Com-Power CGO-5100B User manual

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INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B
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19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215
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INSTRUCTIONMANUAL
For
CombGenerators
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ModelsCGO‐5100B
1to18GHz,100MHz
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INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215
TableofContents
1.0Introduction..............................................................................................................3
2.0ProductSpecifications..............................................................................................4
2.1OtherrelatedCom‐PowerEquipmentthatcanbeusedwiththeCombGenerators.....4
3.0ImportantPrecautions..............................................................................................4
4.0Warranty...................................................................................................................5
4.1Maintenance..........................................................................................................................5
5.0Applicationandproductoperation..........................................................................6
5.1Application.............................................................................................................................6
5.1.1OperatingProcedures....................................................................................................................7
5.1.2ProblemsRelatedtoTestEquipment...........................................................................................7
5.1.3ProblemsRelatedtotestsite.......................................................................................................8
5.1.4ProblemsRelatedtoTestPersonnel...........................................................................................8
5.2ItemsincludedwiththeCombGenerator..........................................................................8
5.4BatteryReplacement...........................................................................................................9
5.5TroubleshootingCommonproblems..................................................................................9
6.0TypicalRadiatedOutputoftheCombGenerator...................................................10

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INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215
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1.0Introduction
Thismanualincludesproductspecifications,safetyprecautions,productmaintenanceand
warrantyinformation.

InformationcontainedinthismanualisthepropertyofCom‐PowerCorporation.Itisissued
withtheunderstandingthatnoneofthematerialmaybereproducedorcopiedwithout
permissionfromCom‐Power.

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INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215
2.0ProductSpecifications
Models:CGO‐5100B
Electrical
FrequencyRange:1GHzto18GHz
FrequencyStepSize100MHz
FrequencyStability5ppm
AntennaBuiltin
ExternalIndicatorsPoweronandBatterylow
BatteryType:Rechargeable3.6V,NiMH
Chargingadapteroutput6VDC,500mA(Unregulated)
Chargingadapterinput115/230VAC,60/50Hz
Chargingtime8‐10hours
OperatingtimeApproximately18hours
OperatingTemperature15°Cto40°C/59°Fto104°F
Mechanical 
DimensionsWxH6x1inch/15.24x2.54cm
Weight:1lbs/0.45kg
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Thisequipmentisdesignedforindoorandoutdooruse.
2.1OtherrelatedCom‐PowerEquipmentthatcanbeusedwiththeCombGenerators.
• PassiveHornantennamodelAH‐118,1‐18GHz
• ActiveHornantennamodelAHA‐118,1‐18GHz
• Preamplifiermodel–PAM‐118A,1‐18GHz,40dBGain
3.0 ImportantPrecautions
Batterycareandinstructions:
Toavoidanyriskofexplosion
• Replacebatterieswiththesizeandtypespecifiedinthismanual.
• Donotdisposeofbatteriesinafireortrashincinerator,orleavebatteriesunder
directsunlight.
• Donotimmersebatteriesinwaterorotherwisegetthemwet.
• Donotchargebatteries,thatappeartobeleaking,discolored,rusty,deformed;emit
anodor
• UseonlybatterychargeradaptersuppliedwiththeCombGeneratortochargethe
batteries.
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TheonlyuserreplaceablepartintheCombGeneratoristhebatterypack.Itcanbeaccessed
fromthebottomoftheunit.Therearenootheruserserviceablepartsinsidetheunit.Ifthe
CombGeneratorneedsrepairpleasecontactauthorizedCom‐Powerservicecenter.

Page5of10
INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215

4.0 Warranty
Com‐PowerwarrantstoitsCustomersthattheproductsitmanufactureswillbefreefrom
defectsinmaterialsandworkmanshipforaperiodof3years.Thiswarrantyshallnotapplyto:

• Transportdamagesduringshipmentfromyourplant.
• Damagesduetopoorpackaging.
• Productsoperatedoutsidetheirspecifications.
• ProductsImproperlymaintainedormodified.
• Consumableitemssuchasfuses,powercords,cables,etc.
• Normalwear
• Calibration
• ProductsshippedoutsidetheUnitedStateswithoutthepriorknowlegeofCom‐
Power.

