Ensemble Designs BrightEye 33 User manual

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

Analog Audio

Distribution Amplier

Revision 1.0

This user guide provides detailed information for using the BrightEye 33 Analog Audio Distribution

Ampliﬁer.

The information is organized into the following sections:

 •ProductOverview

 •RearConnectors

 •Operation

 •FrontPanelControlsandIndicators

 •WarrantyandFactoryService

 •Specications

 •Glossary

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

Contents

PRODUCT OVERVIEW 3

REAR CONNECTORS 4

Power Connection 4

Analog Audio Input 4

Analog Audio Outputs 4

For Unbalanced Audio to a RCA Phono Input 5

OPERATION 5

Front Panel Controls 5

Gain 5

Front Panel Indicators 5

Pwr (Power) 5

WARRANTY AND FACTORY SERVICE 6

Warranty 6

Factory Service 6

SPECIFICATIONS 7

BRIGHTEYE POWER SUPPLY INFORMATION 8

GLOSSARY 9

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

PRODUCT OVERVIEW

BrightEye 33 is a high performance audio distribution ampliﬁer for the broadcast and recording

industry. Exceptional performance features include excellent response, noise and distortion

speciﬁcations. BrightEye 33 functions with either 8 mono outputs or 4 stereo outputs.

Gainadjustmentsareaccessedfromthefrontpanel.ThisisasimpledevicewithnoUSBportandno

interfacetoBrightEyeMacorPCsoftware.

A glossary of commonly used video terms is provided at the end of this guide.

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

REAR CONNECTORS

AllconnectionstotheBrightEye33aremadeontherearoftheunit.Refertotheillustrationbelow.

BrightEye 33 Rear Connectors

Power Connection

Connectamodularpowersupplytothe12voltDCpowerinputconnectiononthefarleftoftheunit.

Usethelockingringtosecureit.

Analog Audio Input

This 6-pin Phoenix connector provides two channels of analog audio input. This connector is ﬁtted

withapluggableterminalblockthatacceptsbarewireleads.Wirescanbeinsertedintothesmall

roundholes.Striptheaudiowiretoabout3/8”(8mm).Soldertinningisnotrequired.Toremovethe

wire, push in the pin above the connection with a small pointed tool. This will release the wire from the

connector.

FollowthelegendtoconnecttheGround(G),Positive(+),andNegative(-)connectionsforeachsignal.

Ch1correspondstotheleftchannelinastereosystem,andCh2correspondstotherightchannel.

Analog Audio Outputs

ThefourAnalogAudioOutputsprovide8MonoOutputsor4StereoOutputsofAnalogAudio.

EachAudioOutconnectorprovidestwochannelsofbalancedanalogaudio(1pair).Theseconnectors

areeachttedwithapluggableterminalblockthatacceptsbarewireleads.Wirescanbeinsertedinto

thesmallroundholes.Striptheaudiowiretoabout3/8”(8mm).Soldertinningisnotrequired.To

remove the wire, push in the pin above the connection with a small pointed tool. This will release the

wire from the connector.

FollowthelegendtoconnecttheGround(G),Positive(+),andNegative(-)connectionsforeachsignal.

Ch1correspondstotheleftchannelinastereosystem,andCh2correspondstotherightchannel.

Ifconnectingtoanunbalanced(single-ended)destination,suchasaconsumerspeakeramplier,with

shieldedcoaxialstyleaudiocable,connectthecenterconductortothePositive(+)terminal.Then

connecttheouterconductortoboththeGround(G)andNegative(-)terminals.

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

OPERATION

Monitoring of the BrightEye 33 is performed from the front panel as illustrated in the ﬁgure below.

ThisisasimpledevicewithnointerfacetotheBrightEyeControlapplication.Therearenoadjustments

requiredforthisunit.

BrightEye 33 Front Panel

Front Panel Controls

Gain

ThegaincanbeadjustedfromthefrontpanelforChannel1orChannel2.Toadjustgain,insertasmall

toolintotherecessedpotentiometerandrotateclockwisetoincreasegainorcounterclockwiseto

decrease gain.

Front Panel Indicators

The front panel of the BrightEye 33, shown in the ﬁgure above, provides the following status indicator.

Pwr (Power)

Illuminatesgreenwhenpowerisappliedtotheunitandtheinternalvoltageregulatorisfunctioning

correctly.

