Tektronix 2445B User manual

Tektronix
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2445B/2455B/2465B
OscilloscopeandOptions
OperatorManual
070-6860-00
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Tektronix
/
2445B/2455B/2465B
OscilloscopeandOptions
OperatorManual
070-6860-00
Pleasecheckforchangeinformationattherear
of this manual.
FirstPrinting:May1988
RevisedPrinting:October1990

InstrumentSerialNumbers
EachinstrumentmanufacturedbyTektronixhasa serialnumberona panel
insertortag,orstampedonthechassis.Thefirstletterintheserialnumber
designatesthecountryofmanufacture.Thelastfivedigitsoftheserialnumber
areassignedsequentiallyandareuniquetoeachinstrument.Those
manufacturedintheUnitedStateshavesixuniquedigits.Thecountryof
manufactureisidentifiedasfollows:
B010000Tektronix,Inc.,Beaverton,Oregon,USA
E200000TektronixUnitedKingdom,Ltd.,London
J300000Sony/Tektronix,Japan
H700000TektronixHolland,NV,Heerenveen,TheNetherlands
InstrumentsmanufacturedforTektronixbyexternalvendorsoutsidetheUnited
Statesareassigneda twodigitalphacodetoidentifythecountryofmanufacture
(e.g., JPforJapan,HKforHongKong,ILforIsrael,etc.).
Tektronix,Inc.,P.O.Box500,Beaverton,OR97077
Printedin U.S.A.
Copyright ■!■ Tektronix,Inc.,1988

WARRANTY
Tektronixwarrantsthatthisproductwillbefreefromdefectsinmaterialsand
workmanshipforaperiodof three (3)yearsfromthedateofshipment.Ifanysuch
productprovesdefectiveduringthiswarranty period, Tektronix,atits option, either
willrepairthedefectiveproductwithoutchargeforpartsand labor, or wiii providea
replacementinexchangeforthedefectiveproduct.
Inorder to obtainserviceunderthiswarranty,CustomermustnotifyTektronixofthe
defectbeforetheexpirationofthewarrantyperiodandmakesuitable
arrangementsfortheperformanceofservice.Customershallberesponsiblefor
packagingandshippingthedefectiveproducttotheservicecenterdesignatedby
Tektronix,withshippingchargesprepaid.Tektronixshallpayforthereturnofthe
producttoCustomerif the shipment is toalocationwithinthecountryinwhichthe
Tektronixservicecenterislocated.Customershallberesponsibleforpayingall
shippingcharges,duties,taxes,andanyotherchargesforproductsreturnedto
anyotherlocations.
Thiswarrantyshallnotapplytoanydefect,failureordamagecausedbyimproper
useorimproperorinadequatemaintenanceandcare.Tektronixshallnotbe
obligatedtofurnishserviceunderthiswarranty a) torepairdamageresultingfrom
attemptsbypersonnelotherthanTektronixrepresentativestoinstall,repairor
servicetheproduct;b)torepairdamageresultingfromimproperuseorconnection
toincompatibleequipment;orc)toservicea productthathasbeenmodifiedor
integratedwithotherproductswhentheeffectofsuchmodificationorintegration
increasesthetimeordifficultyofservicingtheproduct.
THISWARRANTYISGIVENBYTEKTRONIXWITHRESPECTTOTHIS
PRODUCTINLIEUOFANYOTHERWARRANTIES,EXPRESSEDOR
IMPLIED.TEKTRONIXANDITSVENDORSDISCLAIMANYIMPLIED
WARRANTIESOFMERCHANTABILITYORFITNESSFORA PARTICULAR
PURPOSE.TEKTRONIX'RESPONSIBILITYTOREPAIRORREPLACE
DEFECTIVEPRODUCTSISTHESOLEANDEXCLUSIVEREMEDYPROVIDED
TOTHECUSTOMERFORBREACHOFTHISWARRANTYTEKTRONIXAND
ITSVENDORSWILLNOTBELIABLEFORANYINDIRECT,SPECIAL,
INCIDENTAL,ORCONSEQUENTIALDAMAGESIRRESPECTIVEOF
WHETHERTEKTRONIXORTHEVENDORHASADVANCENOTICEOFTHE
POSSIBILITY OF SUCHDAMAGES.

