Kenwood CS-1044 User manual

40MHzDUALTRACEOSCILLOSCOPE
CS-1044
20MHzDUALTRACEOSCILLOSCOPE
CS-1025
INSTRUCTIONMANUAL

SAFETY
SymbolinThisManualUsetheProperPowerCord
AThissymbolindicateswhereapplicablecautionaryorUseonlythepowercordandconnectorspecifiedforyour
otherinformationistobefound.product.
PowerSource
Thisequipmentoperatesfroma powersourcethatdoes
notapplymorethan250V rmsbetweenthesupplycon-
ductorsorbetweeneithersupplyconductorandground.
Aprotectivegroundconnectionbywayofthegrounding
conductorinthepowercordisessentialforsafeopera-
tion.
GroundingtheProduct
Thisequipmentisgroundedthroughthegroundingcon-
ductorofthepowercord.Toavoidelectricalshock,plug
thepowercordintoa properlywiredreceptaclebefore
connectingtotheequipmentinputoroutputterminals.
UsetheProperFuse
Toavoidfirehazard,usea fuseofthecorrecttype.
DonotOperateinExplosiveAtmospheres
Toavoidexplosion,donotoperatethisproductinanex-
plosiveatmosphere.
DonotRemoveCoverorPanel
Toavoidpersonalinjury,donotremovethecoverorpanel.
Referservicingtoqualifiedpersonnel.
VoltageConversion
Ifthepowersourceisnotappliedtoyourproduct,contact
yourdealer.Toavoidelectricalshock,donotperformthe
voltageconversion.
CONTENTS
SAFETY2
FEATURES3
SPECIFICATIONS4
PREPARATIONFORUSE7
CONTROLSANDINDICATORS9
FRONTPANEL9
REARPANEL13
OPERATION14
INITIALSTARTINGPROCEDURE14
(1)NORMALSWEEPDISPLAYOPERATION14
(2)MAGNIFIEDSWEEPOPERATION16
(3)X-YOPERATION16
(4)VIDEOSIGNALOBSERVATION16
(5)SINGLESWEEP16
APPLICATION17
PROBECOMPENSATION17
TRACEROTATIONCOMPENSATION17
DCVOLTAGEMEASUREMENTS17
MEASUREMENTSOFTHEVOLTAGE
BETWEENTWOPOINTSONA WAVEFORM18
ELIMINATIONOFUNDESIREDSIGNAL
COMPONENTS18
TIMEMEASUREMENTS19
FREQUENCYMEASUREMENTS19
PULSEWIDTHMEASUREMENTS20
PULSERISETIMEANDFALLTIME
MEASUREMENTS20
TIMEDIFFERENCEMEASUREMENTS21
PHASEDIFFERENCEMEASUREMENTS22
RELATIVEMEASUREMENTS22
APPUCATIONOFX-YOPERATION24
MAINTENANCE26
ACCESSORIES27
Note:Tinsinstructionmanualisdescribedfortwomodels.
Refertoitemappliedtoyourproduct.
2

