Kenwood CS-6020 User manual

150MHzQUAD TRACEREADOUTOSCILLOSCOPE
CS-6020
100MHzQUAD TRACEREADOUTOSCILLOSCOPE
CS-6010
INSTRUCTION MANUAL
KENWOOD CORPORATION
©PRINTED IN JAPAN B50-7671-10(T)
89/12 11 1098765432188/1211
KENWOOD

SAFETY
Symbol in This Manual
A
This symbolindicateswhereapplicablecautionaryor
otherimformationistobefound.
Power Source
This equipmentoperates from a powersourcethatdoesnot
applymorethan250V rmsbetweenthesupplyconductors
orbetweeneithersupplyconductorandground.A protec-
tivegroundconnectionbywayofthegroundingconductor
inthepowercordisessentialfor safe operation.
Grounding theProduct
This equipmentisgrounded through thegroundingconduc-
torofthepowercord.Toavoidelectricalshock,plugthe
powercord into a properlywiredreceptaclebeforeconnec-
ting totheequipment input or output terminals.
Use theProperPowerCord
Use onlythepowercordandconnectorspecifiedforyour
product.
Use theProper Fuse
To avoidfirehazard,usea fuseofthecorrecttype.
DonotOperateinExplosiveAtmospheres
To avoidexplosion,donotoperatethisproductinanex-
plosive atmosphere.
DonotRemoveCoverorPanel
To avoidpersonalinjury,donotremovethecoverorpanel.
Refer servicingtoqualifiedpersonnel.
VoltageConversion
Ifthepowersourceisnotappliedtoyourproduct,contact
yourdealer.Toavoidelectricalshock,donotperformthe
voltageconversion.
CONTENTS
A SAFETY ...................................................2
FEATURES 3
SPECIFICATIONS ...........................................4
A PRECAUTIONS 7
CONTROLS ANDINDICATORS9
FRONT PANEL... 9
. REAR PANEL 16
READOUT DISPLAY 17
OPERATING INSTRUCTIONS..19
INITIALSTARTING PROCEDURE 19
[1]NORMAL SWEEP OPERATION19
[2]' MAGNIFIED SWEEP OPERATION22
[3] DELAYED SWEEP OPERATION22
[4]X-YOPERATION24
[5]READOUTOPERATION24
[6] CURSOR MEASUREMENTOPERATION26
APPLICATIONS .26
PROBE COMPENSATION26
TRACE ROTATIONCOMPENSATION26
1. DC VOLTAGE MEASUREMENT26
2. MEASUREMENTSOFTHE VOLTAGE
BETWEEN TWOPOINTSONA WAVEFORM27
3. ELIMINATIONOFUNDESIREDSIGNAL
COMPONENTS 28
4. VOLTAGE RATIOMEASUREMENT
USING CURSORS 28
5. TIMEMEASUREMENTS28
6.TIME DIFFERENCE MEASUREMENTS29
7. PULSE WIDTHMEASUREMENTS.30
8. PULSE RISE TIMEAND FALL TIME
MEASUREMENTS 30
9. PHASE DIFFERENCE MEASUREMENTS 32
10.TIMERATIOMEASUREMENTUSING CURSORS..33
11. FREQUENCY MEASUREMENTS. .33
12. RELATIVE MEASUREMENTS.34
13. APPLICATIONOFX-YOPERATION36
14. PULSE JITTER MEASUREMENTS ...37
15. SWEEP MAGNIFICATIONS37
16. DELAYED SWEEP TIMEMEASUREMENTS.38
17. PULSE WIDTHMEASUREMENTS
USING DELAYED SWEEP 39
18. FREQUENCY MEASUREMENTS USING
DELAYED SWEEP 39
19. MEASUREMENTSOF PULSE REPETITIONTIME...39
20.USING DELAYED SWEEP FORMEASUREMENTS
OF RISETIMES AND FALLTIMES 40
21. TIME DIFFERENCE MEASUREMENTSUSING
DELAYED SWEEP 40
22. QUAD-TRACE APPLICATIONS41
23. TRIGGER COUNTEROPERATION(CS-6020only)..41
ADJUSTMENT - 43
AMAINTENANCE45
ACCESSORIES 46
Note: This instructionmanualisdescribedfortwomodels.
Refer toitemappliedtoyourproduct.
2

FEATURES
The model CS-6020 and CS-6010 area four-channelten-
trace oscilloscope with thereadoutfunction(witha calen-
dar) thatcoversa widebandwidthupto150MHz (CS-6010:
100 MHz).A 1 50-mmrectangularCRTdisplay with inner
graticule(accelerationvoltage: CS-6020: 20kV, CS-6010:
17 kV)offershigh-brilliancewaveformobservation.Itin-
corporatesthetriggercountersuitableforwaveformobser-
vationofvideoand digital signals.
1. Highvertical axis sensitivityof1 mV/div.andwide
bandwidththatcoversfullyspecifiedfrequency
response at5 mV/div.
2. Maximumsweeptimeof2 ns/div.(atx 10magnifica-
tion)offershigh-speedwaveformobservation.
3. Thetriggercounterfacilitateswaveformobservationof
a specificlineofvideosignalsaswellas timing fora
series of digital circuit pulses. (CS-6020 only)
4. Withthecross-rangesweeptimevariablefunction,the
SWEEP VARIABLE controlsarecontinuouslyvariable
to both thelower-andhigher-speeddirections,andthus
provide easy adjustmentofthewaveform with a
changedsweeprange.(Allrangescanbecontinuously
adjusted with the SWEEP VARIABLE controlsonly.)
5. Thex 10MAGswitchand SWEEP VARIABLE control
are inactivefortheA sweepinthedelayedsweep
mode;consequently,B sweepwaveformcanbecom-
pared with A sweepwaveforminaneasy-to-seecon-
dition.
6. Free verticalmodeselectionofCH1toCH4andADD
offers easy observationofwaveformcomposedofa lot
ofsignalcomponents.
7. Thereadoutfunctiondisplays,inletters,each scale fac-
toronthe CRT, andeliminatestroublesomerangecon-
firmation inobservingwaveform.
8. Thecursormeasurementmodedisplays,inletters,vol-
tagedifference,voltageratio,timedifference,timera-
tio,frequency,andphasedifference,havingbeen
calculated byanobserver,correspondingtomovement
oftwocursors.Itenablesaccuratewaveformobser-
vation.
9. Duringsinglesweepwaveformobservation,the
READOUT valuesand scale illuminationaredisplayed
oncesimultaneously with waveformdisplay,whichis
suitableforphotography.
10. DateandtimedisplayontheCRTfacilitatesdata
storagebyphotography.
11. Thelogiccontrolsystemprovidessmoothand light-
touchpaneloperation.Theback-upfunctionstores set-
ting onthepanelwhenthepoweristurnedoff.
12. The built-in fixingcircuitprovidesautomaticand sta-
blesynchronizationandeliminatestroublesome syn-
chronizingoperationevenifwaveformamplitude
changes.
13. BoththeTVframeandlinesignalsaresynchronized
from smallamplitudetolargeamplitudefree from ad-
justment.
14. Thetriggercoupling HFREJ functionsecurelytriggers
signals with higherharmonics.
3