CertificateoftheManufacturer^lmporter
Weherebycertifythatthe.
2465B/2455B/2445BOSCILLOSCOPEANDALLINSTALLEDOPTIONS
complieswiththeRFInterferenceSuppressionrequirementsof
Amtsbl.-Vfg1046/1984.
TheGermanPostalServicewasnotifiedthattheequipmentisbeing
marketed.
TheGermanPostalServicehastherighttore-testtheseriesandto
verifythatitcomplies.
TEKTRONIX
BescheinigungdesHerstellers/lmporteurs
Hiermitwirdbescheinigt,da#der/die/das
2465B/2455B/2445BOSCILLOSCOPEANDALLINSTALLEDOPTIONS
inUbereinstimmungmitdenBestimmungenderAmtsblatt-Verfugung
1046/1984funkentstoYtist.
DerDeutschenBundespostwurdedasInverkehrbringendiesesGerates
angezeigtunddieBerechtigungzurUberprufungderSerieaufEinhalten
derBestimmungeneingeraumt.
TEKTRONIX

NOTICEtotheuser/operator:
TheGermanPostalServicerequiresthatSystemsassembledbythe
operator/userofthisinstrumentmustalsocomplywithPostal
Regulation,Vfg.1046/1984,Par.2,Sect.1.
HINWEISfurdenBenutzer/Betreiber:
DievomBetreiberzusammengestellteAnlage,innerhalbdererdies
Gerateingesetzt wird, mu/3 ebenfallsdenVoraussetzungennachPar.2,
Ziff. 1 derVfg.1046/1984genugen.
NOTICEtotheuser/operator:
TheGermanPostalServicerequiresthatthisequipment,whenusedina
testsetup,mayonlybeoperatediftherequirementsofPostal
Regulation,Vfg.1046/1984,Par.2,Sect.1.7.1arecomplied with.
HINWEISfurdenBenutzer/Betreiber:
DiesGeratdarfinMeflaufbautennurbetriebenwerden,wenndie
VoraussetzungendesPar.2, Ziff. 1.7.1derVfg.1046/1984eingehalten
werden.

The 2465B, 2455B, and 2445B
TheTEKTRONIX2465B,2455B,and2445Bportableoscilloscopeshavefourvertical
channelswithDCto400MHz,250MHz,and150MHzbandwidths.Deflectionfactors
runfrom2 mVto5 V perdivision,ina 1-2-5sequence,witheither1 MHor50Cl input
resistance,inchannels1 and2.EitherACorDCinputcouplingisavailableat 1 MfL
Channels3 and4 give0.1V or0.5V perdivision,with1 MHinputresistance,andDC
coupling. Withthestandard10Xprobes,channels1 and2 display20mVto50
V/divisionandchannels3 and4 display 1 V or5 V/division.
Thetriggersystemworksautomaticallyformostsignals.Theyoperateinvarious
modes,fromanychannel,withoptimumcouplingsfora widerangeofsignals.The
2445BtriggersfromDCto250MHz.The2455Band2465BtriggerfromDCto
500 MHz.
Sweepspeedsrangefrom1.5s to1 nsperdivisiononthe2445Band2455Bandto
500psperdivisiononthe2465B,includingtheeffectsoftheX10magnifierandthe
calibratedvariablebetween1-2-5steps.HorizontaldisplaysincludeA-Sweep,
B-Sweep(delayed),A alternatedwithB,andCH1 (forX/Ydisplays).
TheSETUPfeatures.AUTO,SAVE,andRECALL,savetimeandpreventerrors.
whetheryouarea noviceoperatorora master.AUTOSetupworkswithalmostany
signal. Forrepeatingmeasurements,theSaveandRecallfunctionsrecordandrestore
asmanyas30instrumentsetups,includingtheextended-functionoptions.Setupscan
berecalledeitherimmediatelyorsequentially.
Digitalreadoutsoftime,voltage,scalefactors,triggerlevels,andauxiliaryinformation
alsosavetimeandreduceerrors.
WithParametricMeasurements,commonmeasurementssuchasfrequency,period,
amplitude,pulsewidth,dutyfactor,risetime,falltime,andpropagationdelaycanbe
madeautomatically.EachmeasurementactivationdisplaystheresultsintheCRT
readout.Measurementresultsremainon-screenuntilanyotherbuttonispressed.
ForinstrumentswithserialnumbersB049999andbelowwithfirmwareVersion
11andaboveorforinstrumentsserialnumbersB050000andabovewithfirmware
Version2 andabovethefollowingfunctionisavailable.TheRECALLbuttonresets
theinstrumentintothemodeofoperationitwasinpriortoperformingtheparametric
measurementorAUTOSetup.
WiththeavailableCounter/Timer/Trigger(CTT),Option06orOption09,
measurementsrequireevenlesseffortandgivebetteraccuracy.TheCTT increases
triggerselectivity,especiallyindigitalsystems.Option09includestheCTTanda 17-bit
WordRecognizer {WR). TheavailableTelevisionA/ideo(TV)enhancement,Option05,can
triggeratanydesiredpointina frameanditcanreducetheeffectsofaccouplingand
humina videosignal.TheavailableDigitalMultimeter(DMM)measuresdcvoltage,dc
current,acrmscurrent,resistance,andtemperaturewithfloatinginputs.
2465B/2455B/2445BOperators

