ScienTECH Caddo 4065 User manual

10MHzFunction-Pulse-DataGenerator
WithFrequencyCounter
Caddo4065
OperatingManual
Ver.1.1
AnISO9001:2000company
94-101,ElectronicComplexPardesipura,
Indore-452010,India
Tel:[phone]
Fax:[phone]
email : [e-mail]
Website: www.scientech.bz
Toll free :1800-103-5050

Caddo4065
ScientechTechnologies Pvt.Ltd.2

Caddo4065
ScientechTechnologies Pvt.Ltd.3
RoHSCompliance
ScientechProductsareRoHSComplied.
RoHSDirectiveconcernswiththerestrictiveuseofHazardoussubstances(Pb,
Cd, Cr,Hg, Brcompounds)inelectricandelectronicequipments.
Scientechproductsare“LeadFree”and“EnvironmentFriendly”.
Itismandatorythatservice engineersuseleadfree solderwireandusethe
soldering ironsupto(25 W)thatreachatemperatureof450°Catthetipasthe
melting temperatureoftheunleadedsolderishigherthantheleadedsolder.
10MHzFunction-Pulse-DataGenerator
WithFrequencyCounter
Caddo4065
TableofContents
1. SafetyInstruction 4
2. Features5
3. TechnicalSpecifications6
4. Introduction8
5. FrontPanelControls10
6. OperatingInstructions12
•GeneralInformation
•Safety
•Operating Conditions
•FirstTimeOperation
•Operating Principle
•100%Calibration
•FrequencyAlignment
•SignalOutput
•Modulation
7. Warranty15
8. ListofAccessories15

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ScientechTechnologies Pvt.Ltd.4
SafetyInstructions
Readthefollowingsafetyinstructionscarefullybeforeoperatingtheinstrument.To
avoidanypersonalinjuryordamagetotheinstrumentoranyproductconnectedtoit.
Donotoperatetheinstrumentifsuspectanydamagewithin.
Theinstrumentshouldbeservicedbyqualifiedpersonnelonly.
Foryoursafety:
Useproper Mainscord: Useonlythemainscorddesignedforthisinstrument.
Ensurethatthemainscordissuitableforyour
country.
Ground theInstrument: Thisinstrumentisgroundedthroughtheprotective
earthconductorofthemainscord.Toavoidelectric
shockthegrounding conductormustbeconnectedto
theearthground.Beforemakingconnectionstothe
inputterminals,ensurethattheinstrumentisproperly
grounded.
ObserveTerminalRatings: Toavoidfireorshockhazards, observeallratingsand
marksontheinstrument.
Useonlytheproper Fuse: Usethefusetypeandratingspecifiedforthis
instrument.
Useinproper Atmosphere: Pleaserefertooperatingconditionsgiveninthe
manual.
1. Donotoperateinwet/damp conditions.
2. Donotoperateinanexplosiveatmosphere.
3. Keeptheproductdustfree, cleananddry.

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Features
•Sine,Square,Triangle, Ramp PulseTTL &BinaryDataOutput
•1Hzto10 MHzFrequencyRange
•20VppSignalOutput
•AMBalance, AMStandard,FM, ASK,FSK&PWMModulation
•InternalModulationGenerator
•InternalSweep
•DC Offset
•BinaryDataOutput
•TTL Output
•20dB&40dBFixed&20 dBVariableAttenuation
•LCD ControlledbyMenuKeys
•Rise&FallTime ≤50ns
•LowDistortion
•Compact&Lightweight

