
toe.
Grimm Audio nimmt an, dass Sie diesen Englischen Text völlig verstehen. Wenn notwendig,
nehmen Sie bitte Kontakt auf mit Grimm Audio. Auf Wünsch wird Ihnen eine Übersetzung zu-
geschickt.
Grimm Audio suppose que le lecteur comprend parfaitement le texte en Anglais ci-dessous. En
cas de doute s.v.p. contacter Grimm Audio. Si necessaire, on pourra vous envoyer une traduc-
tion.
Grimm Audio da por supuesto que el texto en versión Inglesa no ofrece ninguna duda de in-
terpretación y se entiende integramente. Si este no fuese su caso rogamos contacte con Grimm
Audio quien, a petición, se encargaría de enviarle la correspondiente traducción.
Please follow these precautions when using this product:
1.Readtheseinstructions.
2.Keeptheseinstructions.
3.Heedallwarnings.
4.Followallinstructions.
5.Dangerousvoltageisinsidethisapparatus.Openingisonlyallowedbyqualified
servicepersonnel.
6.Verifylinevoltagebeforeuse.
7.Donotdefeatthesafetypurposeofthepolarizedorgrounding-typeplug.A
polarizedplughastwobladeswithonewiderthantheother.Agrounding-typeplug
hastwobladesandathirdgroundingprong.Thewidebladeorthethirdprongare
providedforyoursafety.Whentheprovidedplugdoesnotfitintoyouroutlet,con-
sultanelectricianforreplacementoftheobsoleteoutlet.
8.Protectthepowercordfrombeingwalkedonorpinched,particularlyatplugs,
conveniencereceptables,andthepointwheretheyexitfromtheapparatus.
9.Unplugthisapparatusduringlightningstormsorwhenunusedforlongperiods
oftime.
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10.Donotusethisapparatusnearwater.
11.Donotusethisapparatusoutside.
12.Donotexposetheapparatustodrippingorsplashing.Donotplaceobjects
filledwithliquids(flowervases,drinkcans,coffeecups,etc)ontheapparatus.
13.Cleanonlywithadry,soft,non-fluffycloth.Donotsprayanyliquidcleaneronto
thecabinet,asthismayleadtodangerousshocks.Donotsprayanyliquidcleaner
ontothefaceplate,asthismaydamagethefrontpanel.
14.Installinaccordancewiththemanufacturer’sinstructions.
15.Donotinstallnearanyheatsourcessuchasradiators,heatregisters,stoves,or
otherapparatus(includingamplifiers)thatproduceheat.Avoidexposuretodirect
sunlight.
16.Useonlyattachmentsoraccessoriesspecifiedbythemanufacturer.
17.Useonlywithacart,stand,bracket,ortabledesignedforusewithprofessional
audioormusicequipment.Inanyinstallation,makesurethatinjuryordamagewill
notresultfromcablespullingontheapparatusanditsmounting.Ifacartisused,
useprecautionwhenmovingthecart/apparatuscombinationtoavoidinjuryfrom
tip-over.
18.Thisunitrunsslightlywarmwhenoperatednormally.Operateinanormalventi-
latedarea.Ifthisproductwillbeinstalledinarack,makecertainthereissufficient
airmovementwithintherack.
19.Referallservicingtoqualifiedservicepersonnel.Servicingisrequiredwhenthe
apparatushasbeendamagedinanyway,suchaswhenthepower-supplycordor
plugisdamaged,liquidhasbeenspilledorobjectshavefallenintotheapparatus,
theapparatushasbeenexposedtorainormoisture,doesnotoperatenormally,or
hasbeendropped.
20.WARNING: Toreducetheriskoffireorelectricshock,donotexposethisappa-
ratustorainormoisture.
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1. Installing
Unpacking and Inspection
YourCC1wascarefullypackedatthefactoryandthecartonitcameinwasde-
signedtoprotectitfromthetrialsandtribulationsofshipping.Keeptheboxandall
packingmaterials,sothatintheunlikelyeventthatyouneedtoreturntheCC1for
servicing,youcandososafely.
Mounting the CC1
TheCC1canmountinanystandard19”rack.TheCC1doesnotproduceRFfields
norissusceptibletothem.Youcanpositionitnearotherdigitalgearsuchascom-
puteranddiskrecorderswithoutworry.Ingeneralitisagoodideatokeepsome
distancebetweenmonitors(LCDandCRT)andaudioandwordclockcablesbecause
ofriskofinducedlowlevelnoiseduetostraymagneticfields.
