LeCroy Waverunner 1 LT Series Owners Manual

7/22/2019 LeCroy Waverunner 1 LT Series Owners Manual

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OOPPEE RRAATT OORRSS MMAANN UUAALL

JJAANNUUAARRYY 22000022


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LeCroyCorporation700 Chestnut R idgeR oad

Chestnut R idge, N Y 109776499

T el: (845) 5786020, Fax: ( 845) 5785985

Internet:www.lecroy.com

2002 byL eC royCorporation. A ll rightsreserved. I nformation in this publication supersedesall earlier versions.

Specificationssubject to change.

L eCroy, P roBusand SM A R T T rigger are registered trademarks, and A ctiveD SO , ScopeE xplorer, WaveA nalyzer and

Waverunner are trademarks, of L eC royCorporation. C entronicsi sa registered trademark of D ata C omputer C orp. E pson

is a registered trademark of E pson A merica I nc. M athcad is a registered trademark of M A T H SO FT I nc. M A T L A B is a

registered trademark of T heM athWorks, I nc. M icrosoft, M S and M icrosoft A ccessare registered trademarks, and Windows

and N T trademarks, of M icrosoft C orporation. P owerPC is a registered trademark of I BM M icroelectronics. D eskJet,

T hinkJet, Q uietJet, L aserJet, PaintJet, H P 7470and H P 7550 are registered trademarks of H ewlett-Packard C ompany.

L T X X X -O M -E R ev B


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LT X X X -O M -E R ev B I SSU E D : January 2002 iii

T A B L E O F C O N T E N T S

INTRODUCTION........................................................................................................1

FIRST THINGS............................................................................................................3

WhenYourWaverunner is Delivered ........................................................................................... 3CH EC K T H A T Y O U H AV E EV ER Y T H I N G ..................................................................................................3

BE SU R E T O R E A D T H I S WA R R A N T Y .........................................................................................................3

T A K E AD VA N T AG E O F M A I N T EN A N CE AG RE EM EN T S..................................................................4

O BT A I N A SSI ST A N C E .........................................................................................................................................4

RE T U RN A PR O D U CT FO R SER V I CE O R RE PA I R ..................................................................................4

ST AY U P-T O -D A T E ............................................................................................................................................... 4

SafetyFirst ..........................................................................................................................6O P ER A T E I N A SA FE EN V I RO N M E N T ....................................................................................................... 6

G ET T O K N O W T H E WA RN I N G SY M BO L S...............................................................................................6

CH O O SE T H E C O R R E CT PO WE R SO U RC E ...............................................................................................7M A I N T A I N P O WE R G RO U N D .........................................................................................................................7

R EP LA CE WI T H T H E CO R R E CT FU SE S......................................................................................................8

CL EA N Y O U R WAV ER U N N ER (BU T L ET U S M A I N T A I N I T )..............................................................8

Up andRunning..............................................................................................................................9G ET T O K N O W WAV ER U N N ER FRO N T PA N EL ............................................................................... 9

I N ST A L L A N D PO WE R U P.................................................................................................................................9

G ET T O K NO W WAV ER U N N ER BAC K PA N EL ................................................................................10

I N I T I A L I Z E ............................................................................................................................................................12

CH E C K Y O U R WAV E RU N N E R SYST E M ....................................................................................................12

A D D A N O PT I O N ?..............................................................................................................................................13

U PD A T E T O T H E LA T E ST FI R M WA R E ?....................................................................................................13

SAV E T H E SCR EE N (A N D E N ER G Y ) ..........................................................................................................13

D O Y O U PRE FER YO UR CO NT RO LS WIT H SO U N D A N D AU T O -RE PEA T ?.............................14

PPAARRTT OONNEE:: GGEETTTTIINNGG SSTTAARRTTEEDD .............................15CHAPTER ONE:CATCH ANEWWAVE...............................................................17

ViewYourWaveform......................................................................................................................17U SE T I M E/ D I V T O A D JU ST T H E T I M EBA SE .........................................................................................19

A D JU ST SEN SIT I V I T Y A N D PO SI T I O N .....................................................................................................20

Z O O M A N D SCR O LL AU T O M A T I CA LL Y ..................................................................................................20

U SE T H E PO SI T I O N A N D Z O O M CO N T RO LS.......................................................................................22

SE T U P T H E T I M E BA SE ...................................................................................................................................23


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SE T T H E CO U PL I N G .........................................................................................................................................24

SE T U P FO R C A L A N D BN C SI G N A L S.......................................................................................................25

CHAPTER TWO:SIMPLYTRIGGER..................................................................... 29

EdgeTrigger onSimpleSignals.....................................................................................................29CO N T RO L T R I G G E R I N G ................................................................................................................................ 29

SE T U P A N E D G E T R I G G E R ......................................................................................................................... 30U SE WI N D O W T R I G G E R .................................................................................................................................33

T RI G G E R SO U RC E .............................................................................................................................................34

O BT A I N A T R I G G ER ST A T U S SU M M A RY ................................................................................................35

CHAPTER THREE:DISPLAYYOURSIGNAL...................................................... 37

DisplayPersistence........................................................................................................................37V I EW SI G N A L CH A N G ES O V ER T I M E ..................................................................................................... 37

SE T U P Y O U R D I SPL AY .................................................................................................................................... 38

SE T U P FO R PE R SI ST E N CE ............................................................................................................................39

CH O O SE A G R I D ST Y LE ................................................................................................................................. 40

Saveand Recall YourPanel Setups.................................................................................................42SAV E PA N E L SET U PS ........................................................................................................................................42

R E CA LL PA N E L SE T U PS.................................................................................................................................. 43

CHAPTER FOUR:CHOOSE AMEASURE TOOL................................................ 45

Measurewith Cursors....................................................................................................................45CO N T RO L T H E T I M E CU R SO RS .................................................................................................................. 45

CO N T RO L T H E A M PL I T U D E CU RSO RS................................................................................................... 46

MeasureAutomatically with Parameters........................................................................................50CH O O SE A ST A N D A R D PA R A M E T E R .......................................................................................................51

T U R N O FF CU R SO R S A N D PA R A M E T E R S............................................................................................... 52

CHAPTER FIVE:USE MATH TOOLS.................................................................... 55

MakeMathEasy............................................................................................................................55SET U P T O D O WAV EFO R M M A T H EM A T I CS......................................................................................... 56

U SE A M A T H T O O L ...........................................................................................................................................57

PE R FO R M A N FFT O PE R A T I O N .................................................................................................................. 58D O SU M M ED AV E R A G I N G ............................................................................................................................ 61

Saveand Recall Waveforms............................................................................................................63O BT A I N A WAV EFO RM O R M E M O RY ST A T U S RE PO RT ................................................................... 65

CHAPTER SIX:DOCUMENT YOURWORK......................................................... 67

MakeaHardCopy.........................................................................................................................67PR I N T , PL O T O R CO PY .................................................................................................................................... 68

ManageFloppyorCardFiles.........................................................................................................69CU ST O M I Z E FI L E N A M ES.............................................................................................................................. 70

A D D A N E W D I R E CT O RY ............................................................................................................................... 71


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TableofContents

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CO PY FI L ES ...........................................................................................................................................................72

PPAARRTT TTWWOO:: LLOOOOKKIINNGG DDEEEEPPEERR..............................75CHAPTER SEVEN:AQUESTIONOFTIMEBASE...............................................77

ChooseaSamplingMode..............................................................................................................77SI N G LE-SH O T WAV ERU N N ER S BASIC CA PT UR E T ECH N I Q U E ............................................77

R I S FO R HI G H E R SA M PL E RA T E S.........................................................................................................78

RO LL D I SPL AY I N R E A L-T I M E................................................................................................................78

SEQ U EN CE WO RK I N G WI T H SEG M E N T S........................................................................................79

PA I R I N G CH A N N EL S........................................................................................................................................80

UseaSampling Mode.....................................................................................................................81SE T U P FO R SI N G L E -SH O T O R R I S ............................................................................................................81