FEATURES
•Verticalaxishashighsensitivityandwidebandwidth
andespeciallycoversfullyspecifiedfrequencyresponse
at5mV/div.
CS-1044:40MHz(-3dB)[1mV,2 mV:15MHz
(-3dB)]
CS-1025:20MHz(-3dB)[1mV,2 mV:10MHz
(-3dB)]
•Holdoffcontrolpermitstriggeringofsignalsofintricate
timerelations(fortheCS-1044only).
•Single-sweepfunctionallowsobservationoftransient
andsingle-shotsignals(fortheCS-1044only).
•Sincesignaldelaylineisincorporated,theleadingedge
ofhigh-speedsignalscanbeobserved(fortheCS-1044
only).
•Triggercoupling(HFREJ)assurestriggeringofsignals
containinghigh-frequencynoise(fortheCS-1044only).
•Verticalsensitivityrangeisselectablefrom 1 mV/divto
5V/divwithrotaryswitchcontinuously.
•Timebasepermitshighsweepspeed.
20nsec/div(x10MAG)
•Verticalsensitivityerrorandsweeprateerrorare±3%
andaccuratemeasurementsareprovided.
•The150mmrectangularCRTwithinternalgraticule
provideshighbrightnessandaccuratemeasurements,
freeofparallaxerror:domedmeshtypeCRTwithpost-
deflectionaccelerationandhighbrightnessphosphors
(accelerationvoltage;6 kV).
•Forconvenienceinmakingrisetimemeasurements,the
0%,10%,90%and100%levelsaremarkedonthe
graticulescaleoftheCRT.
•Tracerotationiselectricallyadjustablefromthefront
panel.
•BySCALEILLUMcontrol,thewaveformiseasyobserv-
edinthedarkandthephotographofthewaveformis
easyprovided.
•SelectableAUTOFREERUNfunctionprovidessweep
withouttriggerinputsignal.
•TheFRAME-LINEswitchprovidesselectionofsync
pulseforsweeptriggeringfromsmallamplitudetolarge
amplitudewithoutadjustingwhenviewingcomposite
videowaveforms.
•Verticalmodeautomaticallyprovidesthetriggersignal
withTRIGSOURCEandVERTMODEswitches.
•X-Yoperationiseasilyprovidedbyone-touchebutton
operation.
CH1Yaxis,
CH2X axis
•CH1OUTPUTterminalareprovidedtomonitorinput
signalofCH1.
3

SPECIFICATIONS
CS-1044 CS-1025
CRT 150STM31
Rectangular,withinternalgraticule 150QTM31
Rectangular,withinternalgraticule
AccelerationVoltage 6kV
DisplayArea 8x10div(1div= 10mm)
VERTICALAXIS CH1andCH2
Sensitivity 1mV/divto5 V/div,±3%
Attenuator 12steps,1 mV/divto5 V/divin1-2-5sequence.
Verniercontrolforfullyadjustablesensitivitybetweensteps.
InputImpedance 1Mfi±2%approx.20pF 1Mfi±2%approx.22pF
FrequencyResponse
5mV/divto5V/div
DC; DCto40MHz,-3dB
AC; 5 Hzto40MHz,-3dB
DC; DCto20MHz,-3dB
AC; 5 Hzto20MHz,-3dB
1mV/div,2 mV/div
DC; DCto 1 5 MHz,-3dB
AC; 5 Hzto 1 5 MHz,-3dB
DC; DCto10MHz,-3dB
AC; 5 Hzto10MHz,-3dB
RiseTime 8.8nsecorless(40MHz)
23.4nsecorless(15 MHz) 17.5nsecorless(20MHz)
35nsecorless(10MHz)
SignalDelayTime Approx.20nsecontheCRTscreen —
Crosstalk
— 40dBminimum
OperatingModes
CH1; singletrace
CH2; singletrace
ALT;twowaveformsalternating
CHOP;twowaveformschopped
ADD; CH1+ CH2addeddisplay
ChopFrequency Approx.250kHz
ChannelPolarity Normalorinverted,channel2 onlyinverted
/^MaximumInputvoltage 500Vp-por250V (DC+ ACpeak)
HORIZONTALAXIS InputthruCH2,x 10MAGnotincluded
OperatingModes WithtrigMODEswitch,X-Yoperationisselectable
CH1; Y axis
CH2; X axis
Sensitivity Sameasverticalaxis(CH2)
InputImpedance Sameasverticalaxis(CH2)
FrequencyResponse
DC; DCto1 MHz,-3dB
AC; 5 Hzto1 MHz,-3dB
DC; DCto500kHz,-3dB
AC; 5 Hzto500kHz,-3dB
X-YPhaseDifference 3°orlessat100kHz 3°orlessat50kHz
ft\ MaximumInputVoltage Sameasverticalaxis(CH2)
SWEEP
TypeNORM
AUTO
SINGLE-RESET
Triggeringsweep
TypeNORM
AUTO
SINGLE-RESET Sweepfreerunsinabsenceoftrigger
TypeNORM
AUTO
SINGLE-RESET Singlesweep —
4

