Kenwood CS-3035 User manual

20MHz COMPACTOSCILLOSCOPE
CS-3035
INSTRUCTIONMANUAL
KENWOOD CORPORATION
©PRINTEDINJAPANB50-7681-00(T)
90/1211109 8 7 6 5 4 3 2 1 89/12 11 109 8 7 6
KENWOOD

SAFETY
Symbol in This Manual
fi\ This symbolindicateswhereapplicablecautionaryorotherimformationistobefound.
Power Source
This equipmentoperates from a powersourcethatdoesnotapplymorethan250V rms
betweenthesupplyconductorsorbetweeneithersupplyconductorandground.A pro-
tectivegroundconnectionbywayofthegroundingconductorinthepowercordis essen-
tialfor safe operation.
Grounding theProduct
This equipmentisgrounded through thegroundingconductorofthepowercord.Toavoid
electrical shock,plugthepowercord into a properlywiredreceptaclebeforeconnecting
totheequipment input or output terminals.
Use theProperPowerCord
Use onlythepowercordandconnectorspecifiedforyourproduct.
Use theProper Fuse
To avoidfirehazard,usea fuseofthecorrecttype.
DonotOperatein Explosive Atmospheres
To avoidexplosion,donotoperatethisproductinanexplosiveatmosphere.
DonotRemoveCoverorPanel
To avoidpersonalinjury,donotremovethecoverorpanel. Refer servicingtoqualified
personnel.
VoltageConversion
Ifthepower source isnotappliedtoyourproduct,contactyourdealer.Toavoidelectrical
shock, donotperformthevoltageconversion.
2

CONTENTS
SAFETY 2
OVERVIEW ANDCONFIGURATION4
SPECIFICATIONS 5
/j^ PREPARATIONFORUSE7
CONTROLSANDINDICATORS9
FRONTPANEL9
SIDE PANEL;13
REAR PANEL14
TOP CASE SURFACE 15
OPERATION: 16
INSTALSTARTINGPROCEDURE16
[1] NORMAL SWEEP DISPLAYOPERATION16
[2]MAGNIFIED SWEEP OPERATION19
[3]X-YOPERATION19
APPLICATION20
PROBE COMPENSATION20
TRACE ROTATIONCOMPENSATION20
DCVOLTAGEMEASUREMENTS20
MEASUREMENTOFTHEVOLTAGEBETWEENTWOPOINTSONA WAVEFORM21
ELIMINATION OFUNDESIREDSIGNALCOMPONENTS22
TIMEMEASUREMENTS23
FREQUENCY MEASUREMENTS ....24
APPLICATIONOFX-YOPERATION25
MAINTENANCE27
/j\ MAINTENANCE27
3

OVERVIEW ANDCONFIGURATION
Overview
This unit isa compact,light-weight,highperformanceportableoscilloscopeequipped with
rectangular CRT with internalgraticule.
The frequencybandwidthof20MHzandselectablesweeptimeof0.2/is/divto1 s/div
forthevertical axis allowsusefora widerangeofapplications.Itisalsoequipped with
magnificationfunctionsfortheverticalandhorizontal axis, HFREJ functionallowing sta-
ble triggering with highfrequencycomponentsblocks,andoptionalDCpowersupplyfor
fielduse. These featuresmakeittheidealoscilloscopeforon-siteservicingandmain-
tenance.
Configuration
The following itemsare containedinthepacking case. Whenunpacking,makesurethat
all itemshavebeenincluded.
Oscilloscope 1 pc.
Probe (PC-30) 2 pes.
Panel cover1 pc.
Instructionmanual1 pc.
Replacement fuse0.3A 2 pes.
0.5 A 2 pes.
Inaddition,the following arealsoavailableasoptional accessories (soldseparately).
DC powersupply (BP-70)
Carrying case (soft)MC-81
Carrying case (hard)MC-82
Carrying case (hard)MC-83(forusewhenDCpowersupplyisattached)
4

SPECIFICATIONS
CRT
Type RectangularhighluminanceCRT(withinternal
graticule)
Acceleration VoltageApprox.1.8kV
Display Area 8x10divflat-face(1div= 6.35mm)
VERTICAL AXIS
OperatingModes CH1, CH2,ALT, CHOP, ADD
Sensitivity 5 mV/divto5 V/div,+1-3%
Sensitivity Magnification...5times+/-5%(x5MAGused)
Attenuator1-2-5stepsequence,10ranges,adjustablebetween
ranges
Frequency Response
5 mV/divto5 V/div...DC:DCto20MHz,-3dB
AC: 5 Hzto20MHz,-3dB
x5 MAGusedDC:DCto4 MHz,-3dB
AC: 5 Hzto4 MHz,-3dB
InputImpedance1 Mohm,approx.40pF
Rise Time17.5nsor less (20MHz)
Crosstalk -40dBminimum
Polarity InversionCH2only
Chop FrequencyApprox.50kHz
AMaximumInputVoltage800Vp-por400V (DC + AC peak)
HORIZONTAL AXIS
OperatingModesX-Yoperationselectable with sweepknob
CH1:Xaxis CH2:Y axis
Sensitivity Same asvertical axis (CH1)
InputImpedance Same asvertical axis (CH1)
Frequency Response DC:DCto200kHz,-3dB
AC: 5 Hzto200kHz,-3dB
X-Y Phase Difference3°or less at10kHz
/^MaximumInputVoltage Same asvertical axis (CH1)
5