SPECIFICATIONS
CS-6020 CS-6010
CRT
150 mmrectangularwithinternalgraticule
Acceleration Voltage
20 kV
17 kV
Display Area
8x 10div(1div= 10mm)
VERTICAL AXIS(CH1andCH2)
Sensitivity
5 mV/divto5 V/div±2%(10°Cto35°C)
1 mV/divto2 V/div±4%(10°Cto35°C)
Attenuator
12 steps, 1 mV/divto5 V/divin1-2-5sequence
Vernier controlforfullyadjustablesensitivitybetweensteps
InputImpedance
1 M0±1%,20pF±3pF
Frequency Response
5 mV/divto5 V/div
DC; DCto150MHz,within-3dB
AC; 5 Hzto150MHz,within-3dB
DC; DCto100MHz,within-3dB
AC; 5 Hzto100MHz,within-3dB
1 mV/div,2 mV/div
DC; DCto20MHz,within-3dB
AC; 5 Hzto20MHz,within-3dB
Rise Time
2.3 nsec or less (5mV/divto5 V/div)
17.5 nsec or less (1mV/div,2 mV/div)
3.5 nsec or less (5mV/divto5 V/div)
1 7.5 nsec or less (1mV/div,2 mV/div)
Signal DelayTime Morethan10
nsec ontheCRTscreen
Crosstalk
-40 dBor less (at1 kHz)
OperatingModes cm
CH1 singletracedisplay,anddualtoquadtracedisplayincombinationwithotherchannel(s)
OperatingModes
CH2 CH2
singletracedisplay,anddualtoquadtracedisplayincombinationwithotherchannel(s)
OperatingModes
CH3 CH3
singletracedisplay,anddualtoquadtracedisplayincombinationwithotherchannel(s)
OperatingModes
CH4 CH4
singletracedisplay,anddualtoquadtracedisplayincombinationwithotherchannel(s)
OperatingModes
ADD
CH1 + (±CH2)addeddisplay,anddualtoquadtracedisplayincombinationwithother
channel (s)
OperatingModes
ALT
Dual toquadtracealternating
OperatingModes
CHOP
Dual toquadtracechopped
Channel Polarity Normalorinverted,channel2 onlyinverted
BandwidthLimiting Approx.20MHz
Chop Frequency Approx.500kHz
Delay TimeDifference
CH1 toCH2; 0.5 nsec or less
CH1, CH2toCHS,CH4; 1 nsec or less
Non-distortedMaximum
Amplitude Morethan8 div(DCto
1 50MHz) Morethan8 div(DCto100MHz)
MaximumInputVoltage800Vp-por400V (DC+ ACpeak)
VERTICAL AXIS(CH3andCH4)
Sensitivity
0.1V/div,0.5V/div,±2%(10°Cto35°C)
InputImpedance
1 Mfi±1%,20pF±3pF
CouplingMethod
DC coupling
Frequency Response
DC to150MHz,within-3dB
DC to100MHz,within-3dB
Rise Time
2.3 nsec or less (at 1 50MHz)
3.5 nsec or less (at100MHz)
AMaximumInputVoltage
800 Vp-por400V (DC+ ACpeak)
HORIZONTAL AXIS(InputthruCH2)
OperatingModes With
HORIZ. MODEswitch,X-Yoperationisselectable
CH1 toCH4andADD; Y axis
CH2 ; X axis
Sensitivity
Same asvertical axis (CH2)
InputImpedance
Same asvertical axis (CH2)
Frequency
Response
DC DC
to2 MHz,within-3dB
Frequency
Response
AC
5 Hzto2 MHz,within-3dB
X-Y Phase Difference 3°or
less at100kHz
/f\MaximumInputVoltage
Same asvertical axis (CH2)
4

CS-6020 CS-6010
SWEEP
Type
A A
sweep
Type
A INTB
B sweepwaveformisdisplayedasanintensified portion oftheA sweep.
Type
ALT A
sweep(intensifiedfor duration ofB sweep)andB sweep(delayedsweep)alternating
Type
B B
sweep
Type
X-Y X-Y
oscilloscope
Sweep Time
A 20
ns/divto0.5s/div,±2%(10°Cto35°C),in23ranges,in1-2-5sequence
Vernier control provides fully adjustablesweep time allranges.
Sweep Time
B 20
ns/divto5 ms/div,±2%(10°Cto35°C),in17ranges,in1-2-5sequence
Vernier control provides fully adjustablesweep time allranges.
Sweep Magnification
x 10(tentimes)±5%(AandB)
Linearity
20 ns/divto0.5s/div: ±3%(±5%,atx10MAG)
Holdoff
ContinuouslyvariableforA sweep from NORMtomorethanfivetimes
Trace Separation
B sweepcanbeseparated from A sweepupto4 divisionsdownward,
continuouslyadjustable.
Delay Method
Continuousdelay,TriggerdelayandTriggercount
Delay Time Continuousdelay,Triggerdelay; 0.2to10timesofA
SWEEP TIME/DIVsetvalue
(5,000 countfullscale)
TriggerCount 1 to1,000count,Max.usablefrequency;10MHz -
Delay Accuracy
±(1% ofsetvalue+2%offullscale)- (0to100ns)
Delay Jitter 1/20,000(Asweep:at1 ms/div,B sweep:at1 jis/div)
TRIGGERING
A TriggerModes
AUTO, NORM, SINGLE, FIX
A Trigger
Source
V.MODE Triggeredby input signalselected with VERTICAL MODE selector A Trigger
Source
cm TriggeredbyCH1vertical
axis input signal
A Trigger
Source
CH2
TriggeredbyCH2vertical axis input signal
A Trigger
Source
CH3
TriggeredbyCH3vertical axis input signal
A Trigger
Source
CH4 TriggeredbyCH4vertical axis input signal
A Trigger
Source
LINE Triggeredbylinefrequency
A TriggerCoupling AC,
NOISEREJ, HFREJ, DC,TV FRAME, TV LINE
A TriggerLevel ±90° adjustable
A TriggerPolarity • + /-
B TriggerModes Sterts AfterDelay,B TriggerableAfter
Delay and TRIG COUNT
Sterts AfterDelay,B TriggerableAfter
Delay
B Trigger
Source
CH1 TriggeredbyCH1vertical axis input signal B Trigger
Source
CH2 TriggeredbyCH2vertical axis input signal
B Trigger
Source
CH3
TriggeredbyCHSvertical axis input signal
B Trigger
Source
CH4 TriggeredbyCH4vertical axis input signal
B TriggerCoupling AC,
NOISEREJ, HFREJ, DC,TV LINE
B TriggerLevel ±90° adjustable
B TriggerPolarity
+ /-
TriggerSensitivity
COUPLING FREQUENCY RANGE
MINIMUM SYNC
AMPLITUDE
FREQUENCY RANGE
MINIMUM SYNC
AMPLITUDE
TriggerSensitivity
DC DC to50MHz
DC to150MHz
1 div
1.5div
DC to50MHz
DC to100MHz
1 div
1.5div
TriggerSensitivity
AC 20
Hzto50MHz
20 Hzto 1 50MHz
1 div
1.5div
20 Hzto50MHz
20 Hzto100MHz
1 div
1.5div
TriggerSensitivity
NOISEREJ Two timesof minimum syncamplitude.
TriggerSensitivity
HFREJ Increased minimum sync amplitude forabove30kHz.
TriggerSensitivity
TV FRAME 1 div(140 IRE)
TriggerSensitivity
TV LINE 1 div(140 IRE)
AUTO: SameasabovespecificationFIX:Sameasabovespecificationforabove40Hz.
forabove50Hz
5

CS-6020 CS-6010
Jitter
0.5 nsec or less at 1 50MHzat2 ns/div
sweep rate(x10MAGon)
0.5 nsec or less at100MHzat2 ns/div
sweep rate(x10MAGon)
INTENSITY MODULATION
Inputsignal
TTL level(morethan2 Vp-p),positivevoltage decreases brightness
InputImpedance Approx.10kfl
Usable FrequencyRange
DC to10MHz
AMaximumInputVoltage
50 V (DC+ ACpeak)
VERTICAL AXISOUTPUT(CH1only)
Outputvoltage Approx.50mVp-p/div(into500 load)
OutputImpedance Approx.500
Frequency Response
100 Hzto150MHz, within -3dB
(at into 500)
100 Hzto100MHz, within -3dB
(at into 50fi)
TRACE ROTATION
Electrical, adjustable from front panel
CALIBRATION VOLTAGE
1 V p-p± 1 %,Positivesquare wave, 1 kHz±3%
READOUT
Calendar
Year/Month/Day/O'clock/Minute
Clock accuracy;±2 min./month
Battery life:About30,000hours(atroomtemperature)
Set Value
CH1 — CH4 scale factor(withprobedetec-
tion),GND, AC/DC, V-UNCAL, ADD,
INVERT, BW,A andB sweep scale factor
(magnificationconversion),
SWEEP VERIABLE UNCAL, X-Y (CH2-X),
DELAY TIME, TRIG. COUNT
CH1 —CH4 scale factor(withprobedetec-
tion),GND, AC/DC, V-UNCAL, ADD,
INVERT, BW,A andB sweep scale factor
(magnificationconversion),
SWEEP VERIABLE UNCAL, X-Y (CH2-X),
DELAY TIME
Cursor Mode
AV1
VoltagedifferencebetweenAREF and^cursorsona CH1 scale factor basis
Cursor Mode
AV2
Voltagedifferencebetween ziREF andzlcursorsona CH2 scale factor basis
Cursor Mode
AT
Time differencebetween zlREF andZlcursorsonthe basis ofsweep scale factor
Cursor Mode
MAT
Frequency between zlREF andzlcursorsonthe basis ofsweep scale factor
RATIO: VoltageratioandtimeratiobetweenAREF andzlcursors,supposing5-division
ontheCRTas100%
PHASE: Phase differencebetween zlREF and zlcursors, supposing5-divisiononthe CRT
as 360°
Cursor
Meas-
urement
Resolution
10 bits
Cursor
Meas-
urement
Measurement
accuracy
±3%
Cursor
Meas-
urement
Measurement range
Vertical direction:± 3.6divormore from theCRTcenter
Horizontaldirection:±4.6divormore from theCRTcenter
POWER REQUIREMENT
Line Voltage
100 V/120V/220V/240VAC±10%
Line Frequency
50/60 Hz
Power Consumption Maximum75W
DIMENSIONS(WxHxD)
310 (332)x 150(163)x400(448)mm
( ) dimensionsincludeprotrusion from basic outlinedimensions
WEIGHT
Approx.9.6kg
ENVIRONMENTAL
WithinSpecifications 10°Cto35°C,85%max.relative
humidity
Full Operation 0°Cto40°C,85%max.relative
humidity
ACCESSORIES SUPPLIED
Probe
PC-31 (READOUT compatibleprobe)x 2
Attenuation1/10
Inputimpedance10Mfi+1%,14pF+10%
Replacement Fuse
1.2Ax2,0.8Ax2
InstructionManual
1
*Circuitandratingaresubjecttochange without noticeduetodevelopmentsintechnology.