The 2465B, 2455B, and 2445B
The WR addsa WordRecognizerProbeconnectorontherearpanel.The TV
enhancementaddsLINES,FLD1,andFLD2TriggerCoupling.
TheavailableGPIBinterfaceaccessesallcontrolsanddigitalreadings.Theinterface
addsGPIBstatusindicators,justabovetheCRT.Seethe24X5B/2467B GPIB (Option 10)
Instrument Interfacing Guide forinformationonintegratingtheinstrumentinto a GPIB
system.
The2465BCTincludesC7TandWR (Option9)andGPIB(Option10).The
2465BDMaddsDMM (Option01)andalsoincludesCTT andWR(Option9)andGPIB
(Option10).The2465BDVaddsTV(Option05)tothefeaturesofthe2465BDM.
Illustrationsatthebackofthemanualshowtheinstrumentfrontandrearpanels.
2465B/2455B/2445BOperators

Page
Prefacei
Illustrationsvi
Tablesvii
OperatorsSafetySummaryviii
"jGenera! Information
PreparationforUse1-1
Safety1-1
LineVoltageSelection1-1
LineFuse1-1
PowerCord1-3
InstrumentCooling1-4
Start-up1-4
RepackagingForShipment1-5
2Operation
Fundamentals2-1
ParametricMeasurements2-1
Gettinga Display2-2
AssigningParametricMeasurementstoAutoSetup2-3
Vertical2-4
Horizontal2-6
TriggerControls2-6
VideoTriggering2-9
Readout2-10
MeasurementswithCursors2-13
VoltageMeasurements2-15
DisplayOperation2-15
SignalConnections2-16
MagnifyWaveformDetailswithDelayed-Sweep2-17
B-Trigger Operation2-18
Delta-Delay-Time2-19
Single-Delay-TimeMeasurements2-20
TimeIntervalMeasurement2-21
PrecisionTiming2-22
TriggeredDelta-Delay-TimeMeasurements2-23
TimeIntervalResolution2-25
MeasurementUpdating2-25
Frequency,Period,andTotalizeCounting2-27
FrequencyMeasurementwithExternalReference(Option1E)2-28
DelaySweepsbyEventCounts2-28
LogicTriggering2-32
WordRecognizerOperation2-34
TheWordOutSignal2-35
FrequencyLimitforAutoLevelorParametricMeasurements2-35
DMM\ 2-35
SaveandRecallOperation2-36
2465B/2455B/2445BOperatorsiii

Contents
3Applications
Peak-to-PeakVoltage3-1
AbsoluteVoltagesUsingCursors3-1
NoiseImmunity3-2
DCVoltageMeasurement3-3
AmplitudeModulation3-3
FrequencyModulation3-4
MeasuringVideoSignalsinIREUnits3-5
AvoidingFalseDisplayswithMulti-ModeSignals3-5
AlgebraicAdditiontoDetectCoincidenceorCancelInterference3-5
ObservingCoincidenceofDigitalSignals3-6
MeasuringOff-GroundSignalsAndCancellingInterference3-6
PeriodandFrequency3-8
RiseTimeandFallTime3-9
PropagationDelay3-11
SetupandHoldTimes3-12
SlewRate3-13
TimeRatio(DutyFactor)3-13
PhaseDifferenceBetweenTwoSignals3-15
MeasuringMillivoltSignals3-17
4Checks and Adjustments
Introduction4-1
InitialSetup4-1
TraceRotationandAdjustment4-2
AstigmatismAdjustment4-2
AutoDCBalanceRoutine4-3
ProbeCompensation4-4
MatchingChannel2 Delay4-5
AmplitudeCheck4-6
TimingCheck4-7
QControls, Connectors, and Indicators
Introduction5-1
PowerAndDisplay5-1
SetupandVertical5-4
Horizontal5-12
DelayandDeltaControls5-15
RearPanel5-27
DMM5-29
DMMDisplays5-33
Display-ModeInteractions5-33
iv2465B/2455B/2445BOperators