For Unbalanced Audio to a RCA Phono Input

ToconnecttheaudiooutputtoaconsumeraudioconnectorsuchasanRCAphonojack,connectthe

pins as follows:

• AttachGroundfromPin1oftheAudioOuttotheshell,ShieldorGroundoftheRCAPhono

jack.

• Attachthe+(plus)signalfromPin2oftheAudioOuttothecenterpinoftheRCAPhonojack.

• The–(minus)signalisnotusedinthisapplication.

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

WARRANTY AND FACTORY SERVICE

Warranty

Thisproductiscoveredbyaveyearlimitedwarranty.Ifyourequireservice(underwarrantyornot),

pleasecontactEnsembleDesignsandaskforcustomerservicebeforeyoureturnthisproduct.This

will allow the service technician to provide any other suggestions for identifying the problem and

recommend possible solutions.

Factory Service

Ifyoureturnequipmentforrepair,pleasegetaReturnMaterialAuthorizationNumber(RMA)fromthe

factory ﬁrst.

Shiptheproductandawrittendescriptionoftheproblemto:

EnsembleDesigns,Inc.

Attention:CustomerServiceRMA#####

870GoldFlatRd.

NevadaCity,CA.95959USA

(530)478-1830

Fax:(530)478-1832

ser[email protected]om

http://www.ensembledesigns.com

BesuretoputyourRMAnumberontheoutsideofthebox.

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

SPECIFICATIONS

Analog Audio Inputs

Number   Two

Type Balanced

Impedance   >15KΩ

MaximumInputLevel 24dBu

CMRR    >60dB,20Hzto10KHz

Analog Audio Outputs

Number   Fourstereooreightmono

Type Balanced, transformerless

Impedance   30Ω

MaximumOutputLevel 24dBu

Performance

GainRange   ±6dB

FrequencyResponse  <±0.1dB,20Hzto20KHz

Isolation   >100dB

S/NRatio   >100dB,unweighted

General Speciﬁcations

Size    5.625”Wx0.8”Hx5.5”D(143mmx20mmx140mm)

including connectors

Power 12 volts, 4 watts

    (100-230VACmodularpowersupplynotincluded)

TemperatureRange  0to40°Cambient

RelativeHumidity  0to95°noncondensing

Altitude 0 to 10,000 feet

Duetoongoingproductdevelopment,allspecicationsaresubjecttochange.

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

BRIGHTEYE POWER SUPPLY INFORMATION

Below is a list of power supplies and optional items that may have come with your BrightEye:

BEPS  BrightEyeIndividualPowerSupply.

BEPS6  SpiderPowerSupply.Thispowers6singlehighBrightEyesor3doublehighBrightEyes.

BEPS6-RP RedundantPowerSupplyforSpider.

BERKMT BrightEyeRackMount.Thisholds6singlehighBrightEyesor3doublehighBrightEyes,

or a combination.

BEBP  BrightEyeBlankPanel.Singlehigh,foremptyslotsinRackMount.

BEAC  AnalogAudioBreakoutCable.

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

GLOSSARY

This is a brief glossary of commonly used terms associated with this product.

AES/EBU

ThedigitalaudiostandarddenedasajointeortoftheAudioEngineeringSocietyandtheEuropean

BroadcastUnion.AES/EBUorAES3describesaserialbitstreamthatcarriestwoaudiochannels,

thusanAESstreamisastereopair.TheAES/EBUstandardcoversawiderangeofsampleratesand

quantizations(bitdepths.)Intelevisionsystems,thesewillgenerallybe48kHzandeither20or24bits.

Bandwidth

Strictlyspeaking,thisreferstotherangeoffrequencies(i.e.thewidthofthebandoffrequency)used

byasignal,orcarriedbyatransmissionchannel.Generally,widerbandwidthwillcarryandreproduce

a signal with greater ﬁdelity and accuracy.

Beta

SonyBetaSPvideotapemachinesuseananalogcomponentformatthatissimilartoSMPTE,but

diersintheamplitudeofthecolordierencesignals.Itmayalsocarrysetupontheluminance

channel.

Blanking

TheHorizontalandVerticalblankingintervalsofatelevisionsignalrefertothetimeperiodsbetween

linesandbetweenelds.Nopictureinformationistransmittedduringthesetimes,whicharerequired

inCRTdisplaystoallowtheelectronbeamtoberepositionedforthestartofthenextlineoreld.

They are also used to carry synchronizing pulses which are used in transmission and recovery of the

image. Although some of these needs are disappearing, the intervals themselves are retained for

compatibility purposes. They have turned out to be very useful for the transmission of additional

content, such as teletext and embedded audio.