PRECAUTIONS
SAFETY
Before connectingtheinstrumenttothepower source, care-
fullyreadthe following information,thenverifythatthe
powercordandpowerlinefuseareonesforyourpowerline.
The instrument'srearpanelhasa fuseholderonthe left of
theACinletterminal(thefuseholeralso serves asa vol-
tageselector).Thevalueunderthetriangle• markedon
theholderindicatesthelinevoltagesetfortheinstrument.
Ifthepowercordisnotapplied with thecorrectvoltage,
thereisa danger from electricshock.
•Whenconvertingthevoltage,refertotheMaintenance
section.
Line voltage
This instrumentoperatesusingac-power input voltagesthat
100/120/220/240 V atfrequencies from 50Hzto60Hz.
Power cord
The groundwireofthe3-wireacpowerplugplacesthe
chassis andhousingoftheoscilloscopeatearthground.Do
notattempttodefeatthegroundwireconnectionorfloat
theoscilloscope;todosomayposea greatsafetyhazard.
The appropriatepowercordissuppliedbyan option that
is specifiedwhentheinstrumentisordered.
The optionalpowercordsareshownasfollowsinFig.1.
Line fuse
The fuseholderislocatedontherearpanelandcontains
theline fuse. Verifythattheproperfuseisinstalledby
replacingtheline fuse.
EQUIPMENT PROTECTION
1. Neverusetheinstrumentinthe following conditions
where:
1) Theinstrumentisexposedtodirectsunlight.
2) Thetemperatureand humidity istoohigh.
3) Muchmechanicalvibrationsareproduced.
4) Theinstrumentisexposedtoexplosivegas.
2. Neverallowa smallspotofhighbrilliancetoremain sta-
tionaryonthescreenformorethana few seconds. The
screen maybecomepermanentlyburned.A spotwill
occur onlywhenthescopeissetupforX-Yoperation
and nosignalisapplied.Eitherreducetheintensityso
thespotisbarelyvisible,switchbacktonormalsweep
operationwhennosignalisapplied,orsetupthescope
forspotblanking.
3. Nevercovertheventilatingholesonthetopoftheos-
cilloscope, asthiswillincreasetheoperatingtempera-
tureinsidethe case.
4. Neverapplymorethanthemaximumratingtotheos-
cilloscope inputs.
CH1 toCH4:800Vp-por400V (DC+ ACpeak)
Z axis: 50V (DC + ACpeak)
Never applyexternalvoltagetotheoscilloscope out-
putterminals.
5. Alwaysconnecta cable from theearthground(GND)
jack oftheoscilloscopetothe chassis oftheequipment
undertest. Without thiscaution,theentirecurrentfor
theequipmentundertestmaybedrawn through the
probeclipleadsundercertain circumstances. Such con-
ditionscouldalsoposea safetyhazard,whichthe
groundcablewillprevent.
6. Alwaysusetheprobegroundclipsforbestresults.Do
notuseanexternalgroundwireinlieuoftheprobe
groundclips,asundesiredsignalsmaybeintroduced.
7. Operationadjacenttoequipmentwhichproducesstrong
ac magneticfieldsshouldbeavoidedwherepossible.
This includessuchdevicesaslargepowersupplies,
transformers, electricmotors,etc.,thatare often found
inanindustrialenvironment.Strongmagneticshields
can exceedthepractical CRT magneticshieldinglimits
and resultinterferenceanddistortion.
8. Probecompensationadjustmentmatchestheprobeto
the input ofthescope.Forbestresults,compensation
ofprobeshouldbeadjustedinitially,thenthesamepro-
be always used with the input ofscope.Probecompen-
sationshouldbereadjustedwhenevera probe from a
differentscopeis used. (Seepage26)
9. When turning onandoffthe POWER switchrepeated-
ly,keepanintervalofabout5 seconds. Faster onand
offoperationmay cause malfunctiontotheinstrument.
10. Donotusetheprovided PC-31 probe with other meas-
uringequipmentbecauseitincorporatesa terminalfor
READOUT detectionwhich might damagetheother
equipment.
11. Thecalendar,clock,andsetvaluesonthepanelare
backed upbya built-in battery.Ifthebatteryisabout
toexpireitslife, "BATT. DOWN"isdisplayedonthe
calendar andclockdisplay,anddataset with controls
onthepanelarenotstoredbutinitialized.Thebattery
shouldbereplaced.Astobatteryreplacement,please
inquireatourdistributerwhereyoupurchasedthein-
strument.
Note:
InitialSetting
VERTICAL MODE: CH1
AC-DC coupling: AC
TRIGGERING MODE: AUTO
TRIGGERING SOURCE : VERT orCH1
TRIGGERING COUPLING : AC
HORIZONTAL MODE: A
The otherswitchesarealloff
CH1 VOLTS/DIV : 50mV/div
SWEEP TIME : 50/is/div
7

Plug configuration
Power cordandplugtype
Factory installed
instrumentfuse
Line cordplugfuse
North American
120 volt/60Hz
Rated 1 5 amp
(12 ampmax;NEC)
1.2A,250V
Fast blow
6x30 mm None
Universal Europe
220 volt/50Hz
Rated 16amp
0.8A,250V
T. lag
5 x 20mm None
U.K.
240 volt/50Hz
Rated 13amp
0.8A,250V
Fast blow
6x30 mm
0.8A
Type C
Australian
240 volt/50Hz
Rated 10amp
0.8A,250V
Fast blow
6x30 mm None
North American
240 volt/60Hz
Rated 15amp
(12 ampmax;NEC)
0.8A,250V
Fast blow
6x30 mm None
Switzerland
240 volt/50Hz
Rated 10amp
0.8A,250V
Fast blow
6x30 mm None
Fig. 1 PowerInputVoltageConfiguration
8