SE T U P FO R SEQ U E N CE CA PT U R E ............................................................................................................82

O B T A I N A SE Q U EN CE ST A T U S SU M M A RY .............................................................................................83

O R SA M PL E E X T E R N A LL Y .............................................................................................................................84

CHAPTER EIGHT:TRIGGERSMART...................................................................87

HoldOff byTimeorEvents.........................................................................................................87

H O L D O FF BY T I M E ..........................................................................................................................................87H O LD O FF BY E V E N T S ...................................................................................................................................88

Trigger SMART .............................................................................................................................89CA T CH A G L I T CH ...............................................................................................................................................89

CA PT U R E RA R E PH E N O M EN A ....................................................................................................................93

T R I G G E R O N I N T ER VA LS ..............................................................................................................................96

Q UA L I FY A SI G N A L .........................................................................................................................................100

T R I G G E R O N L O ST SI G N A LS .....................................................................................................................103

T R I G G E R O N T V SI G N A LS...........................................................................................................................106

T R I G G E R PA T T E R N .........................................................................................................................................108

CHAPTER NINE:DISPLAYMORE.......................................................................113

TransformYourVision.................................................................................................................113

PaintYourDisplay.................................................................................................................... 116CH A N G E Y O U R PA L ET T E ............................................................................................................................117

SetUp XY Display........................................................................................................................120

CHAPTER TEN:USE ADVANCEDMATH TOOLS............................................ 125

ComputeExtremaWaveforms......................................................................................................125RescaleandAssign Units.............................................................................................................127EnhanceResolution .....................................................................................................................128Do MorewithFFT .......................................................................................................................132

D O FFT AV E R A G E ............................................................................................................................................132

D O A D D I T I O N A L P RO C E SSI N G ................................................................................................................132


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U SE CU R SO R S WI T H FFT ..............................................................................................................................132

SET FFT SPA N .....................................................................................................................................................135

UseanAdvancedMath Function................................................................................................. 137ResampletoDeskew....................................................................................................................138PlotTrends................................................................................................................................... 139

R E A D T R E N D S................................................................................................................................................... 141

CHAPTER ELEVEN:ANALYZEWITH PARAMETERS.....................................145UseCustomParameters............................................................................................................... 145

CU ST O M I Z E A PA R A M E T E R .......................................................................................................................146

Testfor PassandFail ...................................................................................................................147SE T U P A PA SS/ FAI L T E ST ........................................................................................................................... 147

PA SS/ FA I L T E ST O N A M A SK ..................................................................................................................... 148

M A K E A WAV E FO R M M A SK ........................................................................................................................149

CH A N G E A T E ST A CT I O N ............................................................................................................................ 149

ChooseaParameter...................................................................................................................... 153

CHAPTER TWELVE:USEWAVERUNNERWITH PC.......................................161

Transfer DataandImagestoPC..................................................................................................161E X PL O R E Y O U R SCO PE ................................................................................................................................162

M O N I T O R Y O UR R EM O T E CO N T RO L O PER A T I O N S.....................................................................163SaveWaveformsin ASCII.............................................................................................................164

SAV E I N A N A SC I I FO R M A T ......................................................................................................................... 165

UseASCII Formats......................................................................................................................167SAV E T O SPR E A D SH E ET ............................................................................................................................... 167

PL O T A WAV E FO RM I N SPR E A D SH E E T ................................................................................................170

U SE M A T H C A D .................................................................................................................................................. 171

U SE M A T L A B ...................................................................................................................................................... 173

PPAARRTT TTHHRREEEE:: WWAAVVAA OOPPTTIIOONN................................175CHAPTER THIRTEEN:PARAMETERS...............................................................177

A ValuableTool forWaveformAnalysis........................................................................................177

SE T U P FO R H I ST O G R A M S .......................................................................................................................... 177PA R A M ET E R M A T H ......................................................................................................................................... 185

CHAPTER FOURTEEN:MAKINGHISTOGRAMS.............................................191CreateandViewaHistogram...................................................................................................... 191

SE T T I N G BI N N I N G A N D SCA L E ............................................................................................................... 196

CH O O SI N G H I ST O G RA M PA RA M ET ER S...............................................................................................200

U SI N G M EA SU R E M E N T CU R SO RS...........................................................................................................201

Z O O M IN G SEG M E N T E D T R A C ES............................................................................................................203

CHAPTER FIFTEEN:HOWHISTOGRAMSWORK............................................205Theoryof Operation....................................................................................................................205


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LT X X X -O M -E R ev B I SSU E D : January 2002 vii

D SO PR O CE SS.....................................................................................................................................................206

PA R A M E T ER BU FFE R .....................................................................................................................................206

CA PT U R E O F PA R A M E T ER E V E N T S .......................................................................................................207

H I ST O G R A M PA R A M ET E R S.........................................................................................................................207

Z O O M T RA CE S A N D SEG M E N T ED WAV EFO R M S ............................................................................208

H I ST O G R A M PE A K S........................................................................................................................................208

BI N N I N G A N D M EA SU RE M E N T A CC U RA CY ......................................................................................209

CHAPTER SIXTEEN:HISTOGRAMPARAMETERS..........................................211

avg................................................................................................................................................ 211fwhm.............................................................................................................................................212fwxx..............................................................................................................................................213hampl............................................................................................................................................214Hbase...........................................................................................................................................215high...............................................................................................................................................216hmedian........................................................................................................................................217hrms..............................................................................................................................................218htop...............................................................................................................................................219low................................................................................................................................................220maxp.............................................................................................................................................221

mode.............................................................................................................................................222pctl................................................................................................................................................223pks................................................................................................................................................224range.............................................................................................................................................226sigma............................................................................................................................................227totp................................................................................................................................................228xapk..............................................................................................................................................229

APPENDIX:ARCHITECTURE ANDSPECIFICATIONS................................... 231

InstrumentArchitectureOverview...............................................................................................231PR O CE SSO R S.......................................................................................................................................................231

A D Cs.......................................................................................................................................................................231

M E M O R I E S...........................................................................................................................................................231

R I S............................................................................................................................................................................231T R I G G E R SY ST E M ............................................................................................................................................231

A U T O M A T I C CA L I BR A T I O N ........................................................................................................................232

D I SPL AY SY ST E M ..............................................................................................................................................232

I N T E R FAC E A N D PA N E L SET U PS.............................................................................................................232

R EM O T E CO N T RO L ........................................................................................................................................232

Specifications................................................................................................................................234M O D EL S................................................................................................................................................................234

A CQ U I SI T I O N SY ST E M ....................................................................................................................234

T I M E BA SE SY ST E M ..........................................................................................................................................235


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T RI G G E R I N G SY ST E M ................................................................................................................................... 236

SM A RT T R I G G ER T Y PE S............................................................................................................................... 236

A U T O SET U P ........................................................................................................................................................ 237

PRO BES.................................................................................................................................................................237

CO LO R WAV EF O R M D I SPL AY .................................................................................................................... 237

A N A LO G PE R SI ST EN C E D I SPL A Y ............................................................................................................ 237

Z O O M EX PA N SI O N T R A CE S....................................................................................................................... 237

R A PI D SI G N A L PR O C E SSI N G ..................................................................................................................... 238

I N T ER N A L WAV EF O RM M E M O RY ........................................................................................................... 238

SET U P ST O R A G E .............................................................................................................................................. 238

M A T H T O O L S.....................................................................................................................................................238

M E A SU R E T O O L S............................................................................................................................................. 239

EX T EN D ED M A T H A N D M EA SU RE M EN T S O PT I O N ......................................................................239

WAV E A N A LY Z E R O PT I O N ...........................................................................................................................239

SPE CI A L A PP LI C A T I O N SO LU T I O N S......................................................................................................239

I N T ER FAC E ......................................................................................................................................................... 240

O U T PU T S..............................................................................................................................................................240

G E N E R A L .............................................................................................................................................. 240

GLOSSARYOFTECHNICAL TERMS...................................................................243


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LT X X X -O M -E R ev B I SSU E D : January 2002 1

I N T R O D U C T I O N

About thisManual

L ike the Waverunner scopeitself, this manual isdesigned to make your measurementsaseasy as 123. Each

section showsyou step bystep how to use the oscilloscopeto solve simple or complex problems.