Q Performance Characteristics
PerformanceConditions6-1
"J Options and Accessories
Introduction7-1
Option117-1
Option1R7-1
PowerCordOptions7-2
StandardAccessories7-3
OptionalAccessories7-5
f^ Appendix A
ExtendedFunctionswithDiagnosticExercisersA-1
3 Appendix B
SequenceProgrammingandOperationB-1
ExecutingSequencesB-3
Q Appendix C
PowerUpTestsC-1
KernelTestC-1
ConfidenceTestsC-1
Q Appendix D
Delta-TimeandDelta-Delay-TimeAccuracyunderNoted
ConditionsfortheC/T/TOptionD-1
Delay-TimeAccuracyunderNotedConditionsforthe
C/T/TOptionD-2
2465B/2455B/24-45BOperators

Contents
Illustrations
Figure Page
1-1Lineselectorswitch,linefuse,anddetachablepowercord1-3
2-1Readoutdisplaylocations2-11
3-1Instantaneousvoltages3-2
3-2Eliminatingcommon-modesignals3-7
3-3Measuringrisetimes3-10
3-4Timebetweentwopulses(cursormethod)3-12
3-5Timeratio(dutyfactor)3-14
3-6Phasedifferencebetweentwosignals3-16
3-7Small-anglephasedifference3-16
4-1Probelow-frequencycompensation4-4
5-1Poweranddisplaycontrols5-3
5-2SETUPandMODEbuttons,andCH1 andCH2 POSITIONcontrols5-7
5-3Channel1 andChannel2 controlsandconnectors5-8
5-4CH3 andCH4 controlsandconnectorsandCALIBRATORoutput5-11
5-5Horizontalanddeltameasurementcontrols5-19
5-6Triggercontrolsandindicators5-26
5-7Rearpanelcontrolsandconnectors5-28
5-8DMMcontrolsandconnectors5-32
6-1Dimensionaldrawing6-39
VI 2465B/2455B/2445BOperators

Contents
Tables
Table Page
1-1PowerCordandVoltageData1-2
2-1ResolutionSelections2-26
2-2AutoResolution2-26
2-3Delay-by-EventsCombinations2-29
2-4SweepTriggering2-33
6-12465A/2455A/2445AElectricalCharacteristics6-2
6-2Option01(DMM)ElectricalCharacteristics6-19
6-3Option05(TV)ElectricalCharacteristics6-26
6-4Option06(C/T/T)ElectricalCharacteristics6-29
6-5Option09(WR)ElectricalCharacteristics6-35
6-6Option10(GPIB)ElectricalCharacteristics6-37
6-7MechanicalCharacteristics6-38
6-8EnvironmentalRequirements6-40
C-1ConfidenceTestNumbersandAffectedFunctionsC-2
2465B/2455B/2445BOperatorsvii

Operators Safety Summary
OperatorsSafety Summary
The general safety information in this part of thesummary is for both operating
and servicing personnel. Specific warnings and cautions will be found
throughout the manual where they apply anddonot appear in this summary.
Terms
In This Manual
CAUTIONstatementsidentifyconditionsorpracticesthatcouldresultin
damagetotheequipmentorotherproperty.
WARNINGstatementsidentifyconditionsorpracticesthatcouldresultin
personalinjuryorlossoflife.
As Marked on Equipment
CAUTIONindicatesapersonalinjuryhazardnotimmediatelyaccessibleasone
readsthemarkings,ora hazardtoproperty,includingtheequipment itself.
DANGERindicatesa personalinjuryhazardimmediatelyaccessibleasone
readsthemarking.
Symbols
In This Manual
A
Thissymbolindicateswhereapplicablecautionaryorother
informationistobefound.FormaximuminputvoltageseeTable6-1.
As Marked on Equipment
ff DANGER—Highvoltage.
A
Protectiveground(earth)terminal.
ATTENTION—Refertomanual.
vin 2465B/2455B/2445BOperators

Operators Safety Summary
Power Source
Thisproductisintendedtooperatefroma powersourcethatdoesnotapplymore
than250voltsrmsbetweenthesupplyconductorsorbetweeneithersupply
conductorandground.A protectivegroundconnectionbywayofthegrounding
conductorinthepowercordisessentialforsafeoperation.
Grounding the Product
Thisproductisgroundedthroughthegroundingconductorofthepower cord. To
avoidelectricalshock,plugthepowercordintoa properlywiredreceptaclebefore
connectingtotheproductinputoroutputterminals.A protectiveground
connectionbywayofthegroundingconductorinthepowercordisessentialfor
safeoperation.
Danger Arising From Loss of Ground
Uponlossoftheprotective-groundconnection,allaccessibleconductiveparts
(includingknobsandcontrolsthatmayappeartobeinsulating)canrenderan
electricshock.
Use the Proper Power Cord
Useonlythepowercordandconnectorspecifiedforyourproduct.
Useonlya powercordthatisingoodcondition.
FordetailedinformationonpowercordsandconnectorsseeTable1-1.
Use the Proper Fuse
Toavoidfirehazard,useonlya fuseofthecorrecttype,voltageratingandcurrent
ratingasspecifiedinthepartslistforyourproduct.
DoNot Operate in Explosive Atmospheres
Toavoidexplosion,donotoperatethisproductinanexplosiveatmosphereunless
ithasbeenspecificallycertifiedforsuchoperation.
DoNot Remove Covers or Panels
Toavoidpersonalinjury,donotremovetheproductcoversorpanels.Donot
operatetheproductwithoutthecoversandpanelsproperlyinstalled.
2465B/2455B/2445BOperators IX