GrimmAudioproductshavearealwoodfaceplatethatprovidesabeautifuland
vividappearance.Tomaintaintheoutstandinglooks,oneisadvisedtotakesome
precautions:
-DonotplacetheCC1inhumidnorverydryenvironments.Thewoodmightcrack.
-Donotusechemicaloralcoholbasedcleaneronthewood.
AC Power Hookup
TheCC1hasalinearpowersupplythatneedstobefactorysetforyourlocalline
voltage.MakesuretocheckthenotedlinevoltageonthebackbelowtheIECcable
entrance(‘wiredfor...V’)andverifythatthiscomplieswithyourlocallysupplied
linevoltage.GrimmAudiocannotberesponsibleforproblemscausedbyusing
theCC1withimproperACwiringorvoltage.SincetheCC1doesnothaveapower
switchonthefrontpanel,aconvenientwaytopowerdowntheunitistousea
powerstripequippedwithaswitch.
8
2. Signal Connections
TogglesMaster44.1/48kHzandSlave
Togglesgroup1sampleratemultiplicationfactor
Togglesgroup2sampleratemultiplicationfactor
AES3-out
(follows
AES3-in when
available
and selected,
otherwise
group 2)
AES-in
lockstatus
Inputs
(AES3-in also
for reclocking
purpose)
AES-out
behavior
(thru or
mute) Impedance
group1
(75 Ohm
or Lo-Z)
Impedance
group2
(75 Ohm
or Lo-Z)
Phaseof
BNC11,
12,13,14
(normal or
180°)
Outputs
group1
Outputs
group2 Indication
offactory
setline
voltage
value
unlock
behavior
(hold or
mute)
3. Operation
Master mode
Theleftmostfrontpanelpushbuttonselectsbetweentwobaseclockrates:44.1kHz
or48kHz.Thetwootherpushbuttonsdeterminetheactualclockfrequencytrans-
mittedacrossthe16BNCoutputs.Theycontrolintwogroups.Group1arechan-
nels1-12.Thesecondpushbuttonsetsthemultiplicationfactorforthisgroupto
1x,2xor4x.Group2arechannels13-16,andtheirmultiplicationfactorissetby
thethirdpushbutton.Setting“48kHz”usingtheleftmostpushbutton,“1x”onthe
middleselectorand“2x”ontherightmostselectorwillsettheclockrateongroup1
BNC’sto48kHzandongroup2BNC’sto96kHz.
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TheAES3outputhastwofunctions,dependingonthesettingofthedipswitch
marked“aes”ontherear.Itdetermineswhethertheaudiocontentfoundatthe
AES3inputispassedthroughtotheoutput(“thru”)ornot(“mute”).In“mute”mode
theAES3datawillbeblackandrunattherateselectedforgroup2.In“thru”mode,
theAES3outputwillobviouslyrunatthesamerateastheAES3input.Onlossof
inputsignal,theoutputwillremainatthesamesamplingrate.
TheexactbehaviouroftheAES3outputinmastermodedependsontheusecase:
1.NosignalconnectedtotheAES3input.TheAES3outputisablacksignal(no
audio)withthesamesamplingrateastheGroup2BNCoutputs.Thechannelstatus
bitsindicate“Grade1reference”iftheCC1hasgonethroughtheoptionalfrequen-
cycalibration,otherwise“Grade2reference”.TheAESlockindicatorontherearis
off.
2.AsignalisappliedtotheAES3inputthatisnotsynchronoustotheCC1.The
AES3outputisablacksignalwiththesamesamplingrateastheGroup2BNCout-
puts.TheAESlockindicatorontherearblinks.
3.AsignalisappliedtotheAES3inputthatissynchronoustotheCC1,butthe“aes”
dipswitchissetto“mute”.TheAES3outputwillstillbeblackandsynchronous.The
presenceoftheaessignalhasnoeffect.In“master”modewiththe“aes”dipswitch
setto“mute”,anysignalattheAES3inputisbasicallyignored,exceptthatthe“aes
lock”lightontherearwillbeontoindicatethepresenceofasynchronousinput.