U se themanual with Waverunner in front of you. T hen youll see clearly just what is beingreferred to; and you

can immediately put into action what isdescribed.

T hemanual hastwo main parts:

Part O ne, G etti ng St ar ted, is for new usersand basic operations. I t explainsthe most important

Waverunner features, and showsyou how to applythem. U se it when starting out and for getting quick results.

Part T wo, L oo k i ng D eeper, goesi nto moredetail. I t explainshow to perform complex measurements

using more advanced Waverunner functions. I t also looksmore deeplyinto operationscovered in Part O ne.

U se it for tackling demanding tasks, or asa reference for understanding better how your scope works.

Consult the glossaryfor clarification of oscilloscopeand related terms.

A san additi onal guide, each chapter is prefaced bya summaryof itscontents.

Watch for panelsand sectionsthroughout the manual marked bythese icons:

TT II PP ssoffer additional hintson how to get themost out of Waverunner actionsor features.

NN OO TT EE ssbring to your attention important information you should know.

T hesectionsmarked bythe magnifying glass, and printed in italic text, zoom on particular

topics. T hey offer more information on thesubject, where appropriate.


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2 I SSU ED : January 2002 LT X X X -O M -E R ev B

F I R S T T H I N G S. . . First

Inthispreface, seehow

To makesureyouhaveeverything

To operatewith safety

To gettoknowyour Waverunner scope

Toinstall andpower up

ToinitializeTo check thesystemstatus

To install newsoftwareandfirmware

To activatethescreensaver

To usemenus,menubuttonsandknobs

To choosebuttonand knobpreferences


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F I R S T T H I N G S

WhenYourWaverunnerisDelivered

CHECK THAT YOU HAVE EVERYTHINGFirst, verify that all itemson thepacki nglist or invoice copy have been shipped to you. (T heitemsare also

listed below.) Second, check the SY ST E M ST A T U S display once your Waverunner oscilloscope isinstalled (see

page 12). Contact your nearest L eCroycustomer servi ce center or national distributor if anything ismissing or

damaged. I f there i s something missing or damaged, and you do not contact usimmediately, wecannot be

responsible for replacement.

T hefollowing is shipped with thestandard Waverunner scope:

10:1 10 M PP006 Passive Probe oneper channel

A C Power Cord and Plug

Performance or Calibration Certifi cate

Front Scope Cover

T wo 250 V Fuses

Operators Manual

Remote Contr ol Manual

Quick ReferenceGuide

D eclaration of Conformity.

NNOOTTEE:: Thewarrantybelowreplacesallotherwarranties, expressedorimplied,includingbutnotlimitedtoanyimpliedwarrantyof merchantability, fitness, oradequacyforanyparticularpurposeor

use. LeCroyshall notbeliablefor anyspecial, incidental, orconsequentialdamages,whether in contractorotherwise. Thecustomer is responsibleforthetransportationand insurancechargesfor thereturnof productstotheservicefacility. LeCroywill returnall productsunder warrantywithtransportprepaid.

BE SURE TO READ THISWARRANTY

TheWaverunner oscilloscopeis warrantedfornormal useandoperation, within specifications,fora

periodof threeyearsfromshipment. LeCroywill either repair or, atour option,replaceanyproductreturnedtooneof our authorizedservicecenterswithinthis period. However,in order todothis wemustfirstexaminetheproductandfindthatit is defectiveduetoworkmanshipormaterials andnotduetomisuse, neglect,accident, orabnormal conditionsoroperation.

Spareand replacementparts, andrepairs, all havea90-daywarranty.

Theoscilloscopesfirmwarehasbeen thoroughlytested andis presumed tobefunctional.Nevertheless,it is suppliedwithoutwarrantyof anykindcoveringdetailedperformance. ProductsnotmadebyLeCroyarecoveredsolelybythewarrantyof theoriginal equipmentmanufacturer.


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TAKE ADVANTAGE OF MAINTENANCE AGREEMENTS

Weoffer a variety of servi cesunder theheading of M aintenance A greements. T hese give extended warranty

and allow you to budget maintenance costsafter the initial three-year warrantyhasexpired. I nstallation,

training, enhancements, and on-site repairs amongother servi ces areavailable through special

supplemental support agreements. I nquire at your L eCroy customer service center or national distributor.

OBTAIN ASSISTANCE

H elp with installation, calibration, and theuse of your Waverunner scopein a range of applicationsisalso

available from your customer service center.

RETURN A PRODUCT FOR SERVICE OR REPAIR

I f you do need to return a L eCroy product, i dentify it by itsmodel and

serial numbers(see page12). D escribethe defect or failure, and provide

your name and contact number.

For factoryreturns, use a Return A uthorization N umber (R A N ),

obtainablefrom customer service. A ttach it so that it can beclearly seen on

theoutside of theshipping package to ensurerapid forwarding within

L eCroy.

Return those productsrequiring onlymaintenance to your customer

servi ce center.

TTIIPP::If youneedtoreturnyour scope, usetheoriginalshippingcarton. If thisisnotpossible, thecartonusedshouldberigid.Thescopeshouldbepacked sothatit issurrounded byaminimumof

four inches(10cm) of shockabsorbentmaterial.

Wi thin the warrantyperiod, transportation chargesto the factory will be your responsibility, while products

under warranty will be returned to you with transport prepaid byL eCroy. O utside thewarranty period, you will

have to provide uswith a purchase order number before the work can bedone. You will bebilled for partsand

labor related to the repair work, aswell asfor shipping.

Y ou should prepay return shipments. LeCroycannot accept CO D (Cash O n D elivery) or Collect Return

shipments. Werecommend using air freight.

STAY UP-TO-DATE

T o maintain your Waverunner scopesperformance within specif ications, have uscalibrate it at least once a year.

L eCroyoffersstate-of-the-art technology bycontinually refi ning and improving the instrumentscapabilities

and operation. Wefrequentlyupdate both fi rmware and software during service, freeof charge during

warranty.

Y ou can also install new fi rmware yourself, without theneed of a factoryrefit. Simply provide uswith your

Waverunner serial number and I D , and the version number of the softwarealready installed (see page12),

along with ordering information. Wewill provideyou with a unique option key that hasa code to beentered

through theinstrumentsfront panel to upgrade your software. I n additi on, thevery latest versionsof L eCroys

uniqueoscilloscopesoftwareapplicationscan be downloaded from the I nternet, free of charge. I ncluded are

ScopeExplorer and A ctiveD SO .


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First


ScopeExplorer is a highlypractical P C-based connectivity tool that interfacesWaverunner to a PC that is

running M icrosoft Windows, via the rear panel G PI B (I E E E 488) or R S-232 port. Specially designed by

L eCroyfor i tsoscilloscopes, ScopeE xplorer allowsyou to perform data and image transfersand other remote

operationsfrom scopeto PC with just a few keyboard strokesor mouse clicks. See Chapter 12, U se

Wav erunner wi th P C , for more about using ScopeExplorer with your Waverunner scope.

ScopeE x plorer now has a vir tual fr ont panel t o all ow ful l contr ol of r emote scopes.

ActiveDSO works on anyP C running Windows95, 98 or N T, and enablesyou to exchange data with avarietyof Windowsapplicationsor programming languagesthat support theA ctiveX standard, such asM S

O ffice, I nternet Explorer, V isual Basic, V isual C+ + and V isual Java. A ctiveD SO hidestheintricaciesof

programmingfor each of these interfacesand providesa simpleand consistent interface to thecontrolling

application. Y ou can also visuallyembed A ctiveD SO in anyO L E automation compatible client and use it

manually without programming. Y ou could, for example, generate a report byi mporting scopedata straight

into E xcel or Word, analyzeyour waveformsbybringing them directlyinto M athCad, archive measurement

results on the fly in a M icrosoft A ccess database, and automatetestsusing V isual B asic, Java, C + + , or

Excel ( V BA ).