CONTROLS ANDINDICATORS
FRONT PANEL
Fig. 2
©POWERSwitch
Depressing thisswitchsuppliespower.Another press-
ing(switchreleased)turnsoffpower.
(2) SCALE ILLUM/PULL TRACE ROTAControl
SCALE ILLUM: Controlsintensityofthegraticuleonthe
CRT.
Iftheilluminationistoo bright, halationmaybecaused
inphotography.Insucha case, rotatethisknobtocon-
trol intensity.
Note:IftheMODEselector© issetto SINGLE, the
scale illuminationlightsupforapprox.1 second
foreverysweep.
TRACE ROTA: Changesinclinationofthehorizontal
trace line.Usedwhenthetraceis tilt-
ed byterrestrialmagnetism,etc.
© FOCUS/PULL ASTIG Control
FOCUS: Adjuststhefocusforoptimumwaveformob-
servation.
ASTIG: Adjusts,inthepulled-outposition,astigmatism
ofthetraceorspotforoptimumwaveformob-
servation. Thespotisroundifastigmatismis
properlyadjusted.
®READOUTINTENControl
Adjusts intensityofthe READOUT values. Fullclock-
wise rotationmaximizesintensity.Fullcounterclock-
wise rotationturnsoffthereadoutfunctionand
disappears READOUT values.
©A INTEN/PULLB INTENControl
A INTEN: ControlsintensityoftheA sweeptraceline.
Also controlsintensityofX-Yoperation.
B INTEN: ControlsintensityoftheB sweeptraceline,
inpulled-outposition.
©CAL1 Vp-p«1kHzTerminal
Outputs1 kHzpositivesquarewaveof1.0Vp-pfor
calibration.Priortousingthisterminal,besuretocom-
pensate a probepriortobe used. Ifimproperlycompen-
sated, itwillnotprovidecorrectmeasurement.
(Z)X.GroundTerminal/Bindingpost
Groundterminaloftheinstrument.
©CH1Input Jack
Vertical axis inputterminalofchannel1.Also serves
as the Y-axis inputterminalintheX-Yoperation.
©CH2orX Input Jack
Vertical axis inputterminalofchannel2.Also serves
as the X-axis and Y-axis inputterminalintheX-Y
operation.
©CH3Input Jack
Vertical axis inputterminalofchannel3.Also serves
as the Y-axis inputterminalintheX-Yoperation.
©CH4 Input Jack
Vertical axis inputterminalofchannel4.Also serves
as the Y-axis inputterminalintheX-Yoperation.
@ VERTICAL MODESwitches
Select operationmodesofthevertical axis. By press-
inga switch,thecorrespondingLEDlightsuptoindi-
cate thatthemodeisselected.Bypressinga lighting
switch, itsLEDgoesoutandthemodebecomesun-
selected.
CH1 : Thechannel-1inputsignalisdisplayed
onthe CRT.
CH2 : Thechannel-2inputsignalisdisplayed
onthe CRT.
9

Fig. 3
CH3 : Thechannel-3 input signalisdisplayed
ontheCRT.
CH4 : Thechannel-4 input signalisdisplayed
ontheCRT.
ADD : Algebraicsumofchannel-1and
channel-2signalsisdisplayedonthe CRT.
IftheCH2INVisselected,difference
ofchannel-1andchannel-2signalsis
displayed.
CHOP/ALT : PressingtheswitchturnsontheLED
andselectschoppingoperation,which
displays channelsalternatelyatapprox.
500 kHzinthemulti-tracemode.Chop-
ping issuitableforobservationofslow
sweep time.
Anotherpressoftheswitchturnsoffthe
LED andselectsALToperation,which
displays channelsalternatelyinthemulti-
tracemodeevery time the trigger signal
is input. ALToperationissuitableforob-
servationoffastsweeptime.
NOTE: Choppingisnotactivatedinthe
single-tracemode.Ifmulti-trace
choppingoperationischanged
into thesingle-traceoperation,
the CHOP LEDgoesout.It
lightsupandchoppingisacti-
vatedwhenthemulti-trace
operationisselectedagain.
CH2 INV: PressingtheswitchturnsontheLED
andinverts polarity ofthechannel-2
signal. Anotherpressoftheswitch
turnsofftheLEDandrestoresthenor-
malpolarity.
20 MHzBWL:PressingtheswitchturnsontheLED
andlimitsthebandwidthtoapprox.
20 MHz.Anotherpressoftheswitch
turnsofftheLEDandrestoresthe
specifiedbandwidth.
©CH1 VARIABLE Control
Fine adjustmentofthechannel-1 axis verticalattenua-
tion forcontinuousvariationbetweenrangesselected
with the VOLT/DIV control.Fullclockwise rotation to
theCAL position calibratestheattenuator.Also serves
as a fineadjustmentofthe Y-axis attenuationintheX-
Y operation.
®CH1VOLTS/DIVControl
Channel-1 vertical axis attenuatorforsettingvertical
axis sensitivity from 1 mV/div.to5 V/div.in1-2-5se-
quence(from 10 mV/div.to50V/div.iftheprobePC-31
compatible with thereadout function is used). Setting
theCH1 VARIABLE control © totheCAL position pro-
vides calibratedvertical axis sensitivity.Also serves as
an attenuatorofthe Y-axis intheX-Yoperation.For
thevertical axis sensitivity,confirmthe READOUT dis-
playontheCRT.
©CH1• POSITIONControl
Adjustsvertical position ofchannel-1waveformdis-
playedonthe CRT. Alsousedtoadjustthe Y-axis po-
sitionintheX-Yoperation.
©CHI AC-DC Switch
Selects couplingofthechannel-1vertical axis input sig-
nal. Also serves asthe Y-axis input selectorintheX-Y
operation.PressingtheswitchturnsontheLEDand
eliminatesDCcomponent from the input signaltomake
AC input available(ACcoupling).Anotherpressofthe
switchturnsofftheLEDandmakeDC input available
(DC coupling),enablingsignals with DCcomponents
tobeobserved.
NOTE: IftheGNDswitchLED© ison, input signalis
isolated from theverticalamplifier,andthever-
ticalamplifier input isgrounded.
10

@ CH1 GND Switch
Pressing theswitchturnsontheLED,isolatesthe
channel-1 input signal from theverticalamplifier,and
groundstheverticalamplifier input. Bythis,the ground
voltagecanbechecked.Anotherpressoftheswitch
turnsofftheLEDandsuppliesthechannel-1 input sig-
naltotheverticalamplifier.
©CH2 VARIABLE Control
Fine adjustmentofthechannel-2vertical axis attenua-
tion.Providesthesame function astheCH1 VARIA-
BLE control ©.Also serves asa fineattenuation
adjustmentofthe X-axis and Y-axis intheX-Y
operation.
©CH2VOLTS/DIVControl
Channel-2 vertical axis attenuator.Providesthesame
function astheCH1 VOLTS/DIV control @.Also serves
as anattenuatorofthe X-axis and Y-axis intheX-Y
operation.
@ CH2t POSITIONControl
Adjustsvertical position ofchannel-2waveformdis-
playedonthe CRT. Alsousedtoadjustthe Y-axis po-
sitionintheX-Yoperation.
NOTE: IntheX-Yoperation, position ofthe X-axis is
adjusted with the• POSITION control ©.
©CH2 AC-DC Switch
Selects couplingofthechannel-2vertical input signal.
Also serves asthe input selectorofthe X-axis andY-
axis intheX-Yoperation.Providesthesame function
as theCH1 AC-DC switch©.
©CH2GNDSwitch
Pressing theswitchturnsontheLED,isolatesthe
channel-2 input signal from theverticalamplifier,and
groundstheverticalamplifier input. Bythis,the ground
voltagecanbechecked.Anotherpressoftheswitch
turnsofftheLEDandsuppliesthechannel-2 input sig-
naltotheverticalamplifier.
©CH3• POSITIONControl
Adjustsvertical position ofchannel-3waveformdis-
playedonthe CRT. Alsousedtoadjustthe Y-axis po-
sitionintheX-Yoperation.
®CH30.5V/0.1V Switch
Pressing theswitchturnsontheLEDand sets thever-
tical axis sensitivityto0.5V/div.Anotherpressofthe
switchturnsoffthe LED and sets thevertical axis sen-
sitivityto0.1V/div.Also serves asthe Y-axis attenu-
atorintheX-Yoperation.
©CH4• POSITIONControl
Adjustsvertical position ofchannel-4waveformdis-
playedonthe CRT. Alsousedtoadjustthe Y-axis po-
sitionintheX-Yoperation.
©CH40.5V/0.1V Switch
Verticalattenuatorofchannel4.Providesthesame
function astheCH30.5V/0.1V switch© forchan-
nel4.
© CURSORS Switches
Selects thecursormeasurementmodes.
If four LEDs areoff,thecursormeasurementmodeis
deactivated;thecursor,cursormeasurementmode,and
cursormeasurementvaluearenotdisplayedonthe
CRT.
To deactivatethecursormeasurementmode,pressa
lighting switch.
NOTE: Thecursormeasurementisimpossibleforsome
items,dependingoncombinationofthe VER-
TICAL MODE© andHORIZONTALMODE©
switches. Fordetails,refertooperatingin-
structions.
AVI: ActivatesAV\ andAV3 cursormeasurement.
Cursor measurementisactivatedwhenanyof
CH1, CH3,andADDofthe VERTICAL MODE
switches © isselected.Orderofmeasurement
priority ofthesethreechannelsis CH1, CH3,and
ADD. Twohorizontalcursorsaredisplayedonthe
CRT. Voltagedifferenceandvoltage ratio ofthese
cursors aredisplayedposteriortothecursor
measurementmodeintheupper right ofthe CRT.
The AS/1 cursorisusedforvoltagedifference
measurement,iftheCH1 VARIABLE control ©
is settotheCALposition.A valuecalculatedac-
cordingtosettingoftheCH1 VOLTS/DIV con-
trol ® isdisplayedposteriortotheAV\.
Voltage ratio ismeasurediftheCH1 VARIABLE
control © isnotsettotheCALposition;a value
calculatedsupposing5 div.as100%isdisplayed
posteriortothe RATIO.
IntheAV3 cursormeasurement,a value calcu-
latedaccordingtosettingoftheCH30.5V/0.1V
is displayedposteriortothe A\/3.
IftheADDofthe VERTICAL MODEswitches©
is selected,voltagedifference(AVI) ismeasured
underthe condition wheretheCH1 VOLTS/DIV
control © andCH2 VOLTS/DIV control © areset
tothesamelevelaswellasthe VARIABLE con-
trol © and© aresettoCAL.Otherwise,voltage
ratio (RATIO) ismeasured.
Ifthezlcursorisbelowthe zlREF cursor,a nega-
tive(-)valueisdisplayed.
AV2: ActivatesAV2 andAV4 cursormeasurement
whenCH2orCH4ofthe VERTICAL MODE
switches © isselected.Orderofmeasurement
priority ofthesetwochannelsisCH2andCH4.
Two horizontalcursorsaredisplayedonthe CRT.
Voltagedifferenceandvoltage ratio ofthesecur-
sors aredisplayedposteriortothecursor meas-
urementmodeintheupper right oftheCRT.
The AV2 cursorisusedforvoltagedifference
measurement,iftheCH2 VARIABLE control ©
is settoCALposition.A valuecalculatedaccord-
ingtosettingoftheCH2 VOLTS/DIV control ©
is displayedposteriortotheA\/2.
Voltage ratio ismeasurediftheCH2 VARIABLE
control © isnotsettotheCALposition;a value
calculatedsupposing5 div.as100%isdisplayed
posteriortothe RATIO.
intheAV4 cursormeasurement,a value calcu-
latedaccordingtosettingoftheCH40.5V/0.1V
switchisdisplayedposteriortothe .4V4.
Ifthezicursorisbelowthe AREF cursor,a nega-
tive(-)valueisdisplayed.
11