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ScientechTechnologies Pvt.Ltd.6
TechnicalSpecifications
OperatingModes: Sine,Square,Triangle,Ramp,Pulse,TTL, andBinary
Data
FrequencyRange: 1Hz -10MHzSinewave
1Hz -2MHzothers
FrequencyAccuracy: ± 0.5%
SinewaveDistortion: 1.0%(2MHz)
2.0%(10MHz)typical
Square wave/Pulse
Rise&Falltime: 50ns
PulseDutyCycle: 15%-85%variation(minimumwidth200ns)
TriangleNon-Linearity: 1%(typical)
FrequencyDisplay: LCDcontrolledbymenukeys
Outputimpedance: 50Ω
OutputVoltage: 10Vppinto50Ω,20Vpp(OpenCircuited)
Attenuation: 20dB,40dB,(20dBvariableinbetween)
LevelFlatness :± 0.5dB(2MHz),
± 1.5dB(10MHz)typical
DC Offset: ± 5V(approximately)adjustable
InternalSweep: 20ms–4svariable
Modulation: AMBalance,AMStandard,FM,ASK,FSK&PWM
Modulation
ModulationFrequency: DC–20KHz
Range

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FrequencyCounter :
FrequencyRange: DCto40 MHz
Resolution: 1Hz
Sensitivity: 0.5Volts
FrequencyAccuracy: ± 0.5%
FrequencyDisplay: LCDcontrolledbymenukeys
InputImpedance : 1MΩ
Maximum InputVoltage: 200V(DC+ACPeak)
PowerSupply: 230VAC± 10%, 50Hz
FuseRating:T150mA
PowerConsumption: 19VA(approximately)
OperatingConditions: 0-40°C,95%RH
Dimensions(mm): W262xH316xD130
Weight: 3Kgs. (approximately)
(SubjecttoChange)

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Introduction
Thenew 10MHzFunction-Pulse-DataGeneratorCaddo4065 isaversatile
instrumenthaving AM-FMandothermodulationfacility.Anyoftheoutput
waveformscanbemodulatedwiththeexternalinputsignal.ThepulseandPWM
outputisaspecialfeaturewhichwill findapplicationinmostASK,FSK&PWM
applications.Avariablefrequencycontrolfacilitatesaccuratefrequency
measurement.Thedistortioniskeptwithin2%formajorityofthefrequencyranges.
Theinternalsweepmodeisprovidedforresponsemeasurement.Frequenciesare
displayedinabrightDucklitLCDdisplaycontrolledbymicrocontroller.
Outputcanbeattenuatedaslowas60dB,giving aminimumof20mVlevel.The
squarewaveriseandfalltimeiswithin50ns,thusgivingyouverygood squarewave
evenat2MHz.StandardAM, balancedAM,FMASK,FSK&PWMmodulation
whicharetaughtintheclassroomcanbedemonstratedveryeasilytothestudents
using10MHz Function-Pulse-DataGenerator Caddo4065 internalorexternal
modulation.

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ScientechTechnologies Pvt.Ltd.9
FrontPanelControls
1Power: Push-buttonswitchtosupplypowertotheinstrument.
2LCD Display: 24x2Characterbrightbacklitliquidcrystaldisplay.
3MenuBlock: ThisblockcontainsfourswitchesusedforUpkey,Downkey,
EnterkeyandBack(Esc)keyforselectionoffrequency,function,attenuation,
modulation, modulatinggenerator,externalcounterandserialdata.
4&5UpKey&DownKey: Usedforselectionofparametersandstepvariable
forselectedparameters.
6&7Enter Key&BackKey: Usedforselectionofparticularparameterand
comeoutfromselectedparametertoMenu.
8Sweeprate: Controlprovidedtovaryinternalsweep.Wheninternalsweep
functionisselectedthiscontrolsthevariationofsweepisbetween20ms-4s.
9DutyCycle: Whenpulseoutputfunction isselectedthiscontrolsthepulseduty
cyclefrom15%to85%.
10 FrequencyVariable: Inconjunctionwithfrequencyrange,selectedbyMenu
keyonLCDdisplay.
11 AmplitudeVariable: Inconjunctionwithattenuators, selectedbyMenukeyon
LCDdisplay.
12 DC Offset: ThiscontrolprovidesDCoffset.Approximately±5VDCis
superimposedontheoutput.Keepthecontroloff ifDCoffsetisnotrequired.
13 SerialOutput(BNCconnector): Outputofserialbinarydatageneratorwhen
serialmodeisselectedbymenukeysonLCDdisplay.
14 ExternalCounter(BNC connector): InputBNCconnectorformeasurethe
frequencyofexternalsignalwhenEXTCmodeisselectedbymenukeyson
LCDdisplay.