V isit our website at http:/ / www.lecroy.com/ softwareto download these and other free softwareapplications.


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SafetyFirst

OPERATE IN A SAFE ENVIRONMENT

Before installing your Waverunner, ensure that itsoperating

environment will bemaintained within these parameters:

T emperature: 5 to 40 C (41 to 104 F)

H umidity:


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First


Protective Conductor T ermi nal NNOOTTEE:: Waverunner automaticallyadaptstothelinevoltagepresent:

ChassisT ermi nal 115V(90132V)

4566Hz

A lternating Current O nly

220V(180250V)

4566Hz

WARNING D enotesa hazard. I f a WAR N I N G is indicated on the instrument, do not proceed until itsconditionsare understood and met (see also CA U T I O N ).

CHOOSE THE CORRECT POWER SOURCE

Waverunner operatesfrom a single-phase, 115 V (90 to 132V ) or 220 V (180 to 250 V ), A C (~ ) power source at

45 H z to 66 H z.

N o voltage selection is required because theinstrument automatically adaptsto linevoltage. T hepower supply

of the oscilloscope is protected against short circuit and overload byone 5x20 mm fuse (T 6.3 A / 250 V ). See

next page for replacement procedure.

MAINTAIN POWER GROUND

M aintain the ground line to avoid electric shock.

T hecurrent-carrying conductorscannot exceed 250 V rms with respect to ground potential. Waverunner is

provided with a three-wire electrical cord containing a three-terminal polarized plug for line voltage and safety

ground connection. T heplugsground termi nal i sconnected directly to theframeof theunit. For adequate

protection against electrical hazard, this plug must beinserted into a mating outlet containing a safetyground

contact. Set thepower switch to STA N D BY before connecting or disconnecting thepower cord.


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REPLACE WITH THE CORRECT FUSES

For continued fi re protection at all line voltages, replace fusesonlywith those of thespecif ied typeand rating.

D isconnect thepower cord before inspecting or replacing a fuse. O pen thefuse holder (located directly to the

left of themainspower plug) usinga small, flat-bladed screwdriver. Removetheold fuse and replace it with a

new 5x20 mm fuse (T 6.3 A / 250 V ).

CLEAN YOUR WAVERUNNER (BUT LET USMAINTAIN IT)

M aintenance and repairs should be carried out exclusivelyby a L eCroytechnician.

Clean onlythe exterior of your Waverunner, using a damp, soft cloth. D o not use chemicalsor abrasive

elements. U nder no circumstancesallow moisture to penetratethe oscilloscope. To avoid electric shocks,

disconnect the instrument from the power supply before cleaning.

CAUTIONRiskof electricshock. Nouserserviceablepartsinside. Leaverepairtoqualifiedpersonnel.


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Before a display appears, the instrument will automatically perform hardware and software self-tests, followed

bya full system calibration. T hef ront panel STA N D BY L ED will be lit during thissequence. T hefull testing

procedurewill take about 10seconds, after which a display appears.

4. Press

UTILITIES

to display the U T I L I T I E S on-screen menus.

5. T hen pressthebutton besidethemenu to set thetimeand date.

GET TO KNOWWAVERUNNER BACK PANEL

RS-232-C Port GPIBPortCentronicsPort

PowerInputBNCSignalOutput

ExternalMonitorPort PCCardSlot(Memory/Hard-Diskcard)

U se the RS-232-C and G PI B port s t o connect your Waver unner scope to a computer or t er minal, the

ex ter nal monit or port t o di splay your waveforms on another monit or, and t he Centr onics port to

connect compati ble pri nters or other devices. U se the PC Car d slot for t he PC M emor y Car d andport able H ard D isk opti ons, and the BN C output for ex ter nal clock si gnals.


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First


TO NAVIGATE THROUGH ME N U S

Menus such as enabl e you t o per f or m act i ons or adj ust set t i ngs.

Themenubuttonbesi de each di splayed menu cont r ol s t hat menu.

Longer menus that span the breadth of two butt ons are contr ol led by bot h butt ons.

Capitalizedmenus for ex ampl e per for m speci fi c act i ons.

Thetwomenuknobswor k t oget her wit h t he two menu butt ons besi de them.

Combinationsof knobsand buttons control continuously adjustable variables. The button selectsor changes the vari able, whi l e the k nob adjusts i t s val ue.

Menusaregrouped and shown t ogether accordi ng to t hei r funct i on. Pr ess a butt on or tur n a k nob t osel ect a part i cul ar menu or an i t em on a menu. T ravel up or down i n t he menu l i st and change t he

sel ecti on. Or change values and set t i ngs.

Thedarker,labeledbuttons also play a role in menu selection:

PANELS

for ex ampl e was used

to sel ect t he menus for i ni t i ali zat i on. W hen you pr ess any one of t hese, i t offer s access to r el ated

menus in its group.

Menuswithshadows l ead t o other menus: Pr ess t hei r butt ons t o di splay those other s.

Press

RETURN

toreturn t o a shadowed menu. A nd use thi s butt on whenever you wish t o go back t othe pr evi ous menu di splay.

Arrows on the side of a long menui ndicate that you can scr oll up or down the menu li st.Pr ess one or t he other of t hese menus butt ons t o move i n the desi r ed di r ection, and to view or select

any menu i t em not di splayed. A r r ows di sappear when you r each the begi nni ng or end of the menu

l ist.


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INITIALIZE

I niti alize your Waverunner scopeto itsbasic default waveform display settings:

6. Press

PANELS

to display the PA N E L SET U PS menu group.

7. I f Recall isnot selected, pressthe button once to select it:

8. T hen pressthe button beside .

I nitialize to Waverunner default settingswhenever you wish to clear your settingsand make a fresh start on a

new measurement.

CHECK YOUR WAVERUNNER SYSTEM

9. Press

SCOPESTATUS

to show the ST A T U S menus.

10. Pressthe top button to highlight and select System. T he screen will show your Waverunnersserialnumber, theversion of software installed and thedate of its release, aswell asa full list of your currently

installed software and hardware.

Contact L eCroycustomer service immediately if anyof theoptionsyou ordered have not been installed.


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First


ADD AN OPTION

T his menu will also bedisplayed when you select System:

U se it to install new options without theneed to return your Waverunner for a refit.

1. Pressthat menusbutton to display

2. T hen pressthat menusbutton to display theA D D O PT I O N menus. Use them whenever you wish to add

a Waverunner option bymeansof a special code. C ontact your LeCroysalesor servi ce center to obtain the

code.

UPDATE TO THE LATEST FIRMWARE

Your Waverunner comeswith thelatest fi rmware installed. But to take advantage of our continuous

improvement, contact usto obtain a floppy disk or card containingthelatest fi rmware. T hen use these menus

to install it:

1. Press

UTILITIES

to displaytheU T I LI T I ES menus.

2. Pressthe button for , then for the one for .

3. Place thefloppy or card in theWaverunner and pressthebuttonsto select Floppyor Card and thenU pdate Flash. T he newlyinstalled fi rmwarewill appear on the System Statusscreen (see above).

You may also download thefi rmware from the internet, using ScopeE xplorer.

SAVE THE SCREEN (AND ENERGY)Enableor disableyour Waverunnersscreen saver:

1. Press

DISPLAY

to show the D I SPL AY SE T U P menus.

2. Pressthe button for M ore D isplay Setup to accessthis menu:


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3. Pressits button, then selectYesor No from

When enabled, thebuilt-in screen saver is activated 10 minutesafter the last use of a front panel control. T his

is a complete display shutdown of thei nternal screen an E nergy-Saver. T hefront panel L E D light will

indicate when thescopei sin thescreen-savingST A N D BY state. Pressanyfront panel button to restorethescreen.