Fig. 4
NOTE: IfX-YoftheHORIZONTALMODE
switches (30) isselected,AMI isusedfor
voltagedifferenceandvoltage ratio meas-
urementofthe X-axis. Thus, verticalcur-
sors aredisplayed.
AT: ThisswitchfunctionswhenA andB ofthe
HORIZONTAL MODEswitches® areselected.
Two verticalcursorsaredisplayedontheCRT.
Time differenceand time ratio ofthesecursors
are displayedposteriortothecursormeasurement
modeintheupper right oftheCRT.
Time differenceismeasured,ifthe SWEEP VARI-
ABLE control (32) issettotheCALposition.A value
calculatedaccordingtosettingofthe SWEEP
TIME/DIV control ® isdisplayedposteriortothe
AT. Time ratio ismeasuredifthe SWEEP VARIA-
BLE control (32) isnotsettotheCALposition;a
value calculatedsupposing5 div.as100%isdis-
playedposteriortothe RATIO.
Ifthezicursorisonthe left ofthe AREF cursor,
a negative(-)valueisdisplayed.
1MT:This switchfunctionswhenA andB ofthe
HORIZONTAL MODEswitches(§)areselected.
Two verticalcursorsaredisplayedontheCRT.
Frequency betweenthesetwocursorsandtheir
phase differencearedisplayedposteriortothe
cursormeasurementmodeintheupper right of
theCRT.
Frequency ismeasured,ifthe SWEEP VARIABLE
control (32) issettotheCALposition.A value cal-
culatedaccordingtosettingofthe SWEEP
TIME/DIV control @ isdisplayedposteriortothe
1 /AT. Phase differenceismeasuredifthe SWEEP
VARIABLE control isnotsettotheCALposition;
a valuecalculatedsupposing5 div.as 360° isdis-
playedposteriortothe PHASE.
Ifthezlcursorisonthe left ofthe ZlREF cursor,
a negative(-)valueisdisplayed.Frequency,
however,isdisplayedintheabsolutevalue.
(28) ^REF/DELAY POSITIONControl
Shifts thereferencecursor(finebrokenline)ofthetwo
cursors displayedontheCRTinthecursormeasure-
ment.Clockwise rotation shiftsthecursoruportothe
right. Counterclockwise rotation shiftsitdownortothe
left. Inthedelayedsweepmode,this control isused
formovingthedelay position aswellascounting with
the TRIG COUNT.
NOTE: Todisplaythedelay time anddelaycountvalue
inthedelayedsweepmode,deactivatethecur-
sor measurementmodeselectorswitches.
Rapid rotation ofthis control knobmaycause
improperoperation. Thus, rotate itslowly.
(§) A Control
Shifts themeasurementcursor(roughbrokenline)of
thetwocursorsdisplayedontheCRTinthecursor
measurement.Clockwise rotation shiftsthecursorup
ortothe right. Counterclockwise rotation shiftsitdown
ortothe left.
NOTE: Rapid rotation ofthis control knobmaycause
improperoperation. Thus, rotate itslowly.
(§)HORIZONTALMODESwitches
Selects operationmodesofthehorizontal axis. Press-
inga switchturnsonits LED, whichindicates that the
switchisselected.
A: . ActivatestheA sweeponly.
A INTB:Increasesintensityofa B sweep portion on
A sweepwaveform.IntensityoftheA sweep
andB sweepiscontrolled with theA INTEN/
PULL B INTEN©.
12