CS-1044 CS-1025
SweepTime 0.2
/is/div to0.5s/div,±3%,in22
ranges,in 1 -2-5sequence.
Verniercontrolprovidesfullyadjustable
sweeptimebetweensteps.
SweepMagnification x10(tentimes)±5%(±8%on,0.2
/is/div range)
Linearity
±3% allranges,
±5% on0.2/As/divatx 10MAG.
Holdoff ContinuouslyvariablefromNORMto
overx 10withHOLDOFFcontrol —
TRIGGERING
InternalSync VERT
MODE; TriggeredbyinputsignalselectedbyverticalMODEset-
ting.
CH1; TriggeredbyCH1signal
CH2; TriggeredbyCH2signal
LINE; Triggeredbylinefrequency
ExternalSync EXT;TriggeredbysignalappliedtoEXTTRIGINPUTjack
ExternalSyncInputImpedance Approx.1 MQ,approx.25pF Approx.1 MQ,approx.30pF
ft\ Max.ExternalTriggerVoltage 50V (DC+ ACpeak)
Coupling
AC, HFrej,TVFRAME,TVLINE AC, TVFRAME,TVLINE
Triggersensitivity (withNORM)
AUTOFreq.range50Hzto20MHz
INT1 div
EXT0.1Vp-p
Triggersensitivity
ACFreq.range10Hzto40MHz
INT1 div
EXT0.1Vp-p
AUTOFreq.range50Hzto20MHz
INT1 div
EXT0.1Vp-p
Triggersensitivity
HFMinimumamplitude(Voltage)re-
quiredfortriggeringisincreased
attriggerfrequenciesbelow
10Hzorover20kHz.
NORMFreq.range10Hzto20MHz
INT1 div
EXT0.1Vp-p
Triggersensitivity
TVFRAME,LINE
INT1 div
EXT0.1Vp-p
TVFRAME,LINE
INT1 div
EXT0.1Vp-p
Triggersensitivity
(AUTO)Ratingshownaboveisprovidedat
50Hzorover.
TVFRAME,LINE
INT1 div
EXT0.1Vp-p
CALIBRATIONVOLTAGE 1V ±3%,squarewave,positivepolarity,approx.1 kHz
INTENSITYMODULATION
Sensitivity + 5 V,positivevoltagedecreasesbrightness.
InputImpedance Approx.10kQ
UsableFrequencyRange DCto2 MHz
/\MaximumInputVoltage 50V (DC+ ACpeak)
VERTICALAXISSIGNALOUTPUT CH1SIGNALOUTPUT
OutputVoltage Approx.50mV/divinto500
OutputImpedance Approx.500
FrequencyResponse
5mV/divto5 V/div 100Hzto40MHz,-3dBinto500 100Hzto20MHz,-3dBinto50«
1mV/div,2 mV/div 100Hzto
1 5 MHz,-3dBinto50fi 100Hzto10MHz,-3dBinto500
TRACEROTATION
Electrical, adjustablefromfrontpanel
5

CS-1044 CS-1025
POWERREQUIREMENT
LineVoltage 100V/120V/220V/240VAC±10%
LineFrequency 50/60Hz
PowerConsumption Approx.36W Approx.35W
DIMENSIONS(WxHxD) 319(341)x 132(145)x 380(442)mm
() dimensionsincludeprotrusionfrombasicoutlinedimensions
WEIGHT Approx.8.0kg Approx.7.8kg
ENVIRONMENTAL
WithinSpecifications 10°Cto35°C,85%max.relativehumidity
FullOperation 0°Cto40°C,85%max.relativehumidity
ACCESSORIESSUPPLIED
Probe PC-30x2
ReplacementFuse 0.8Ax2
0.5Ax2 0.5Ax2
0.3Ax2
InstructionManual 1
*Circuitandratingaresubjecttochangewithoutnoticeduetodevelopmentsintechnology.
6