DO YOU PREFER YOUR CONTROLSWITH SOUND AND AUTO-REPEAT?

H ave your buttonsand knobsrepeat their actionsand make an audible sound when used:

1. Press

UTILITIES

to display the U T I L I T I ES menus. T hese you will find useful for a varietyof functions.

2. Pressthe button for , then the button for .

3. M ake your preferencesby meansof theU SER PR EFS menusdisplayed.

Wi th Pushbutton auto-repeat On, all front panel buttons, when pressed and held in, will move the selectionautomatically and sequentially through all itemsi n a menu.

With audible feedback for buttonsand knobsOn, an audible click will sound when anyf ront panel button ispressed or any knob isturned.


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PPAARRTT OONN EE

GGEE TT TT II NN GG SSTT AARR TT EE DD

Thispartofthemanual coversthemain Waverunner featuresandexplains, stepbystep,howtousethem. Youll gettoknowyourscopeandstartworkingwithit quickly andeffectively.Captureandviewwaveforms.Zoomandscroll. Learntheartofdisplay. Usemathand measurementtools.Documentyourwork.


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C H A P T E R O N E : CatchaNewWave

Inthis chapter,seehow

To selecttheinputsignal channel

To usemenusandcontrols for basic operations

To findyour wayaroundthedisplay

To adjustthetimebase, gain andpositionof thesignal

To zoom manuallyandautomaticallyTo setupthetimebase

To setsignal coupling

To calibrateand usethepassiveprobe

TosetuptheCAL and BNC outputs


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C H A P T E R O N E CatchaNewWave

ViewYourWaveform

T ake these stepsto capture and view your signal; set time and voltsper division; zoom and auto-scroll:

1. Connect your signal to theWaverunner (C hannel 1 input for thisexample).

2. Presstheblue

AUTO

SETUP

button to automatically set the (E dge) trigger level, timebase, and vertical settings

for display of thei nput signal. Pressi t again to confirm theaction.

3. Press 1 to select CH A N N E L 1 and display the basic Waverunner menus.

4. U se these menusin thestepson thefollowing pagesto adjust the signalstrace

on the screen.

T o turn Channel 1 on or off. TTIIPP:: Press1

twicetoturnthechannel onoroff.

T o accessthe CH A N N E L Couplingmenus. See page 24.

T o automatically make a zoomed trace of thesignal. U se thevertical

PO SI T I O N k nob to movethe trace so that it is clearlyvisible. Use the

vertical Z O O M knob to adjust its expansion vertically. See page 22.

T o automaticallyset gain and offset, and fi nd thesignal.

T o select fixed or variable gain. Select variable to control thechannels

gain continuously. See page 20.

TTIIPP:: WithAUTO SETUP youcanautomaticallysetupsignalsin the5mV to40V rangewitha

frequencyof50Hz andadutycycleassmall as0.1%.

To select thegrid style and number. N ext page: Single

grid. See also Chapter 3, D i spl ay Y our Si gnal.


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P A R T O N E : G E T T I N G S T A R T E D


TO FI N D YOU R WAY AROUND TH E WAVERUNNER DISPLAY

Real-T ime Clock field:power ed by a batt er y-back ed r eal- t i me cl ock , i tdisplays t he cur r ent date and t i me.

Di splayed Trace Label i ndi cates each channel or channel di splayed, thetime/ div and volts/ div settings, and cursor readings where appropriate.

Acquisition Summary field: t i mebase, vol t s/ di v, probeatt enuati on, and coupli ng for each channel , wit h the sel ect edchannel hi ghl i ght ed.


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Trigger Level arr ows on both si des of the gri d t hat markt he tr i gger vol t age level r el ati ve to ground l evel.

Trigger Delay is an ar r ow i ndicati ng the tri gger ti me r elati ve to the tr ace.

Trigger Status field shows sample rate and trigger re-arming status(A UT O, N ORM A L , SI N GL E , STOPPE D ). The small squar e icon fl ashesto indicate that an acquisition has been made.

Trigger Configuration field contai ns an i con i ndicati ng the t ype oftrigger, and information on the triggers source, slope, level and coupling, andother information when appropriate.

Trace and Ground L evel shows t he tr ace number and gr ound l evelmarker.

Ot her display areas i ncl ude theT ime and Frequency field, l ocated bel ow t he gri d and stati ngtime and frequency relative to cursors, and a Message field pl aced above the gri d and r eser ved forspeci al messages. For mor e about t he di splay, see Chapter 3, D i spl ay Your Signal.

USE TIME/ DIV TO ADJUST THE TI MEBASE

5. Turn

TIME / DIV

s ns

to adjust the timebase asdesired.

NNOOTTEE:: AUTO SETUP operatesonlyonchannels thatareturnedon,unlessnochannels areturned on.Then all channels will beaffected.When morethanonechannel isturnedon, thefirstchannel innumerical order with asignal

appliedtoit will beautomaticallysetupforedgetriggering.

T hetime per division is set in a 125 sequence. Waverunner automatically adaptsitself to use themaximum

sampling rate whenever thetimebase is changed. T heselected time/ div setting is shown in thetrace label at the

top left portion of thescreen, and thesampling rate in thetrigger statusfi eld at thebottom right-hand corner.


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ADJUST SENSITIVITY AND POSITION

6. Turn

VOLTS / DIV

V mV

to reducethevertical gain

sensitivity. T hevolts/ div setting isshown in the

Channel 1 trace label.

T henext two stepscan betaken (i f not already) when you

wish to finetunethe vertical gain and get a better vertical

resolution:

7. Finetunethe vertical gain byselecting variable from

the G ain menu (see page 17).

8. N ow turn the V O LT S / D I V knob through several

complete rotations, so that the entire signal reaches

from top to bottom of the grid. Fi llingthegrid in thisway, you can use thefull range of availabledigitizing

levels.

TTIIPP:: Press

UTILITIES

toselectSpecialModes.ThenselecttheChannels menutochoose

In: tosettheoffsetof again

(VOLTS/ DIV) changein voltsor verticaldivisions(thisis in volts, bydefault).

Automatic Recalibration: toturn thisfeatureonor off (defaultisOn). Offmayspeedcapture, buttimecalibrationisnotcertain duringthecaptureperiod.

Global BWL: tocontrol theglobalbandwidthlimit. WhenOn, thechosenbandwidth(seepage24) appliestoallchannels.WhenOff, abandwidthlimitcanbesetindividuallyfor eachchannel.

9. Use

OFFSET

to center thewaveform on thegrid.

ZOOM AND SCROLL AUTOMATICALLY

U se Z O O M to see more detail on your signal. T hedisplay will show theoriginal signal and its zoomed copy.

10. Press A to display the T R A CE A menus( to display T race B, C , or D, pressi tsbutton).

11. Press A again or the top button to display the trace and itslabel. (D o the same to turn off a trace.)

12. Pressthe button for:

T hemenusshown on thenext page will bedisplayed.

TTIIPP:: Togobacktothedefaultpower-upsettings, simultaneously pressthesecondandfifthmenubuttonsfromthetop, and

the 1 CHANNEL SELECT 1button.


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13. U se these menusto scroll back and forth through thefull length of oneor all of your zoom copies.

M U LT I -Z O O M unifiesthecontrol of all zoom traces, while A U T O -SCRO L L

walksthe zoom trace or tracesacrossthe referenced trace.

When Off, onlythe active zoom trace is controlled. When On, alldisplayed zoom traces(A , B, C, D ) aresimultaneously controlled

(automatically) with A uto Scroll and (manually) with thehorizontalZ O O M and PO SI T I O N knobs. See the next page for moreon

M ulti-Z oom.

T o scroll thezoom trace from ri ght to left of screen. When playing,

the menu islabeled ST O P (PL AY I N G ) : Pressto stop.

T o scroll thezoom trace from left to right of screen. When playing,

the menu islabeled ST O P (R E V E R SI N G ) : Pressto stop.