4.AsignalisappliedtotheAES3inputthatissynchronoustotheCC1,andthe
“aes”dipswitchissetto“thru”.TheAES3outputfullycopiesaudioandsubcode
data(butnotthejitter!)fromtheAES3input.InthismodetheAES3outputwill
neverindicate“grade1”asAES11requiresablacksignal.The“aeslock”lightison.
5.Iftheinputsignalislostfromcase4,thesamplingfrequencysettingisretained,
assuddenlossofsignalismostlikelyaccidental.Thisisdifferentfromcase1
whereanAES3inputsignalwasneverpresent.IftheremovaloftheAES3inputwas
onpurpose,changingthegroup2multipleonthefrontwillreturntocase1,and
theAES3outputwillonceagainbesynchronoustotheselectedmultipleofgroup2.
Slave mode
Slavemodeisthethirdsettingontheleftmostselector.Inslavemode,theCC1will
lookatthewordsyncinputaswellastheAES3inputforavalidsignal.Slavemode
permitsthefollowingusecases:
1.Wordsynconly.Uponselectionofslavemode,theCC1selectsthewordsync
input.Themiddleandrightselectoronceagainsetgroups1and2toamultipleof
thebaserate.TheAES3outputwillbeblack,synchronisedtogroup2andthechan-
10
nelstatusmarked“noreference”.Uponlossoflock,theoutputfrequencywillbe
heldconstant,seecase4.
2.AES3only.Uponselectionofslavemode,theCC1selectstheAES3input.The
“aes”dipswitchattherearselectswhethertheaudiodataistransmitted(thru)or
not(mute).Inthrumode,theAES3outputwillobviouslyrunatthesamemultipleas
theAES3input.Inmutemodeitwillbesynchronoustogroup2,audioisblackand
marked“noreference”.Uponlossoflocktheoutputratewillbeheldconstant,see
case4.The“AESlock”lightontherearwillbeonaslongastheCC1PLLislocked.
3.BothAES3andwordsyncarepresent.Wordsyncwilltakeprecedenceoverthe
AES3input.In“thru”modetheAES3outputwillproduceajitter-freecopyofthe
AES3input,providedtheinputsignalissynchronous.In“mute”modetheAES3
inputwillbeignoredaltogether.UponlossoftheAES3inputtheAES3outputwill
reverttoblack.Uponlossofthewordsyncinputtheoutputfrequencywillbeheld
constant(within1ppmofthelastdetectedfrequency)andthefrontslavelightwill
blinktoindicateanerror.Thefaultconditionisclearedeitherbyreattachingthe
wordsyncorbycyclingthesourceselectorthroughthetwomastermodesbackto
slavemodetoforcetheCC1tolocktotheAES3signalinstead.TheCC1willnever
automaticallyswitchfromwordsynctoAES3topreventclockloops.
4.NovalidsignaloneitherwordsyncorAES3input.Theresponseisnowdeter-
minedbythedipswitchnamed“unlock”.Whensetto“thru”,theclockfrequencywill
beheldconstantwithin1ppmofthelastvalidmeasuredfrequency.Whensetto
“mute”,theoutputswillbemuted.Inbothcasestheslavelightwillblinktoindicate
anerror.The“mute”modeisadvantageousatforinstancepostproductionwhere
theclockusuallyisoutofsightinamachineroom.Uponlossoflock,allclocksdis-
appearandyoursoftwareautomaticallyprovidesawarning.The“thru”modehasan
advantageinforinstanceliverecordingorPublicAddress.Heresoundshouldnever
mute,whateverhappens.
Lock indication
TheCC1detectswhethertheinputsignalisamultipleof44.1kHzor48kHz,and
indicatesthisontheLEDsabovethesourcepushbutton.Thefrequencymultiple
settingsofgroups1and2remainassetbytheuser.WhiletheCC1acquireslock,
theslavelightwillblink.Thiscantakeupto20s,onaccountoftheCC1’sextremely
slowPLLdesign(seechapter6,“JitterandPLL’sexplained”).Oncefrequencylock
isachieved,theslaveLEDwillcomeoncontinuously.ThePLLwillthensettleto0º
phaselockwiththeinputinanevenslowermode.Thesmallestachievablephase
errordependsmostlyonthestabilityoftheincomingclock.Thestatic(average)
phaseerrorisfactory-alignedtowithin50ns.
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