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15 Output(BNCconnector): Outputof10 MHzfunctiongeneratori.e.20Vpp
(OpenCircuited)
16 ModulationGeneratorLEDIndicator: LED‘On’, whenMODG (modulation
generator) selectedonLCDbymenukeys.
17 AmplitudeVariable: To controlthelevelofmodulationgenerator.
18 FrequencyVariable: Frequencyvariableformodulationgenerator.
19 ModulationInput: BNCterminalprovidedtofeedmodulationsignalfor
modulation, selectedonLCD.
20 ModulationGeneratorOutput: Outputofmodulationgeneratori.e. 2Vpp.

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OperatingInstructions
GeneralInformation:
Thelogicalfrontpanellayoutof Caddo4065 makesit easytobecomefamiliarwith
theoperationoftheinstruments.However,evenexperiencedusersshouldreadthe
followinginstructionsthoroughlybeforeusingtheinstrument.
Afterunpacking theinstrument,checkforanymechanicaldamageorlooseparts
inside.Shouldtherebeanytransportationdamage,informthesupplierimmediately
anddonotputtheinstrumentintooperation.
Safety:
Thecasechassisandallmeasuringpartsareconnectedtotheprotectiveearthcontact
oftheinlet.Themainsplugshallonlybeinsertedinasocketoutletprovidedwitha
protectiveearthcontact.Theprotectiveactionmustnotbenegatedbytheuseofan
extensioncordwithoutaprotectiveconductor.
Warning!
Anyinterruptionoftheprotective conductorinsideoroutsidetheinstrumentor
disconnection oftheprotectiveearthterminalislikelytomaketheinstrument
dangerous.Intentionalinterruptionisprohibited.Themains/lineplug shouldbe
insertedbeforeconnectionsaremadetomeasuringcircuits.
Whenremovingthemetalcaseorreplacing,theinstrumentmustbecompletely
disconnectedfromthemainssupply. Ifanymeasurementorcalibrationproceduresare
unavoidableontheopened-up instrument,thesemustonlybecarriedoutbyqualified
personnelacquaintedwiththedangerinvolved.
OperatingConditions:
Theambienttemperaturerangeduring operationshouldbebetween+0°-48°C;90%
RHandshouldnotexceed-20°Cto+70°Cduring transportorstorage. Theoperational
positionisshouldbenormal. However;theventilationholesonthe Caddo4065 must
notbeobstructed.Priortocalibrationapreheatrunofapproximately30minutesis
required.

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FirstTimeOperation:
Afterunpackingtheinstrumentcheckforanymechanicaldamages.Theinstrument
shouldbepluggedinmains-plugofpropermainssupply230V±10%.Switch‘On’
theinstrument, thepower‘On’isindicatedbylighting ofdisplays.
FunctionSelection(Function):
Thetypeofoutputsignalisselectedwiththemenublock (3). Atotalnumber6
differentwaveform- sine,squareandtriangle,ramp,Pulseand TTL areavailable.
Thefunctionsaremarkedwiththecorresponding symbols.
FrequencyAdjustment(frequency):
Coarseadjustmentisperformedwiththemenublock (3) dividedintodecades.The
desiredfrequencyisselectedbyturningthe Variable control.Theselectedfrequency
appearsontheLCD (2), comparedtoanalogknobscalesthisdisplayhasamuch
higherresolution.
SignalOutput:
ConnectaBNC-BNCcableattheoutputandotherendtooscilloscope.Keepboth
attenuators(20 &40dBinreleasedposition).Adjustthedesiredoutputwiththehelp
ofamplitudevariable (11) andattenuator.Thegeneratorprovidesamaximum of
20Vppandminimumof2mVpp (approximately)output. Itisrecommendedtousethe
terminatedcable(50Ω)forobserving squarewaveorpulsestoreduceovershootand
ringingetc.With50Ωterminationthemaximum outputis10Vpp.
InternalModulationGenerator(MODG):
Internalmodulationgeneratorprovidesreadytousemodulationinputformain
generator.Whenin sine,squareortriangle selectmodethegeneratorgetsinternally
connectedtothemodulationinputofmaingenerator.Inextselecttheexternalinput
canbegiven.
Modulation(MOD):
The Caddo4065 has6typesofmodulationcapabilities.Theusercanselectthe
modulationfunctiondesired,bymenublock. Ifnomodulationisdesired,keepthisin
‘Off’position.
ThemodulationsignalistobefedtoModulationInputBNC (19),depending on
choiceofmodulation, withvoltagelevelnotexceeding10Vpp and2Vpprespectively.
Theusercanselectwhethertouseinternalorexternalmodulationgenerator.The
outputofmodulationgeneratorisavailableattheBNC (20) andthishastobe
connectedtoModInBNC (19) dependingontypeofmodulationdesired.
The10MHzgeneratoroftheinstrumentactsascarrierfrequencysource.The
modulatedoutputisavailableatOUTPUT BNC (15).