T o scroll bydivisionsper second or number of divi sions. U se div/ stoscroll continuously for viewing. U se number of divfor waveform

processing, especially Pass/ Fail testing. When processing iscomplete,thedisplay will beupdated bythe number of divisionsset.

To set scroll speed, using theknob. When scrolling by

divisions, 10 div will step thezoom trace grid-page by

grid-page acrossthe length of the referenced trace.

To return to the T R A CE A menus, whilecontinuing to

scroll, bypressing themenu button.

RETURN

T o stop scrolling and return to thepreviousmenu displayed.

TTIIPP:: Consider zoomasanextratimebasethatoffersalternativesweepspeeds. Youcandisplayasmanyasfourzoomsatonce.


30/262



USE THE POSITION AND ZOOM CONTROLS

14. T urn

POSITION

to place T race A verticallyon thegrid.

TTIIPP:: Thesmaller Waverunnerknobsareratesensitive: thefasteryourotatethem,thegreater thechangethatresultsper increment.

When usingmorethan one grid, turn PO SI T I O N to movetracesfrom one grid to another.

15. T urn

ZOOM

to adjust theexpansion factor and increase theamount of zoom.

16. T urn

POSITION

to movethe zoomed region of thetrace.

17. T urn

ZOOM

to verticallyexpand, or reduce, the zoom trace.

TO ZOOM AND MUL T I -ZOO M

You can zoom several traces from a single waveform to obtain precise timingmeasur ements and i mprove t he ti me resolut i on on your displayed waveform. Fori nstance, on a wavefor m composed of t wo pul ses separ ated by a l ong del ay, you coul dmak e Trace A a z oom of the fi rst pulse, and Tr ace B a zoom of the second.

Multi-Zoomall ows you t o move the zoomed r egi on of t he waveform along two or mor e dif fer entt races, or t wo or mor e regi ons of the same t race, si mult aneousl y. W hen you act i vate mul t i -z oom,the hori zontal zoom and posi ti on contr ol s apply t o all displayed t races A , B , C, and D

all owing you t o view simil ar secti ons of dif fer ent tr aces at the same ti me. T he vert i cal sensit i vit ycontrols still act individually on the traces.

W hen t race labels have dott ed t op and bottom edges, l ik e the one at ri ght, thi sindicates that their traces are multi-zoomed.


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SET UPTHE TIMEBASE

18. Press

SETUP

TIMEBASE

and accesstheT I M EBA SE menus.

19. U se these menusto set up thetimebase in single-shot mode. See Chapter 7, A Q uesti on of T i mebase, for moreon the sampling modes.

Single-Shotsamplingdisplaysdatacollectedduring successive single-shotacquisitionsfrom theinput channels capturenonrecurring, or verylow

repetition-rateevents, simultaneouslyon all input channels.

T o select Internal or external ECL, 0V, TTL clock modes.Select internal unlessusing an external clock signal. See Chapter 7, A

Q uesti on of T i mebase, for external clock. T heL T 364 serieshas

a Channel Use menu below SampleC lock (see Pairing

Channels in Chapter 8).

T o switch sequence mode Onor Off. U se the knob tochoose the number of segments. SeeChapter 7, A

Q uesti on of T i mebase, for sequence sampling.

T o select themaximum number of samplesto be

acquired, using themenu knob; and, to set thedefault

50k, using themenu button.


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SET THE COUPLING

20. Press 1 and then thebutton for to displaythecouplingmenus.

21. U se these menusto set input signal coupling and grounding, the channel

bandwidth limit, and theprobe attenuation.

Selectsthe signal coupling.

M ovesyour selection down thelist. When at thebottom, ashere, the

down arrow disappearsand this button becomesinactive.

PressNORMAL to set off set, volts/ div, and input coupling to displayE CL signals. P ressagain; settingsfor T T L signalsaregiven. Pressa

third time; settingswill return to those of thelast manual setup.

Pressto turn the bandwidth limit Offor reduce thebandwidth to200 M H z or 25 M H z. R educessignal and system noise and prevents

high-frequency aliasing. G lobal BWL meansthat thelimit set willapply to all channels. BWL meansthat a limit can beset individually

for each channel. See theT I P on page 20 for how to set these, using

SPECI A L M O DES.

T o set the probeattenuation factor for the input

channel. T hebuttonsscroll up or down, while the

knobsscroll theselector up and down thelist. L eCroys

ProBus system automatically sensesprobesand sets

their attenuation. T his menu then changesto indicate

thetypeof probe attached and its attenuation factor.

See thefollowingpagesfor moreon probesand

ProBus.

NNOOTTEE::

AC position:signals arecoupledcapacitively, theinputsignalsDC componentis blocked,andsignal frequenciesbelow10Hz arelimited.

DC position:signal frequencycomponentsareallowedtopassthrough, and aninputimpedance

of either 1Mor 50can beselected.Themaximumdissipationinto50 is0.5W. Wheneverthis is attained,inputswill automaticallybegrounded.Groundedwill behighlighted in theCouplingmenu andan overloadmessagewill bedisplayedin theAcquisitionSummaryfield.

Resetbyremovingthesignal fromtheinputandreselectingDC50.


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SETUP FOR CAL AND BNC SIGNALS

1. Press

UTILITIES

.

2. Press thebutton to select and displaytheCA L BNC O UT menus.

3. U se these menusto choose thetypeof signal put out at the front CA L and

rear BN C signal outputs. Set the frequency, amplitude, and pulse shape of

the calibration signal.

T o set thetype of signal from the rear BN C connector.

T o reset the CA L output to itsdefault state: a 1 kH z 1 V squarewave.

T he Waverunner automaticallysetsthe calibration signal to itsdefault

when switched on.

To select theform of thecalibration signal.

T o set the pulse level for theCA L output (range: 1.00 to

1.00 V ), using thek nob.

T o set the desired frequency of a CA L signal in therange

500 H z to 1 M H z, usingthek nob.


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TO CALIBRATE THE PASSI VE PROBE

Your Waver unner scope comes wi th a L eCr oy passi ve pr obe for each channel .

First. T ur n on your Waver unner scope.

Second. I nsert the probe l ead i n t he Channel 1 i nput .

Third. Connect the pr obe ti p t o the CA L output (see fr ont panel i ll ustr ati on i n Fi rstThings).

Fourth. A ttach t he leads all igator cli p t o the gr ound ri ng i ndicated by , located below CA L .

T he CA L si gnal wi l l be a 1 k H z squar e wave, 1 V pp.

Fifth. Pr ess

UTILITIES

, then the button to select

Sixth. Pr ess to sel ect and set the ampl i tude l evel .

Seventh. N ow sel ect t o set t he f r equency i n t he r ange 50 0 H z t o 1 M H z .

E ighth. Set channel coupli ng to D C 1 M usi ng Coupli ng (see pr evi ous page).

Ninth. Pr ess 1 to turn on Channel 1.

T enth. Pr ess

AUTO

SETUP

t wi ce.

I f overshoot or under shoot of the displayed signal occurs, adj ust t he pr obe by i nser t i ng the smallscr ewdri ver, suppli ed wi th t he pr obe pack age, i nto t he potent i ometer on the pr obe head and t ur ni ng itcl ock wi se or counterclock wi se to achieve t he opt i mal square wave contour.


35/262



HOWPROBUS HELPSYOU

L eCr oys Pr oBus pr obe syst em pr ovi des a compl et e measur ement sol ut i on f r om pr obetip to oscilloscope display.

ProBus all ows you to contr ol tr ansparent gain and offset dir ectl y fr om your fr ont panel

part i cular ly useful for vol tage, dif fer enti al, and cur r ent acti ve probes. I t uploads gain and offsetcor r ecti on fact ors fr om the Pr oBus E PROM S, and aut omati call y compensates t o achieve full ycal i br at ed measur ement s.

