Teledyne-lecroy Zi Oscilloscope Synchronization ProBus Module (Zi- Manual de usuario descargar pdf (Pagina 12)

ZiOscilloscopeSynchronizationModule

12

918246‐00‐RevA

5. UponcompletionofeitherUserEdge orPeriodicdeskewadjustments;theMasterandSlaveoscilloscope

nowhaveonechanneldeskewedinreferencetooneanother.Younowneedtodeskewtheremaining

channelsontheMasteroscilloscopewithreferencetotheMasterreferencechannel,andtheremaining

channelson

theSlaveoscilloscopewithreferencetotheSlavereferencechannel.

Using Master and Slave Deskew Channel References to Deskew the

Remaining Channels

AfterusingyoursignalreferencetodeskewC2(Master)andC2(relabeledC6,Slave),deskewtheremaining

channelsinthefollowingmanner.

Deskewing Remaining Slave Channels

• DisconnecttheSMApowersplitterorPCF‐200DeskewFixturefromtheC2(Master)inputandconnectto

theC3(orrelabeledC7)channelontheSlaveoscilloscope.Usetheprevious1‐4stepstodeskewC3

(relabeledC7)toC2(relabeledC6)ontheSlave.

Note:DonotadjustthedeskewontheC2(relabeled C6,Slave)Channelsincethisisthereference.

AlwaysadjustdeskewontheotherSlavechannelsC3(relabeledC7),C4(relabeledC8),andC1

(relabeledC5)tothisreference.

• RepeatthepreviousstepfortheremainingC4(relabeledC8),andC1(relabeledC5)Slavechannels.

• Uponconclusionofthesesteps,allSlavechannelsaredeskewedwithreferencetotheC2(relabeledC6)

Slavereferenceestablishedearlier.

Deskewing Remaining Master Channels

• DisconnecttheSMApowersplitterorPCF‐200DeskewFixturefromtheSlaveoscilloscopecablesor

probesandconnectittotheMasteroscilloscopecablesandprobes.Oneoftheconnectionsshouldbeto

C2(Master),andtheothertoC3(Master).

• Usetheprevious1‐4steps

todeskewC3(Master)toC2(Master).

Note:DonotadjustthedeskewontheC2(Master)Channelsincethisisthereference.Alwaysadjust

deskewontheotherMasterchannelsC3,C4,andC1tothisreference.

• RepeatthepreviousstepfortheremainingC4,andC1Masterchannels.

• Uponconclusionofthesesteps,allMasterchannelsaredeskewedwithreferencetotheC2(Master)

referenceestablishedearlier.

Obtaining Most Accurate Results

Theaboveproceduredescribesthemos taccuratedeskewpossibleusingtheZi‐8CH‐SYNCH.However,more

accuracymaybeobtainedthroughanadditionalmanualadjustmentofsinglelongacquisitionsofcustomer

data.

Forinstance,theMasterandSlaveoscilloscopescanbedeskewedwithreferencetoeachotherwithin2.5ps

rms

,

andindividualchannelsontheSlaveorMastercanbedeskewedtomuchbetterthan1pswithreferenceto

eachother.However,ausermaydesirebetterthan2.5ps

rms

skewbetweentheMasterandSlavechannels.

Inthiscase,deskewtheMasterandSlaveoscilloscopesasdescribedabove,andthenusethelongmemoryof

theLeCroyoscilloscopestomakeasinglelongacquisition.Oncetheacquisitioniscompletedandallchannels

aredisplayedontheMasterdisplaygrid,

createzoomwaveformsoftheC2(Master)andC2(relabeledC6,

Slave)previouslyusedasreferencechannelsfordeskewingtheMastertotheSlaveoscilloscope.

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Teledyne-lecroy Zi Oscilloscope Synchronization ProBus Module (Zi- Manual de usuario Pagina 12

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