ALT: DisplaysA sweepandB sweep(delayed
sweep) alternately.Intensityofa B sweep
portion displayedonA sweepwaveformisin-
creased.
B: ActivatestheB sweep only.
X-Y: TheCS-6020functionsasanoscilloscopeus-
ing CH1, CH2,CH3,orCH4asthe Y-axis and
CH2 asthe X-axis.
NOTE: SincetheB sweepdoesnot provide
theautomaticfree running function,
nowaveformisdisplayedifnot trig-
gered.Besureto trigger theB sweep
with theB LEVEL (§).
© SWEEP TIME/DIVControl
Sets sweep time oftheA sweepandB sweep.
IfA oftheHORIZONTALMODEswitches® isselect-
ed, this control selectstheA sweep time in 1 -2-5steps
in23ranges from 20ns/div.to0.5s/div.Clockwise
rotation changessweep time toward 20ns/div.Coun-
terclockwise rotation changesit toward 0.5s/div.
IfA INTB,ALT,orB oftheHORIZONTALMODE
switches (30) isselected,itselectstheB sweep time in
1-2-5stepsin 1 7 ranges from 20ns/div.to5 ms/div.
Sweep time shallbecheckedontheCRT.
The B sweep time isnot longer than theA sweep time.
IfX-YoftheHORIZONTALMODEswitchesisselect-
ed, A andB SWEEP TIME/DIVrangedisplaysdisappear,
andinsteadCH2-Xisdisplayed.
(32) SWEEP VARIABLEControl
Fine adjustmentofA sweep time andB sweep time.
This control providescontinuousvariation from low-
speedtohigh-speedsweep(Cross-RangeVariable
Function).
ItadjuststheA sweep time ifA oftheHORIZONTAL
MODEswitches (30) isselected,whileadjustsB sweep
time ifA INTB,ALT,orB oftheHORIZONTALMODE
switchesisselected.Itdoesnot function ifX-Yis
selected.
IntheUNCAL(ibration) condition, a ">"isdisplayed
just before A SWEEP TIME/DIVdisplayontheCRT,if
the VARIABLE control functionsastheA SweepVari-
able control (i.e.,A oftheHORIZONTALswitchesis
selected). Likewise,intheUNCAL condition, itisdis-
played before B SWEEP/DIV, ifthe VARIABLE functions
as theB SweepVariable control (i.e.,A INTB,ALT,
orB oftheHORIZONTALswitchesisselected).
To changetheUNCALtoCAL(ibration) condition, ro-
tate the SWEEP TIME/DIV control ©.
NOTE: Even iftheA sweepisintheUNCAL condition,
changing setting oftheHORIZONTALMODE
switches from A into thedelayedsweep mode (A
INTB,ALT,orB)automaticallyestablishestheA
sweepintheCAL condition. TheUNCALcondi-
tion canberestoredbyselectingA switchagain.
Rapid rotation ofthis control knob maycause
improper operation.Rotateitslowly.
@ POSITIONControl
Moveswaveforminthe horizontal direction forhorizon-
tal position adjustment.Alsoadjuststhe X-axis posi-
tion intheX-Yoperation.
NOTE: Rapid rotation ofthis control knob maycause
improper operation.Rotateitslowly.
(g)x10MAGSwitch
Pressing theswitchturnsontheLEDanddecuplesthe
sweep time. Anotherpressoftheswitchturnsoffthe
LED andrestoresthe normal mode.
This switchhasthe following functions depending on
setting oftheHORIZONTALMODEswitches(§).
A: A sweep only, x 10MAGisselectable.
A INTB:x 10MAGisnotselectable.
ALT: B sweep only, x 10MAGisselectable.
B: B sweep only, x 10MAGisselectable.
X-Y: x 10MAGisnotselectable.
NOTE: Underthe condition whereA,ALT,orB ofthe
HORIZONTAL MODEswitchesisselectedand
thex 10MAGisdepressed,pressingA INTB
orX-Yestablishesthe normal mode automati-
cally.IfA,ALT,orB isselectedagain,thex 10
MAG mode isrestored.
(§)A TRIGGERING SOURCE (A SOURCE) SelectorSwitch
and LEDs
Selects a trigger sourceofA sweep.Everypressofthe
•switchadvancesa selectedLED from left to right in
sequence. Nextto LINE, VERT isselected.(Aselected
LED advancesattheintervalofapprox.0.5secondby
keepingpressingtheswitch.)
NOTE: If VERT isselected,anyLEDofCH 1 toCH4also
lights up(dependingon setting ofthe VERTICAL
MODEswitches©).
VERT: TriggersourceofA sweepisselected with the
VERTICAL MODEswitches©.Itisselectedin
the following order of priority, if more than one
ofthe VERTICAL MODEswitchesisselected.
CH1 -+CH2- CH3->CH4ADD(CH1)
NOTE: IfADDofthe VERTICAL MODEswitches
©isselectedinthesingletracemode,
CH1 isdisplayedasA SOURCE.
CH1: A sweepis triggered bychannel-1vertical axis
input signal.
CH2: A sweepis triggered bychannel-2vertical axis
input signal.
CH3: A sweepis triggered bychannel-3vertical axis
input signal.
CH4: A sweepis triggered bychannel-4vertical axis
input signal.
LINE: Triggeredbycommercialfrequency.
A COUPLING (§)switchisfixedtoAC.Ifanother
trigger sourceisselected,previous condition is
restored.
NOTE: IfA COUPLING (§)switchissettoTV
FRAME orTV LINE, LINE oftheA
SOURCE switchcannotbeselected.
(§)HOLDOFFControl
Adjuststheintervalbetweensweepoperations.Clock-
wise rotation from theNORM position, i.e., full coun-
terclockwise position, increasesthe hold-off time. Full
clockwise rotation providesvariation more than five
times.
© TRACE SEP(aration)Control
Counterclockwise rotation moves down theB sweep
tracelinebyapprox.4 div. with respecttotheA sweep
traceline.This control functionswhenALTorB ofthe
HORIZONTAL MODEswitches@)isselected.
13

(§)A TRIGGERINGCOUPLING(ACOUPLING)Selector
Switchand LEDs
SwitchSelects coupling typesoftheA sweep trigger
signal. Everypressofthe• switchadvancesa select-
edLED from left to right insequence.NexttoTV LINE,
AC isselected.(AselectedLEDadvancesatthe inter-
val ofapprox.0.5secondbykeepingpressingthe
switch.)
AC: TheA sweep trigger signalis applied tothe
trigger circuitbyACcoupling.DCcompo-
nent iseliminated.
NOISEREJ: TheA sweep trigger signal with reduced
trigger sensitivityis applied tothe trigger
circuit.
Therefore, trigger signal with noisesmixed
can cause triggering stably.
HFREJ: TheA sweep trigger signalis applied tothe
trigger circuitviaa low-pass filter. Since
high-frequencycomponentsareattenuat-
ed, low-frequencysignalscanbe triggered
stably.
DC: TheA sweep trigger signalis applied tothe
trigger circuitbyDCcoupling,enabling
triggering including DC component.
TV FRAME: Triggeredbytheverticalsynchronizingsig-
nalofthevideosignals.
TV LINE: Triggeredbythe horizontal synchronizing
signalofthevideosignals.
(39) A TRIGGERING LEVEL (A LEVEL) Control
Triggerlevel control ofA sweep. Sets a sweepstart
point ona slopeofthe trigger signalwaveform.
TriggerleveladjustmentisunnecessaryiftheA
COUPLING (§)switchissettoTV FRAME orTV LINE,
or TRIGGERING MODE@ switchesissettoFIX.
(§)A TRIGGERING SLOPE (A SLOPE) Switch
Selects triggering polarity oftheA sweep.Pressingthe
switchturnsontheLEDandselects triggering atthe
trailing edgeof input waveform.Anotherpressofthe
switchturnsofftheLEDandselects triggering atthe
leadingedgeof input waveform.
©TRIGCOUNTSwitch(CS-6020only)
Functionsinthedelayedsweep mode (AINTB,ALT,
orB oftheHORIZONTALMODEswitch (30) isselected).
Pressing theswitchturnsontheLEDanddisplays
COUNT aswellasa count value posterior totheCOUNT
intheupper right oftheCRT.This count valueisset
with the DELAY POSITION control (28) within therange
from 1 to1000.Clockwise rotation ofthe control in-
creases thevalue. Number ofpulsesofa channelselect-
ed with theB SOURCE switch@ is counted from the
point whentheA sweepstarts.Whenthenumberof
pulsesreachesthepresetvalue,theB sweepstarts.
AnotherpressoftheswitchturnsofftheLEDandre-
storesthe triggered delaymode.
@ B TRIGGERINGCOUPLING(BCOUPLING)Selector
Switchand LEDs
Selects coupling typesoftheB sweep trigger signal.
Every pressofthe• switchadvancesa selectedLED
from left to right insequence.NexttoDC,ACisselect-
ed. Fixed, however,toTV LINE ifTV FRAME orTV LINE
oftheA COUPLING switch(§)isselected.(Aselected
LED advancesattheintervalofapprox.0.5secondby
keepingpressingtheswitch.)
SelectionoftheB COUPLING switchpossible only when
theA INTB,ALT,orB oftheHORIZONTALMODE
switches (30) isselected.Insucha case, theprevious
condition isdisplayedontheLED.
IftheA orX-YoftheHORIZONTALMODEswitches
is selected,LEDgoesoutandselectionisdisabled.
14
Fig. 5