T hi s i ntel l i gent i nt er connect i on bet ween your Waver unner scope and a wi de r ange of accessori es of fersi mpor t ant advant ages over st andard BN C and pr obe ri ng connect i ons. Pr oBus ensur es cor r ect i nputcoupli ng by aut o-sensi ng t he probe t ype, el i minat i ng t he guesswor k and err ors t hat occur whenatt enuat i on or ampli fi cati on factors ar e set manuall y.

TTIIPP:: UseWaverunnersrear panel BNC signal outputtoprovideapulse:

For Pass/ Fail testing

Attheoccurrenceof eachaccepted trigger event(Trigger Out)

When thescopeis readytoacceptatrigger event(Trigger Rdy)


36/262


C H A P T E R T W O : SimplyTrigger


To control triggers

Tosetupan Edgetrigger

To re-armtriggering

To determinelevel, couplingandslope

To useWindowtriggerTo obtain asummaryof your trigger and systemstatus


37/262


C H A P T E R T W O SimplyTrigger

EdgeTriggeronSimpleSignals

Waverunner usesmanywaveform capture techniquesthat trigger on featuresand conditions, which you defi ne.

T hese triggersfall into two major categories:

Edge activated bybasic waveform f eaturesor conditi onssuch asa positive or negative slope, andholdoff

SMART Trigger sophisticated triggersthat enable you to use basic and complex conditionsfortriggering. See Chapter 8, T ri gger Sm ar t.

U se theEdge trigger typefor simplesignals, and theSM A RT T rigger typefor signalswith rarer f eaturessuch

asglitches.

CONTROL TRIGGERING

Horizontal: Turn

DELAY

to adjust thetriggershorizontal position.

You can adjust the triggersposition from 0% to 100% pre-trigger, from left to right on the grid. D E L A Y can

also beused for setting thepost-trigger, in time units, up to 10 000 divisions, in incrementsof 0.1 division.

T hetrigger location is shown bythe arrow at thegrid bottom, as

shown here at near right.

Post-trigger delayislabeled in the trigger delayf ield, where the

arrow becomeshorizontal, asshown here at far right.

Vertical: Turn

TRIGGER LEVEL

to adjust the triggersvertical threshold.

T urn thisknob to adjust thelevel of thetrigger source or the highlighted trace. L evel definesthesource voltage

at which thetrigger will generate an event a change in theinput signal that satisfi esthetrigger conditi ons.

A rrowson both sidesof the grid show thethreshold position. But these arrowsareonly

visible if the trigger source is displayed and the source signal D C coupled.


38/262



SET UPAN EDGE TRIGGER

1. PressTRI G G ER

SETUP

to accessthese menus:

U se them to select the trigger source, the sourcescoupling, the slope positive

or negative and theamount of trigger holdoff byti me or events.

1. Select Edge or SM A RT : Edge isselected bydefault.

TTIIPP:: Onceset,trigger level andcouplingpassunchangedfromtrigger typetotrigger typeforeachtriggersource.

2. Select thetrigger source. T hiscould bea signal on a channel, the

line voltage that powersthe Waverunner, or the E X T BN C

connector.

3. Select thecoupling for thetrigger source.

4. Place the trigger point on thepositive or negative slope of the

selected source, or choose to define a window.

When Windowisselected from theabovemenu, amenu appearshere that allowsyou to defi nethe

windowssize. Seepage 33.

T o hold off from triggeringfor a defined time, or

number of events, after a particular trigger event. U se

thisbutton to select Timeor Events, and the knob toset the value. Offdeactivatesthe holdoff. See Chapter 8,

T ri gger Smart.

5. Turn

DELAY

to adjust the triggershorizontal position, and the amount of pre-trigger, asdesired.

6. Turn

TRIGGER LEVEL

to adjust thetrigger voltage level.


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TO DE T E R M I N E TRIGGER LE V E L , COUPLI NG AND SLOPE

Level defi nes t he sour ce vol t age at whi ch t he tr i gger ci r cui t wil l gener ate an event :a change in the input signal that satisfies the trigger conditions. The selected triggerl evel i s associ ated wi th t he chosen t r i gger sour ce.

Tr i gger l evel i s speci fi ed i n vol t s and nor mall y r emai ns unchanged when you change the ver ti cal gai n

or off set. The ampli t ude and r ange of the t ri gger level are l i mit ed as foll ows:

5 screen divisions with a channel as the trigger source

0.5 V wit h E X T as the tr igger source

5 V with E X T/ 10 as the tr igger source

N one wi t h L I N E as the t ri gger sour ce (zer o cr ossi ng i s used).

Coupling refers t o the type of signal coupli ng at the input of the tri gger ci rcuit . A s wit h thet r i gger l evel , you can sel ect t he coupli ng i ndependent l y f or each sour ce. Change t he tr i gger source andyou can change the coupli ng. You can choose fr om t hese coupli ng t ypes:

D C: A ll t he si gnal' s fr equency components ar e coupled t o the tr i gger ci r cui t for hi gh f r equencybursts or wher e the use of A C coupli ng woul d shif t t he eff ect i ve t r i gger l evel .

A C: T he si gnal i s capaci ti vel y coupled, D Cl evel s ar e r ej ect ed and fr equencies bel ow 50 H zattenuated.

L F RE J: The si gnal i s coupled t hr ough acapaci ti ve high-pass fi l ter network , D C i s r ejectedand signal fr equenci es bel ow 5 0 k H z ar e att enuated.For st able tr i ggeri ng on medi um t o hi gh fr equencysi gnal s.

H F RE J: Signals ar e D C coupled to the tr iggerci rcuit , and a l ow-pass fi lt er network att enuatesfr equenci es above 50 k H z; used f or tr i gger i ng on l ow

fr equencies.

H F: U se onl y when needed for tr i gger i ng onhigh-frequency repetitive signals. H F isautomatically overridden and set to A C whenincompatible with trigger characteristics such as thoseof SM A RT Tr igger.

Slopedet er mines the dir ect i on of the tr i gger vol t agetransition used for generating a particular triggerevent . You can choose a posi t i ve or negat i ve sl ope.L i k e coupli ng, t he sel ected sl ope i s associ ated wit hthe chosen t r i gger sour ce.

Triggerlevel

PositiveSlo

pe

Trigger

F i gur e 1. E dge tr i gger wor k s on t he sel ect ededge at t he chosen l evel . T he sl ope posi t i veher e i s hi ghli ghted on the t ri gger i con.


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TO RE-ARM A TRIGGER

Thr ee tri gger re-arming modes A UT O, N ORM A L , and SI N GL E areavail able for al l types of tr iggers. I n addi ti on, ST OP cancel s the capture in allt hr ee modes.

Pr ess

AUTO

to acti vat e A U T O mode: the tr ace wi ll automat i call y be di splayed i f no tr i gger occurssoon after. But i f a signal does occur, Waver unner behaves as i f i n N ORM A L mode.

Pr ess

NORMAL

to enter N ORM A L mode and conti nuously update the display whil e ther e is a val i d

tr igger. I f there i s no vali d t ri gger, the last signal is r etained and t he warni ng SL OW

TR I GG E R i s displayed i n t he tr igger status field.

Pr ess

SINGLE

to enter SI N GL E mode: the Waver unner wil l wait for a single t ri gger to occur, then

display t he si gnal and st op captur i ng. I f no tr i gger occurs, you can press thi s button again t o

manually trigger the scope.

Pr ess

STOP

to halt the captur e made in A UT O, N ORM A L or SIN GL E r e-arming modes. Press

ST OP t o prevent captur e of a new si gnal, or whi l e a singl e-shot captur e i s under way t o k eep t he

last captured signal.

TO RECOGNIZE TRIGGER ICONS

Tr i gger i cons all ow i mmediat e on-scr een r ecogni t i on of the cur r ent t ri gger condit i ons. T her e i s ani con for each tr i gger. T he mor e heavil y mark ed tr ansi ti ons on t he icon i ndicate t he sl ope on which t hetrigger will be generated. The icons are annotated with information on the trigger settings.