SWEEP
Sweep TypeNORM: Triggering sweep
AUTO: Sweepfreerunsinabsenceof trigger
SINGLE: Singlesweep
Sweep Time0.2/xs/d'w to1 s/div+/-3%in21ranges,1-2-5se-
quence,adjustablebetweenranges
Sweep Magnification 5 times+/-5%(x5MAGused)
TRIGGERING
Internal Sync INT, LINE
External Sync EXT
External Sync Input
Impedance1 Mohm, 40pFor less
^ Maximum ExternalTrigger
Input Voltage 50V (DC+ ACpeak)
Sync Coupling AC, HFREJ, DC
Polarity+/-
TriggerSensitivity Coupling Frequency
Amplitude (Voltage)
Coupling Frequency INT
EXT
DC DC~2MHz
-20MHz 0.5div
1div 0.1Vp-p 0.2Vp-p
HFREJ
Attenuation at more than 1.5kHz
AC
10Hz~2MHz
-20MHz 0.5div
1div 0.1Vp-p. 0.2Vp-p
AUTO:Sameasabovespecificationforabove50Hz.
CALIBRATIONVOLTAGESquarewave(positive polarity)
0.25Vp-p±2%,1 kHz±2%
POWERREQUIREMENTS
PowerSupply Voltage AC 100/120/220/240V ±10%216V-250V 50/60Hz
Power Consumption Approx. 22W (at100V AC)
DIMENSIONSANDWEIGHT
Dimensions216 (width) x 89(height)x 298(depth)mm
Weight Approx. 4 kg
OPERATINGTEMPERATUREAND HUMIDITY FORGUARANTEEDSPECIFICATIONS
5 to35°C,85%maximumRH
ACCESSORIES Probe (PC-30) 2 pes.
Panel Cover1 pc.
Instruction Manual1 pc.
PowerCord1 pc.
Fuse (0.5A)2 pes.
(0.3 A)2 pes.
6

PREPARATION FORUSE
SAFETY
Before connectingtheinstrumenttoa powersource,carefullyreadthe following infor-
mation,thenverifythattheproperpowercordisusedandtheproperlinefuseisinstalled
forpower source. Thespecifiedvoltageisshownatthe left sideofthepowercordon
therearpanel.Ifthepowercordisnotappliedforspecifiedvoltage,thereis always a
certain amountofdanger from electricshock.
Line voltage
This instrumentoperatesusingAC-power input voltagesthat 100/120/220/240 V atfre-
quencies from 50Hzto60Hz.
Power cord
The groundwireofthe3-wireACpowerplug places the chassis andhousingofthe oscil-
loscope atearthground.Donotattempttodefeatthegroundwireconnectionorfloat
theoscilloscope;todosomayposea greatsafety hazard.
The appropriatepowercordissuppliedbyan option thatisspecifiedwhentheinstrument
is ordered.
The optionalpowercordsare shownasfollowsinFig.1.
Line fuse
The fuseholderislocatedontherearpanelandcontainstheline fuse. Verifythatthe
properfuseisinstalledbyreplacingtheline fuse.
EQUIPMENT PROTECTION
1. Neverallowa smallspotofhighbrilliancetoremainstationaryonthe screen formore
thana few seconds. The screen maybecomepermanentlyburned.A spotwilloccur
onlywhenthescopeissetupfor X-Y operationandnosignalisapplied.Eitherreduce
theintensitysothespotisbarely visible, switchbacktonormalsweepoperationwhen
nosignalisapplied,orsetupthescopeforspotblanking.
2. Nevercovertheventilatingholesonthetopoftheoscilloscope,asthiswill increase
theoperatingtemperatureinsidethe case.
3. Neverapplymorethanthemaximumratingtotheoscilloscopeinputs.
^ CH1, CH2 INPUT jacks:
800 Vp-por400V (DC + AC peak)
EXT TRIG INPUT jack:
50 V (DC + AC peak)
Never applyexternalvoltagetotheoscilloscope output terminals.
4. Always connecta cable from theearthground(GND)terminaloftheoscilloscopeto
the chassis oftheequipmentundertest. Without thiscaution,theentirecurrentfor
theequipmentundertestmaybedrawn through theprobeclip leads undercertaincir-
cumstances. Such conditionscould also posea safety hazard, whichthegroundcable
willprevent.
5. Always use theprobegroundclipsforbest results. Donotuseanexternalgroundwire
inlieuoftheprobegroundclips,asundesiredsignalsmaybeintroduced.
7