AC: TheB sweep trigger signalisappliedtothe
trigger circuitbyACcoupling.DCcompo-
nentiseliminated.
NOISE REJ: TheB sweep trigger signal with reduced
trigger sensitivityisappliedtothe trigger cir-
cuit.Therefore, trigger signal with noises
can cause triggering stably.
HF REJ: TheB sweep trigger signalisappliedtothe
trigger circuitviaa low-pass filter. Since
high-frequencycomponentsareattenuated,
low-frequencysignalscanbe triggered
stably.
DC: TheB sweep trigger signalisappliedtothe
trigger circuitbyDCcoupling,enablingtrig-
geringincludingDCcomponent.
TV LINE: Triggeredbythehorizontalsynchronizing
signalofthevideosignals.
(§)B TRIGGERING LEVEL (B LEVEL) Control
Triggerlevel control ofB sweep. Sets a sweepstart
point ona slopeofthe trigger signalwaveform.Trig-
gerleveladjustmentisunnecessaryiftheB COUPLING
switch(§)issettoTV LINE, or TRIGGERING MODE
switches @ issettoFIX.
®B TRIGGERING SOURCE (B SOURCE) SelectorSwitch
and LEDs
Selects a trigger sourceofB sweep. Every pressofthe
•switchadvancesa selectedLED from left to right in
sequence. Nextto AFT.D, CH1isselected.(Aselect-
edLEDadvancesattheintervalofapprox.0.5second
bykeepingpressingtheswitch.)
CH1: B sweepis triggered bychannel-1vertical axis
input signal.
CH2: B sweepis triggered bychannel-2vertical axis
input signal.
CH3: B sweepis triggered bychannel-3vertical axis
input signal.
CH4: B sweepis triggered bychannel-4vertical axis
input signal.
AFT.D: TheB StartAfterDelaysweepmodeisselect-
ed. B sweepstartsaftera delay time set with
theA SWEEP TIME/DIV@ and DELAY POSI-
TION control (38)has passed.
NOTE: IfanyofCH1toCH4isselected,the
triggered delaymodeisselected:B
sweepis triggered bythefirst trigger
pulseaftera delay time set with theDE-
LAY POSITION control.A question
mark( ? ) isdisplayedposteriortoDE-
LAY ontheCRT.
@ B TRIGGERING SLOPE (B SLOPE) Switch
Selects triggering polarity oftheB sweep. Pressing the
switchturnsontheLEDandselects triggering atthe
trailing edgeof input waveform.Anotherpressofthe
switchturnsofftheLEDandselects triggering atthe
leadingedgeof input waveform.
NOTE: IftheTV FRAME or LINE oftheA COUPLING
switch(§)isselected,theB SLOPE issettothe
same condition astheA SLOPE. IftheA
COUPLING switch(§)issettoanotherone,the
previous condition isrestored.
@ TRIGGERINGMODE(TRIGMODE)SelectorSwitches
and LEDs
Switches and LEDs usedtoselectthe trigger operation
modes.
AUTO/NORM: PressingtheswitchturnsontheLED
andselectstheautomaticmode.Sweep
is triggered bythe trigger signal.Ab-
sence ofthe trigger signal causes free
runninganddisplaysa traceline.
Anotherpressoftheswitchturnsoff
theLEDandselectsthenormalmode.
Sweep is triggered bythe trigger signal.
Different from AUTO, however,notrace
lineisdisplayedifappropriate trigger sig-
nalisprovided.
SINGLE: PressingtheswitchturnsontheLEDand
selects thesinglesweepmode.Inthismode,
theA sweepandB sweepcannotbeobserved
simultaneously.
This switchalso serves astheresetswitchfor
thesinglesweepmode.Toresetsettingofthe
singlesweepmode,presstheAUTO/NORM
switchtosetto AUTO.
READY: Bypressingthe SINGLE switchinthesingle
sweep mode,thereadystateisselectedand
theLEDlightsup,whichremains lighting un-
tilsweepiscompleted.
FIX: PressingtheswitchturnsontheLEDandthe
A sweep trigger levelisfixed.Inthis case, trig-
geringismaderegardlessofA LEVEL control
(§)setting.
AnotherpressoftheswitchturnsofftheLED
andrestoresthenormalcondition.
NOTE: Inthesinglesweepmode,the AREF or
DELAY POSITION, A,***- POSITION,
and SWEEP VARIABLE controlsare
notoperable.Theclockcorrection
modecanalsobeunselectable.
©CarryingHandle
This carryinghandleisfixableatevery 1 5 degreesfor
horizontalor tilted installationoftheinstrument.The
attachedprobeholdershallbeputonthemetal portion
ofthehandle.
15

REAR PANEL
@ Z AXISINPUT Jack
Input oftheexternalintensitymodulation.Positivevol-
tagereducesintensity,and TTL-level voltageactivates
intensitymodulation.
© Fuse HolderandLineVoltageSelector
1.2A fuseis built infor100/120V areas. 0.8A fuse
is built infor200/240V areas.
Before changingthelinevoltagesetting,unplugtheAC
cable. Forlinevoltageselection,refertothemain-
tenance instructionsinthismanual.
(5J) ACConnector
Connector forACpowersupply.
©CableHooks
Used to roll uptheACcablefortransportationor
storage. Also serve asthe base forverticalinstallation.
©CH1OUTPUT Jack
Outputschannel-1verticalsignalbyACcoupling.Used
tomeasurefrequency,etc.byconnectinga counterto
it.Frequencymeasurementusinga countermaybein-
fluencedby noises, resultinginimproperfrequencydis-
play. Insucha case, changethe VOLTS/DIV settingto
anotherrangeorCH1 VARIABLE control @ toa posi-
tion otherthanCAL. Cascade connectionofthe chan-
nel 1 andchannel2 isimpossible.
16
Fig. 6

READOUT DISPLAY
[1]DISPLAYPOSITIONS
The calendar,each scale factor,cursormeasurement
values, etc.aredisplayedinthe following positionsof
theCRT.
Cursor MeasurementValue/
-DelayedSweepTime/
TriggerCountPresetValue(CS-6020only)
A SWEEP TIMEUNCAL
B SWEEP TIMEUNCAL
CH2 Scale Factor
Fig. 7
[2]DISPLAYFUNCTIONS
1 Calendar/Clock
Displays thecalendarandclockvaluesintheorderof
Month, Day, Year, O'clock,and Minute.
Month: JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG,
SEP, OCT,NOV,& DEC
Day: 01to31
Year: 00to99
O'clock:00to23
Minute: 00to59
The abovecanbeset with A andX-YoftheHORIZON-
TAL MODEswitches(§)andthe SWEEP TIME/DIV con-
trol knob.(Refertotheadjustmentinstruction.)
2 CursorMeasurementMode/DelayedSweep Mode
Displays thecursormeasurementmodedependingon
combination ofthe CURSORS and VARIABLE control
setting.
AV1,AV2, AV3, AV4, AT, MAT, RATIO, PHASE
The delayedsweepmodeisalsodisplayedinthesame
position.
Triggereddelay: DELAY?
Continuousdelay: DELAY
Triggercount:COUNT
3 CursorMeasurementValue/DelayedSweepTime/Trig-
gerCountPresetValue(CS-6020only)
Inthecursormeasurement,a measuredvalueusingtwo
cursors isdisplayed.
IntheMAT measurement,a "1" isdisplayedbeforethe
cursormeasurementvaluetoindicate that themeas-
uredvalueisinvalid,whentwocursorsgetclosetoeach
other andmeasurementreachesthe limit.
Inthedelayedsweep,delayedsweep time isdisplayed.
Inthe trigger count,"acountedvalueisdisplayed.
4 CHI Scale Factor
Displays thechannel-1vertical axis sensitivityfor1 div.
IntheUNCAL condition, a">" isdisplayedbeforethe
channel-1vertical axis sensitivity.Ifchannel1 is
grounded,however,a " " markisdisplayedbutno
">" isdisplayedevenintheUNCAL condition.
Ifthe AC-DC switchissettoACforchannel1,a " ~ "
markisdisplayedabovethe unit ofthevertical axis sen-
sitivity.
NOTE: Nodisplayis provided unless CH1 orADDofthe
VERTICAL MODEswitches® isselected.
17
Cursor Measurement Mode /
DelayedSweep Mode
Calendar/Clock
i
CH1 Scale Factor
B Sweep Scale Factor
ASweep Scale Factor
CH4 Scale Factor
CH3 Scale Factor
CH2 UNCAL
CH2 GND
cmUNCAL
CH1GND
ADD
CH2 INVERT
BWL

5 CH2ScaleFactor
Displaysthechannel-2verticalaxissensitivityfor1 div.
IntheUNCAL condition, a " > " isdisplayed before the
channel-2verticalaxissensitivity.Ifchannel-2is
grounded, however, a"rfr " markisdisplayedbutno
">"isdisplayedevenintheUNCAL condition.
IftheAC-DCswitchissettoACforchannel2,a " ~ "
markisdisplayedabovethe unit oftheverticalaxis sen-
sitivity.
NOTE: Nodisplayis provided unlessCH2orADDofthe
VERTICAL MODEswitches© isselected.
However,ifX-YoftheHORIZONTALMODE
switches© isselected,displayis provided,
regardlessof VERTICAL MODEsetting.
6CH3ScaleFactor
Displaysthechannel-3verticalaxissensitivityfor1 div.
NOTE: Nodisplayis provided unlessCH3ofthe VER-
TICAL MODEswitches© isselected.
7CH4ScaleFactor
Displaysthechannel-4verticalaxissensitivityfor1 div.
NOTE: Nodisplayis provided unlessCH4ofthe VER-
TICAL MODEswitches© isselected.
8ADD
Displaysa" + " markifADDofthe VERTICAL MODE
switches© isselected.
9CH2 Invert
Displaysa " \ " markifCH2INVofthe VERTICAL
MODEswitches© isselected.
10A SweepScaleFactor
Displaysa rangeoftheA sweepset with the SWEEP
TIME/DIV control ©.
Displaysa ">" before theA sweeprangeiftheA
SWEEP TIME/DIV control © issettotheUNCALcon-
dition.
11B SweepScaleFactor
Displaysa rangeoftheB sweepset with the SWEEP
TIME/DIV control ©.
Displaysa ">" before theB sweeprangeiftheB
SWEEP TIME/DIV control © issettotheUNCALcon-
dition.
NOTE: IfX-YoftheHORIZONTALMODEswitches©
is selected,A andB scalefactorsdisappearand
"CH2-X" isdisplayed.
18