CAV

ComponentAnalogVideo.Thisisaconvenientshorthandform,butitissubjecttoconfusion.Itis

sometimesusedtomeanONLYcolordierencecomponentformats(SMPTEorBeta),andothertimes

toincludeRGBformat.Inanycase,aCAVsignalwillalwaysrequire3connectors–eitherY/R-Y/B-Y,or

R/G/B.

Checkﬁeld

ACheckeldsignalisaspecialtestsignalthatstressesparticularaspectsofserialdigitaltransmission.

TheperformanceofthePhaseLocked-Loops(PLLs)inanSDIreceivermustbeabletotoleratelong

runsof0’sand1’s.Undernormalconditions,onlyveryshortrunsoftheseareproducedduetoa

scramblingalgorithmthatisused.TheCheckeld,alsoreferredtoasthePathologicaltestsignal,will

“undo”thescramblingandcauseextremelylongrunstooccur.Thistestsignalisveryusefulfortesting

transmission paths.

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Analog Audio Distribution Ampliﬁer User Guide

BrightEye 33

Chroma

Thecolororchromacontentofasignal,consistingofthehueandsaturationoftheimage.Seealso

ColorDierence.

Component

Inacomponentvideosystem,thetotalityoftheimageiscarriedbythreeseparatebutrelated

components.Thismethodprovidesthebestimagedelitywiththefewestartifacts,butitrequires

threeindependenttransmissionpaths(cables).Thecommonlyusedcomponentformatsare

LuminanceandColorDierence(Y/Pr/Pb),andRGB.Itwasfartoounwieldyintheearlydaysofcolor

television to even consider component transmission.

Composite

Compositetelevisiondatesbacktotheearlydaysofcolortransmission.Thisschemeencodesthe

colordierenceinformationontoacolorsubcarrier.Theinstantaneousphaseofthesubcarrieristhe

color’s hue, and the amplitude is the color’s saturation or intensity. This subcarrier is then added onto

theexistingluminancevideosignal.Thistrickworksbecausethesubcarrierissetatahighenough

frequencytoleavespectrumfortheluminanceinformation.Butitisnotaseamlessmattertopull

the signal apart again at the destination in order to display it or process it. The resultant artifacts of

dotcrawl(alsoreferredtoaschromacrawl)areonlythemostobviousresult.Compositetelevisionis

themostcommonlyusedformatthroughouttheworld,eitherasPALorNTSC.Itisalsoreferredtoas

Encoded video.

Color Diﬀerence

ColorDierencesystemstakeadvantageofthedetailsofhumanvision.Wehavemoreacuityinour

blackandwhitevisionthanwedoincolor.Thismeansthatweneedonlytheluminanceinformationto

becarriedatfullbandwidth,wecanscrimponthecolorchannels.Inordertodothis,RGBinformation

isconvertedtocarryalloftheluminance(Yistheblackandwhiteofthescene)inasinglechannel.

Theothertwochannelsareusedtocarrythe“colordierence”.NotedasB-YandR-Y,thesetwosignals

describehowaparticularpixel“diers”frombeingpurelyblackandwhite.Thesechannelstypically

have only half the bandwidth of the luminance.

Decibel (dB)

The decibel is a unit of measure used to express the ratio in the amplitude or power of two signals. A

dierenceof20dBcorrespondstoa10:1ratiobetweentwosignals,6dBisapproximatelya2:1ration.

Decibels add while the ratios multiply, so 26 dB is a 20:1 ratio, and 14 dB is a 5:1 ratio. There are several

special cases of the dB scale, where the reference is implied. Thus, dBm refers to power relative to 1

milliwatt,anddBureferstovoltagerelativeto.775VRMS.TheoriginalunitofmeasurewastheBel(10

timesbigger),namedafterAlexanderGrahamBell.

dBFS

InDigitalAudiosystems,thelargestnumericalvaluethatcanberepresentedisreferredtoasFull

Scale.NovaluesoraudiolevelsgreaterthanFScanbereproducedbecausetheywouldbeclipped.

Thenominaloperatingpoint(roughlycorrespondingto0VU)mustbesetbelowFSinordertohave

headroomforaudiopeaks.ThisoperatingpointisdescribedrelativetoFS,soadigitalreferencelevel

of-20dBFShas20dBofheadroombeforehittingtheFSclippingpoint.

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