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6860-11

CAUTION
TOAVOIDELECTRICSHOCk THE POWERCORD
PROTECTIVEGROUNDINGCONDUCTORMUST 8E
CONNECTED TO GROUND
00 NOT REMOVECOVERS.RtfERSERVICING TO
QUALIFIEDPERSONNEL.
DISCONNECTINPUTPOWERDtfOREREPLACINGfUSfc.
KIRCONTINUEDTIRiPROTECTIONREPLACE,ONLY
WITHSPECIFIEDTYPE ANO RAT EllFUSE.
UNEVOUAGE
SELECTION
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||Ejifri~f~li~|ryilkiiuiwninrvnmniivrri
ManualPartNo.070-6860-00FirstPrintingMAY1988
Prnrinct-2445B/2455B/2465BOperatorsRevisedOCT1990
ManualInsertStatus
DateChangeRefersnc©Ststu
JUL90M73008Effective
r«M»%•W
Pagelof1

• * * K •■ ■ « »
MANUALUMANUtINhUHMAI IUN
COLMTTED TO BCH1EN3E
leKtronix
Date: 07-05-90ChangeReference:M73006
Product:2465B/2455B/2445BOperatorsManualPartNumber:070-6860-00
DESCRIPTIONProductGroup38
EFFECTIVESERIALNUMBERS:2445BB0600000
PAGE!
Changethefirstandsecondparagraphsto:
TheTEKTRONIX 2465B,2455B, and2445Bportableoscilloscopeshavefour
verticalchannelswithDCto400 MHz, 250 MHz, and200MHzbandwldths...
Thetriggersystemsworkautomaticallyformost signals. Theyoperate In various
modes, fromany channel, withcouplingsforawiderangeof signals. The2445B
triggersfrom DC to300 MHz. The2455Band2465Btrigger from DCto500MHz.
PAGE 6-3,6-5, and6-6
Changethe2445BVerticalDeflectionSystem—Channel 1 and
Channel2,andVerticalDeflectionSystem—Channel3 and
Channel4 specificationsto:
-3dBBandwidth
2445B
+15°Cto+35°CDCto200MHz.a
—15°Cto+15°CandDCto175MHz.
+35°Cto+55°C
-4.7dBBandwidth
2445B
+15°Cto+35°CDCto200MHz.a
—15°Cto+15°CandDCto175MHz.
+35°Cto+55°C
StepResponseRiseTime
2445B
Page 1 of 2
<1.75ns.

Product:2465B/2455B/2445BOperDate:JJZ=G5=:9Ghange Reference: M73QQ9
PAGE6-7and6-8
Changethe2445BTriggeringspecificationsto:
MinimumP-PSignalAmplitudeforStableTriggeringfrom
Channel 1 or Channel 2 Source
2445B
DC Coupled
NOISEREJCoupled
AC Coupled
LFREJ Coupled
Jitter
2445B
0.35divisionfromdcto50MHz;
increasingto1.0divisionat200MHz
and1.5divisionsat300MHz.
<1.2divisionsfromdcto 50 MHz;
increasingto3.0divisionsat200MHz
and4.5divisionsat 300 MHz.
0.35divisionfrom60Hzto 50 MHz;
increasingto1.0division at200 MHz
and1.5divisionsat 300 MHz. Attenu-
atessignalsbelow 60 Hz.
0.50divisionfrom80kHzto 50 MHz;
increasingto1.0divisionat200MHz
and1.5divisionsat300MHz.
<100pswith5 divisionsof200MHz
at 1 ns/division.
PAGE7-3
Changethe2445BStandardAccessoriesto:
2Probes(1OX,1,3m)withAccessories
PAGE7-5
Changethe2445BStandardAccessoriesto:
ProbePackage
P6137
P6137
Page2 of 2