6. OperationadjacenttoequipmentwhichproducesstrongACmagneticfieldsshouldbe
avoidedwherepossible.
This includessuch devices aslargepower supplies, transformers,electricmotors,etc.,
thatare often found inanindustrialenvironment.Strongmagneticshieldscanexceed
thepractical CRT magneticshieldinglimitsandresultinterferenceanddistortion.
7. Probecompensationadjustmentmatchestheprobetothe input ofthe scope. Forbest
results, compensationofprobeshouldbeadjustedinitially,thenthesameprobeal-
ways used with the input of scope. Probecompensationshouldbereadjustedwhenever
a probe from a differentscopeis used. (Seepage20)
8. In X-Y operation,donot pull outthe PULLx 5 MAGswitch.Ifpulledoutit,noisemay
appeare onthewaveform.
Plug configuration
Power cord
and plugtype
Factory installed
instrumentfuse
Line cordplugfuse
North American
120volt/60Hz
Rated 15amp
(12ampmax;NEC)
0.5A,250V
Fast blow
AGC/3AG
None
Universal Europe
220volt/50Hz
Rated 16amp
0.3A,250V
Fast blow
5x20mm
None
U.K.
240volt/50Hz
Rated 13amp
0.3A,250V
Fast blow
6x30mm
0.3A
Type C
Australian
240volt/50Hz
Rated 10amp
0.3A,250V
Fast blow
6x30mm
None
North American
240volt/60Hz
Rated 15amp
(12ampmax;NEC)
0.3A,250V
Fast blow
AGC/3AG
None
Switzerland
240volt/50Hz
Rated 10amp
0.3A,250V
Fast blow
AGC/3AG
6x30mm
None
Fig. 1 PowerInputVoltageConfiguration
8

© POWER
Power switchfortheoscilloscope. Pressing this control onceturnsthepoweronand
pressing itagainturnsthepoweroff.
(DPilotLamp
Lamp lightswhentheoscilloscopeison.
(3) CALTerminal
Voltageterminalforcalibrationofprobes.Providesanapproximately 1 kHzsquarewave
at0.25V with positivepolarity.
D$ POSITION/PULL x 5 MAG
Rotationadjuststhevertical position ofchannel 1traceonthedisplay.Pullingthisknob
increases thevertical axis sensitivity5 times.
© VOLTS/DIV
Sets thevertical axis sensitivityusingtheverticalattenuatorforchannel1. This knob
can beswitchedina 1-2-5 sequence. Settingthe VARIABLE knob (6) totheCALposi-
tion providescalibratedvertical axis sensitivity.
DuringX-Yoperation,this control serves astheattenuatorfortheX axis.
© VARI (ABLE)
Rotationprovidesfine control ofchannel1verticalattenuation.Allowscontinuousad-
justmentbetween VOLTS/DIV ranges.Inthe fully clockwise (CAL) position,theverti-
cal attenuatoriscalibrated.DuringX-Yoperation,this control serves astheX axis
attenuatorfineadjustment.
9
CONTROLS ANDINDICATORS
FRONT PANEL
Fig. 2-1

(7) AC-GND-DC
This leverselectsthecoupling method usedfortheCH1vertical axis input signal.
AC: Input signalisACcoupled,andDCcomponentisblocked.
GND: Input signalandverticalamplifierareseparatedand input toverticalamplifier
is grounded.Thisallowsforconfirmationofthe ground potential.
DC: Input signalisDCcoupledallowingformeasurementincludingDCcomponent.
This leverserversastheX axis input selector during X-Yoperation.
®CH1 or[x|INPUT
Vertical axis input jackforchannel1. Serves astheX axis input jack during X-Y
operation.
(9) VOLTS/DIV
Vertical axis attenuatorforchannel2.Performsthesame function forchannel2 as
thechannel1 VOLTS/DIV control. Serves astheX axis orY axis attenuationadjust-
ment control during X-Yoperation.
©VARI (ABLE)
Rotationprovidesfine control ofchannel2 attenuation.Performsthesame function
forchannel2 asthechannel1 VARIABLE control. Serves astheY axis attenuation
fineadjustment control during X-Yoperation.
©AC-GND-DC
This lever selects thecoupling method usedforthechannel2 vertical axis input signal.
Performsthesame function as thechannel1 AC-GND-DC control. Serves as theY axis
input selector during X-Yoperation.
© CH2 or[Y]INPUT
Vertical axis input jackforchannel2. Serves astheY axis input jack during X-Y
operation.
10
Fig. 2-2