PREPARATIONFORUSE
SAFETY
Beforeconnectingtheinstrumenttothepowersource,
carefullyreadthefollowinginformation,thenverifythat
thepowercordandpowerlinefuseareonesforyourpower
line.
Theinstrument'srearpanelhasa fuseholderontheleftof
theACinletterminal(thefuseholderalsoservesasa
voltageselector).Thevalueunderthetriangle• marked
ontheholderindicatesthelinevoltagesetfortheinstru-
ment.Ifthepowercordisnotappliedwiththecorrect
voltage,thereisa dangerfromelectricshock.
Linevoltage
Thisinstrumentoperatesusingac-powerinputvoltages
that100/120/220/240V atfrequenciesfrom50Hzto
60Hz.
Powercord
Thegroundwireofthe3-wireacpowerplugplacesthe
chassisandhousingoftheoscilloscopeatearthground.Do
notattempttodefeatthegroundwireconnectionorfloat
theoscilloscope;todosomayposea greatsafetyhazard.
Theappropriatepowercordissuppliedbyanoptionthatis
specifiedwhentheinstrumentisordered.
TheoptionalpowercordsareshownasfollowsinFig.1.
Linefuse
Thefuseholderislocatedontherearpanelandcontains
thelinefuse.Verifythattheproperfuseisinstalledby
replacingthelinefuse.
EQUIPMENTPROTECTION
1. Neverallowa smallspotofhighbrilliancetoremainsta-
tionaryonthescreenformorethana fewseconds.The
screenmaybecomepermanentlyburned.A spotwilloc-
curonlywhenthescopeissetupforX-Yoperationand
nosignalisapplied.Eitherreducetheintensitysothe
spotisbarelyvisible,switchbacktonormalsweep
operationwhennosignalisapplied,orsetupthescope
forspotblanking.
2. Nevercovertheventilatingholesonthetopofthe
oscilloscope,asthiswillincreasetheoperating
temperatureinsidethecase.
3.Neverapplymorethanthemaximumratingtothe
oscilloscopeinputs.
CH1, CH2INPUTjacks:
500Vp-por250V (dc+ acpeak)
EXTTRIGINPUTandZ AXISINPUTjacks:
50V (dc+ acpeak)
Neverapplyexternalvoltagetotheoscilloscopeoutput
terminals.
4. Alwaysconnecta cablefromtheearthground(GND)
jackoftheoscilloscopetothechassisoftheequipment
undertest.Withoutthiscaution,theentirecurrentfor
theequipmentundertestmaybedrawnthroughthe
probeclipleadsundercertaincircumstances.Suchcon-
ditionscouldalsoposea safetyhazard,whichthe
groundcablewillprevent.
5.Alwaysusetheprobegroundclipsforbestresults.Do
notuseanexternalgroundwireinlieuoftheprobe
groundclips,asundesiredsignalsmaybeintroduced.
6.Operationadjacenttoequipmentwhichproducesstrong
acmagneticfieldsshouldbeavoidedwherepossible.
Thisincludessuchdevicesaslargepowersupplies,
transformers,electricmotors,etc.,thatareoftenfound
inanindustrialenvironment.Strongmagneticshields
canexceedthepracticalCRTmagneticshieldinglimits
andresultinterferenceanddistortion.
7.Probecompensationadjustmentmatchestheprobeto
theinputofthescope.Forbestresults,compensation
ofprobeshouldbeadjustedinitially,thenthesamepro-
bealwaysusedwiththeinputofscope.Probecompen-
sationshouldbereadjustedwhenevera probefroma
differentscopeisused.(Seepage17)
8.InX-Yoperation,donotpulloutthePULLx10MAG
switch. Ifpulledoutit,noisemayappeareonthe
waveform.
7

Plugconfiguration Powercordandplugtype
Factoryinstalledinstrument
fuse
Valueinparentheses( ) is
fortheCS-1025
Linecordplugfuse
NorthAmerican
120volt/60Hz
Rated15amp
(12ampmax;NEC)
0.8A
(0.5A),250V
Fastblow
6x 30mm
None
UniversalEurope
220volt/50Hz
Rated16amp
0.25A,250V
T.lag
5x 20mm
None
U.K.
240volt/50Hz
Rated13amp
0.5A
(0.3A),250V
Fastblow
6x 30mm
0.3A
TypeC
Australian
240volt/50Hz
Rated10amp
0.5A
(0.3A),250V
Fastblow
6x 30mm
None
NorthAmerican
240volt/60Hz
Rated15amp
(12ampmax;NEC)
0.5A
(0.3A),250V
Fastblow
6x 30mm
None
Switzerland
240volt/50Hz
Rated10amp
0.5A
(0.3A),250V
Fastblow
6x 30mm
None
Fig. 1 PowerInputVoltageConfiguration
8