T hi s icon, for ex ampl e, r epresent s an E dge tr i gger set up t o tr i gger on t he posi t i ve sl ope, at a l evel of 0.008 V , with a holdoff ti me of 50 ns.


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USE WINDOWTRIGGER

D efi nea region whose boundariesextend above and below the selected trigger level. A trigger event will occur

when thesignal leavesthiswindow region in either direction and passesinto theupper or lower region (Fig. 2).

T henext trigger will occur when the signal again passesinto thewindow region.

1. Select .

2. T hen use to defi ne the si ze of the wi ndow regi on.

A bar at theleft-hand side of thegrid will visually indicate thewindowsheight.

WINDOWREGION

Trigger Level

Triggers

Time

Lower R egion

U pper R egion

Fi gure 2. W i ndow Tr i gger : t ri ggers when the si gnal leaves t he wi ndow r egi on. The ar r ows indi catewher e tr i gger s occur when t he si gnal l eaves t he window r egi on.


42/262



TRIGGER SOURCET he trigger source may be one of the following:

T he acquisition channel signal (C H 1, CH 2, CH 3 or CH 4) conditioned f or the overall voltage gain,

coupling, and bandwidth.

T he line voltage that powers the oscilloscope (L I N E ). T his can be used to provide a stable display of

signalssynchronouswith the power line. Coupling and level arenot relevant for this selection.

T he signal applied to the E X T BN C connector (E X T ). T hiscan be used to trigger theoscilloscope withina range of0.5V on EX T and 5 V with E X T / 10 asthetrigger source.

Level

L evel definesthesource voltage at which thetrigger circuit will generate an event (a change in theinput signal

that satisfi esthe trigger conditions). T he selected trigger level isassociated with the chosen trigger source. N ote

that thetrigger level i sspecif ied in voltsand normally remainsunchanged when thevertical gain or offset is

modified.

T heA mplitudeand R ange of the trigger level areli mited asf ollows:

5 screen divi sionswith a channel asthe trigger source

5 V with EX T / 10

none with L I N E asthe trigger source (zero crossingisused)

Note:Note:Note:Note:Oncespecified, Trigger Level andCouplingaretheonlyparametersthatpassunchanged fromtrigger modetotrigger modeforeachtrigger source.


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OBTAIN A TRIGGER STATUSSUMMARY

D isplay a summaryof the statusof your trigger, aswell astimebase, vertical sensitivity, probeattenuation, and

offset and coupling for each channel.

1. Press

SCOPE

STATUS

to show the ST A T U S menus.

2. Pressthe button to select Acquisition.

TTIIPP:: Press

PRINT

SCREEN

todocumentyourstatussummaryandmakeahardcopy.

Press

PANELS

whenyouhaveasettingyouwanttoreuse(seethenextchapter formoreonthis).

Pr ess the SCOP E STA T U S but t on for access to ful l -scr een summari es of your Waver unner s syst emst atus and other f unct i onal st atus.

SeeChapter 8, Trigger Smart,for moreaboutEdgetrigger andall abouttheSMART Trigger types.


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C H A P T E R T H R E E : DisplayYour Signal


To viewsignal changesover time

Tosetupthedisplay

To setupfor AnalogPersistence

Tochooseagrid style

To saveandrecall panel setups


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C H A P T E R T H R E E DisplayYourSignal

DisplayPersistence

You can use Waverunner colorsand toolsto display yoursignal on the screen.

V iew one, two, four, or eight gridsand up to eight traces

(depending on model) at thesame time. A djust display and

grid intensity. Choose from several grid styles. O r fi ll the

entire screen with your waveforms using Full Screen.

You can personalize your Waverunner display, while

managing color and screen intensity automatically. T he

displayed signal and all related information share identifying

colorschosen byyou. Show signalsand tracesopaquely or

transparently, so that overlapping objects tracesover

traces, tracesover grids are alwaysvisible.

O ther invaluable toolsand techniques, such astheA nalog Persistence feature, help you display your waveform

and reveal its idiosyncrasies.

TTIIPP:: Toclear your settingsand makeafreshstartonanewwaveform:

1. Connectthesignal tobemeasuredtoaWaverunnerchannel.

2. Simultaneouslypressthesecond andfifthmenubuttonsfromthetop, andtheCHANNEL SELECT 1button, torevert tothedefault settings.

3. Turnoff anyunwanted tracesbypressingA,B,C, or D.

4. PressSELECT 1, 2, 3, or 4for thesignals channel andchooseCoupling.Ensurethatthecoupling

matchesthecircuitsimpedance. If not,setit correctly usingthemenu button.

5. PressAUTO SETUP twice.

Thenfollowthestepsbelow.

VIEWSIGNAL CHANGESOVER TIME

U se Persistence to accumulateon-screen pointsfrom manyacquisitionsand see your signal change over time.

Waverunner persistence modesshow the most frequent signal path three-dimensionally in intensitiesof the

samecolor, or graded in a spectrum of colors.

To display your waveform with persistence:

1. Press

ANALOG

PERSIST

to display your signal with

A nalog Persistence or Color G raded persistence.

2. Press

DISPLAY

to display the D isplay Setup

menus.


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SET UP YOUR DISPLAY

3. U se thesemenusto set upyour display. When not using persistence, somemenusaredifferent, asindicated below.

T o select standard or X Y display: Standard isselected bydefault.

See Chapter 9, D i spl ay M or e, for X Y display.

T o turn persistence on or off. O r press

ANALOG

PERSIST

to togglei t on or off.

T o set up the persistence display (see next page). When Persistence is Off,this menu becomesD ot Join: when there are more than 400 sample

points on the screen, the points areconnected byline segments.

T o accessmore display setup menus. See Chapter 9, D i splay M or e.

T o select thegrid style and number. See page 40.

U sed with persistence to select the displayed trace for the

menu action below. When persistence isnot being used, this

menu iscalled Wform+Textand its knob adjustswaveform and text brightness.

TTIIPP:: At0%intensityin Standarddisplaywithoutpersistence, thewaveformandtextdisappear.

Press

DISPLAY

toreturn themtonormalbrightness.

U sed with persistence to select the percentageof

saturation: 100% spreadsthe spectrum acrossthe entire

depth of the persistence data map; at lower values, the

spectrum will saturate brightest color or shade at the

percentage valuespecified. L owering thispercentage causes

thepixelsto besaturated at a lower data intensity, and

makesvisible rarely hit pixelsnot seen at higherpercentages.

When persistence is not being used, this menu iscalled

G rid intensity; i tsk nob adjuststhe intensity of thegrid.

G ridscan be brightened, or blended with displayed traces

byreducing their intensity. A lso pressthis menu button to

return brightnessfrom 0% to thedefault level.


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C H A P T E R T H R E E : DisplayYourSignal


SET UPFOR PERSISTENCE

4. Pressthe button for Persistence Setup to accessthese menus.

5. U se them to set up your persistence display.

T o display (On) the last trace captured.

T o select thepersistence duration, in seconds. I f thiswere to be set at

1 s, for example, each captured trace would bedisplayed for one

second and then deleted. T he number of sweepsi ncluded in the

display (up to one million) is indicated at thebottom of thedisplayed

trace label. T hedefault is selection is Infinite.

T o select persistence for all, or the top two labeled tracesdisplayed.

T his becomesuseful when four tracesor functionsare shown and

persistence will not beapplied to all of them.

T o select Analog, and render the persistence data mapsto the screenin intensiti esof thetrace color, or Color Graded, where themapsarerendered in a red-to-violet spectrum.

T o select thedisplayed trace for themenu action below.

T o select the percentage of saturation. See menu

explanation on thepreviouspage.

RETURN6. Pressto go back to themain display setup menus.

TTIIPP:: Press

CLEAR

SWEEPS

torestart thepersistenceaccumulationofpoints for example, when youchangethesignal sourceandwanttoclear theprevioustrace.

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LeCroy Waverunner 1 LT Series Owners Manual

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