OPERATING INSTRUCTIONS
INITIALSTARTING PROCEDURE
Priorto turning onpower,seteach control asshownabove
inadvance.Settingofotherswitchesandcontrolsinthe
poweroff condition hasnorelation with operation.Forde-
tailsofswitchesandcontrols,refertosection "CONTROLS
AND INDICATORS".
Priortousingtheprobe,read through themanualattached
toitaswellas"ProbeCompensation"inapplicationex-
amples inthismanual.
CAL (full clockwise)
PowerOFF
Push and
set tocenter
Push andset
tocenter
Push and full
counterclockwise
rotation
To6 o'clock
position
[1]NORMAL SWEEP DISPLAY
1. Pressingthe POWER switch0 turnsonpower. LEDs on
the front panel light inthesamesettingbefore turning
offpower.
Then, seteachmodeasfollows:
VERTICAL MODE®: CH1
CURSORS ©:Alloff
HORIZONTAL MODE®:A
A SOURCE©: VERT (CH1)
A COUPLE (§):AC
A SLOPE (40): +
TRIG MODE(§):AUTO(FIXgoesout.)
x10MAG@:Off
CH1, 2 AC-DC ©,©:AC
CH1, 2 GND©,©:Off
2. ThetracelineappearsintheCRTcenter.Ifitisnotin
thecenter,adjustittothecenter with the• POSITION
®and^ • POSITION control (§).
Then, adjustintensity with INTENSITY control (§).Also
adjustfocus with the FOCUS control ® ifnecessary.
3. SupplysignaltotheCH1 input connector(§),andcon-
trol theCH1 VOLTS/DIV @ and SWEEP TIME/DIVcon-
trol © so that waveformofa proper size isdisplayed.
By pressingCH2ofthe VERTICAL MODEswitches@
andsupplyingsignaltotheCH2 input connector®,
channel-2 input signalisdisplayedonthe CRT inthesame
manneraschannel-1.
Channel-3 andchannel-4signalscanbedisplayedonthe
CRT inthesamemanner.
By pressingADDofthe VERTICAL MODEswitches@,
compositewaveformofchannel-1andchannel-2signals
(algebraicsumofthem)isdisplayedontheCRT.By
selectingCH2INVunderthisstate,algebraicdifference
Center Center
ofchannel-1andchannel-2signals(CH1- CH2)isdis-
played.
SensitivityoftheADDmodeequalsthesetvalueofthe
VOLTS/DIV control iftheCH1 VOLTS/DIV andCH2
VOLTS/DIV aresettothesamevalue.
IfALTofthe VERTICAL MODEswitches© isselected,
every sweepoperationdisplaysselectedchannelsofCH1
toCH4andADDalternately.
4. Ifwaveformtobeobservedcannotbe triggered dueto
waveringorthe trigger point istobemoved,carryout
trigger adjustmentdescribedbelow.
TriggerOperation
For waveformobservationof input signal,thesweepcir-
cuitmustbe triggered properlyto obtain stationary
waveform.
(1)TRIGGERINGMODESwitches
a) AUTO
IfAUTOofthe TRIG MODEswitches(§)isselect-
ed, thesweepcircuitrunsfreewhenno trigger sig-
nalissupplied,facilitatingconfirmationoftheGND
level, etc.
Ifthe trigger signalissupplied,theAUTOmodeal-
lowsthe trigger point tobeset with the LEVEL and
SLOPE forobservation,likethenormal trigger oper-
ation.Thesweepcircuitalsorunsfreewhenthe
trigger point exceedsthe trigger range,resulting
inwaveringofwaveform.
NOTE: TheAUTOsweepmodecannotbe triggered
iffrequencyof input signalislowerthan50
Hz. Forsuchsignals,usethenormalsweep
mode.
19
CAL (full clockwise)
Center
Center
-NORM
•Full clockwise
Center Center
Fig. 8

b) NORMAL
The normalsweepmodeallowsthe trigger point
tobeset with the LEVEL and SLOPE, liketheAUTO
sweep mode.Itisusedtoobserve input signalsof
frequencylowerthan50Hzaswellassignals with
low repetition frequency.
NOTE: Ifno trigger signalissuppliedorthe trigger
point exceedsthe trigger rangeinthenor-
malsweepmode,sweepoperationdiscon-
tinuesandnotracelineisdisplayed.
with noises,thismodeprovidesstabletriggering,
c) HFREJ
Triggersignalissuppliedtothe trigger circuitvia
a low- pass filter tocutoffhigh-frequencycompo-
nents(higherthan30kHz). Thus, triggering isdone
bylow-frequencycomponentsonly.Thismodepro-
vides stable triggering for trigger signals with over-
lappedhigh-frequencynoisesasshowninFig.9.
c) SINGLE
The singlemodeisusedforphotographyofnon-
cyclic waveformbysweepingitonce.
Select AUTOorNORMofthe TRIG MODEswitches
©, input a signal with approx.thesameamplitude
andfrequencyasthesignaltobedisplayedasthe
trigger signal,andsetthe trigger level.
Press the SINGLE ofthe TRIG MODEswitches(§).
Once SINGLE isselected,thereadoutvaluesand
scale illumination disappear.Pressingthe SINGLE
turnsonthe READY LED,whichindicatesthein-
strumentisreadyforthe trigger signal.ThisLED
goesoutoncompletionofA sweep.Afterconfirm-
ingtheabove,applythesignaltobeobservedand
press the SINGLE tomaketheinstumentreadyfor
the trigger signal.Sweepoperationisexecuted
oncewhenthe trigger signalisapplied,andthen
the READY LEDgoesout.Atthistime,thereadout
values aredisplayedandthe scale illumination
lightsupinstantaneously.
NOTE: Ifseveralchannelsareselected with the
VERTICAL MODEswitches@,theycannot
beobservedintheALTmode.Setthe
CHOP/ALT switchto CHOP insucha case.
(2) SOURCE
Triggersignaltobeusedisselected with theA SOURCE
switches ©.IftheA SOURCE switchissetto VERT,
triggering ismadebya signalofa lowerchannelnum-
berselected with the VERTICAL MODEswitches@.
IfanyofCH1toCH4oftheA SOURCE isselected,trig-
geringismadebythesignaloftheselectedchannel,
regardless ofsettingofthe VERTICAL MODEswitches
©•
IftheA SOURCE switchissetto LINE, triggering is
madebythecommercialfrequency.
(3) COUPLE Switch
The A COUPLING switches (38) isusedtoselectcoupling
methodsofthe trigger signal.
a) AC
Selects AC(capacitive)coupling.DCcomponent
inthe trigger signaliseliminated,and triggering is
donebyACsignals.Thiscouplingisconveniently
used forordinarymeasurementsinceitprovides
stable triggering independentofDCcomponent.
However,iffrequencyofthe trigger signalislow-
er than20Hz, trigger signallevelisreduced, caus-
ing difficulty intriggering.
b) NOISEREJ
Triggersignal with reduced trigger sensitivityis
suppliedtothe trigger circuit.For trigger signals
Waveform with overlappedhigh-frequencynoises
Triggersignalin HFREJ mode
d) DC
Triggersignaland trigger circuitarecoupleddirect-
ly,enabling triggering from directcurrent.This
modeissuitablefor triggering oflow-frequency sig-
nals lowerthan20Hzorrampwaveform with slow
repetition orchangelikethedirectcurrent.
e) TV FRAME, TV LINE
To observethevideosignals,settingtheA
COUPLING © toTV FRAME causes thevertical
synchronizingsignalto trigger, andsettingtoTV
LINE causes thehorizontalsynchronizingsignalto
trigger. These triggering operationsarestable,
regardless ofsettingoftheA LEVEL (39). If polarity
ofthesynchronizingpulsesisnegative,settheA
SLOPE ® tonegative(-).Ifitispositive,setthe
A SLOPE © topositive(+ ).
IfA INTB,ALT,orB oftheHORIZONTALMODE
switches © isselected,theB COUPLING © isau-
tomaticallysettoTV LINE.
Besides, theB SLOPE issettothesamestateas
theA SLOPE.
Set the SLOPE asfollows:
SLOPE
+ SLOPE
Fig. 10
20
Fig. 9