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Feedsignal(Keepinitially1Vpp)attheModInterminal.Supposeyouhavepressed
AMStandardthenyou will getAmplitudeModulatedoutputvaryinglinearlyfrom
0%depthofmodulationto100%depthofmodulationasmodulatingsignalis
increased.WhenAMbalancedisselectedthenoutputisamplitudemodulatedbut
withsuppressedcarrier.Heretheoutputwill bedirectlyrelatedtothemodulating
signalinput.Sincepoweramplifierhasagainof10,theoutputwillbe10Vpp (1V
beingthemodulating signal).
Toachieveanoutputof20Vincreasethemodulating signalto2Vpp andyouwillget
thesamelevelof20Vpp.Thusstudentknowsclearlythedifferenceinstandardand
balancedmodulation.
WhenFMisselectedbymenukeyyouwill observefrequencymodulation.Here
againFMmodulationincreasesastheinputlevelisincreased.Keepmaximum
Modulationinputto2Vpp.Whensweepisselected,alltheexternalmodulationgets
cutoff andfunctiongeneratoroperatesontheinternalsweepvaryingfrom 20msto
4s.Similarlywhenusing ASK,FSKorPWMfeedthesignalatthemodulationInput
(19).
FrequencyCounter (EXTC):
FrequencyMeasurement:
SelecttheExternalCountermodeonLCD.Theunknownfrequencytobemeasureis
appliedatExternalcounterBNC (14) andreadthefrequencyondisplay.

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Warranty
1. Weguaranteetheproductagainstallmanufacturingdefectsfor36monthsfrom
thedateofsalebyusorthroughourdealers.Consumableslikedrycelletc.are
notcoveredunderwarranty.
2. Theguaranteewillbecomevoid,if
a) Theproductisnotoperatedaspertheinstructiongivenintheoperating
manual.
b) Theagreedpaymenttermsandotherconditionsofsalearenotfollowed.
c) Thecustomerresellstheinstrumenttoanotherparty.
d) Anyattemptismadetoserviceandmodifytheinstrument.
3. Thenon-workingoftheproductistobecommunicatedtousimmediatelygiving
full detailsofthecomplaintsanddefectsnoticedspecificallymentioningthe
type,serialnumberoftheproductanddateofpurchaseetc.
4. Therepairworkwillbecarriedout,providedtheproductisdispatchedsecurely
packedandinsured. Thetransportationchargesshallbebornebythecustomer.
ForanyTechnicalProblemPleaseContactusat [e-mail]
ListofAccessories
1. BNCtoBNCCable....................................................................................1No.
2. MainsCord.................................................................................................1No.
3. PCInterfaceSoftware.................................................................................1No.
4. RSCable....................................................................................................1No.
5. e-Manual..................................................................................................1No.
Updated20-01-2009