CONTROLSANDINDICATORS
CS-1044
CS-1025
FRONTPANEL
0T POSITION
Rotationadjustsverticalpositionofchannel1 trace.
InX-Yoperation,rotationadjustsverticalpositionof
display.
®VOLTS/DIV
Verticalattenuatorforchannel1;providesstepadjust-
mentofverticalsensitivity.WhenVARIABLEcontrol
(3)issettoCAL,verticalsensitivityiscalibratedin12
stepsfrom5 V/divto1 mV/div.
ForX-Yoperation,thiscontrolprovidesstepadjustment
ofverticalsensitivity.
(3)VARIABLEControl
Rotationprovidesfinecontrolofchannel1 verticalsen-
sitivity.Inthefullyclockwise(CAL)position,thever-
ticalattenuatoriscalibrated.ForX-Yoperation,this
controlservesastheY axisattenuationfineadjust-
ment.
0AC-GND-DC
Three-positionleverswitchwhichoperatesasfollows:
AC: Blocksdccomponentofchannel1 inputsignal.
GND: Openssignalpathandgroundsinputtovertical
amplifier.Thisprovidesa zero-signalbaseline,
thepositionofwhichcanbeusedasa
referencewhenperformingdcmeasurements.
DC: Directinputofacanddccomponentofchannel
1inputsignal.
(5)INPUTJack
Verticalinputforchannel1 trace.VerticalinputforX-Y
operation.
©VOLTS/DIV
Verticalattenuatorforchannel2;providesstepadjust-
mentofverticalsensitivity.WhenVARIABLEcontrol
(7)issettoCAL,verticalsensitivityiscalibratedin12
stepsfrom5 V/divto1 mV/div.
InX-Yoperation,thiscontrolprovidesstepadjustment
ofhorizontalsensitivity.
(7)VARIABLEControl
Rotationprovidesfinecontrolofchannel2 verticalsen-
sitivity.Inthefullyclockwise(CAL)position,thever-
ticalattenuatoriscalibrated.InX-Yoperation,thiscon-
trolbecomesthefinehorizontalgaincontrol.
Fig. 2

CS-1044
Fig. 3
(DAC-GND-DC
Three-positionleverswitchwhichoperatesasfollows:
AC: Blocksdccomponentofchannel2 input
signal.
GND: Openssignalpathandgroundsinputtover-
ticalamplifier.Thisprovidesa zero-signal
baseline,thepositionofwhichcanbeused
asa referencewhenperformingdc
measurements.
DC: Directinputofacanddccomponentofchan-
nel2 inputsignal.
(9)y INPUTJack
Verticalinputforchannel2 traceinnormalsweep
operation.ExternalhorizontalinputinX-Yoperation.
(f(D• POSITION/PULLINV
T POSITION:
Rotationadjustsverticalpositionofchan-
nel2 trace.
INV:Push-pullswitchselectschannel2 signal
inverted(PULLINV)whenpulledout.
(HereafterPULLINVisdescribedasCH2
INV.)
10
(Q)MODE
Selectsthebasicoperatingmodesoftheoscilloscope.
CH1: Onlytheinputsignaltochannel1 is
displayedasa singletrace.
CH2: Onlytheinputsignaltochannel2 is
displayedasa singletrace.
ALT:Alternatesweepisselectedregardlessof
sweeptime.
CHOP:Chopsweepisselectedregardlessof
sweeptimeatapproximately250kHz.
ADD: Thewaveformsfromchannel1 andchan-
(CH1+CH2) nel2 inputsareaddedandthesumis
displayedasa singletrace.WhentheCH2
INV(fj|)buttonisengaged,thewaveform
fromchannel2 issubtractedfromthe
channel1 waveformandthedifferenceis
displayedasa singletrace.
®POWER,SCALEILLUM
Fullycounterclockwiserotationofthiscontrol(OFF
position)turnsoffoscilloscope.Clockwiserotation
turnsonoscilloscope.Furtherclockwiserotationof
thecontrolincreasestheilluminationlevelofthescale.
(fj)PILOTLamp
Lamplightswhenoscilloscopeisturnedon.
CS-1025