Inaddition,Com‐Powershallnotbeobligedtoprovideserviceunderthiswarrantytorepair
damageresultingfromattemptstoinstall,repair,serviceormodifytheinstrumentby
personnelotherthanCom‐Powerservicerepresentatives.

UndernocircumstancesdoesCom‐Powerrecognizeorassumeliabilityforanyloss,damage
orexpensearising,eitherdirectlyorindirectly,fromtheuseorhandlingofthisproduct,or
anyinabilitytousethisproductseperatelyorincombinationwithanyotherequipment.

Whenrequestingwarranty,calibrationorrepairservices,itisrecommendedthattheoriginal
packagingmaterialbeusedforshipping.Damageduetoimproperpackagingwillvoid
warranty.

Inthecaseofrepairorcomplaint,alabelshouldbeattachedtothehousingofthe
instrumentwhichdescribesbrieflythefaultsobserved.Pleaseincludethename,telephone
numberandemailaddressofthecontactperson.Pleasevisitourwebsitewww.com‐
power.comandobtainanRMAnumberbyselectingserviceandcompletingtheonlineform.

4.1Maintenance

Thisproductcontainsnouserreplaceablepartsotherthanthebattery.Iftheunitdoesnot
operateorneedscalibration,pleasecontactCom‐PowerCorporation.Donotremovethe
instrumentcover.Thebatteriescanbeaccessedfromthethebottomoftheunitifneeds
replacement.Anymodificationsorrepairsperformedontheunitbyanyoneotherthanan
authorizedfactorytrainedtechnicianwillvoidwarranty.

Theexteriorsurfacemaybecleanedwithmilddetergentandthenbewipedwithadry,clean,
lint‐freecloth.Usecaretoavoidanyliquidsorforeignobjectsenteringthechassis.

Page6of10
INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215
5.0 Applicationandproductoperation
5.1Application

Com‐PowerCGO‐5100BCombGeneratorisdesignedspecificallyforEMISiteverificationtesting
upto18GHz.TheCGO‐5100Bhashigherfrequencystabilityof5ppmenhancingtheaccuracyof
frequencyoutput.

ACombGeneratorsprovidethefundamentalandharmonicsofthestepfrequency.TheCGO‐
5100BCombGeneratorgeneratesfrequenciesin100MHzsteps.Thefundamentalfrequencyof
100MHzandallharmonicsupto18GHzarepresentattheoutputassoonasthepowerswitch
isturnedon.Forexample,ifviewedwithaspectrumanalyzerorEMIreceiver,theoutput
harmonics100,200,300MHzetc.canbeseen.Ithasacircularchassisforimprovedomni‐
directionalsignalradiation.

EMCtestlaboratoriesuseOpenAreaTestSitesorAnechoicchambersforEMIradiated
emissionstesting.Thesetestsitesareconstructedwithspecificrequirementsandarecalibrated
inaprecisemannertooptimizethereliabilityofthemeasuredemissions.Thetimeandexpense
incurredisconsideredessentialtoincreasetherepeatabilityofthedatatakenonthesesites.

Thedatatakenonthesecalibratedsitesaregenerallyreliable.However,insomeinstances,
discrepanciesdooccur,andthereliabilityofdataisquestionable.Suchdiscrepanciescouldbe
discoveredwheneither(a)datafromtwotestsitesforthesameequipmentdonotmatch,or(b)
thedatafromtwodifferentoccasionsforthesameequipmentatthesamesitesarenot
consistent.

Itisimportanttofindthecauseforsuchinconsistency.However,thisisgenerallyverytime
consuminganddifficultbecausethereasoncouldbeoneoffourcomplexfactors.Thatincludes
theequipmentundertest(EUT),site,testinstrumentationandtestpersonnel.Eachofthese
factorsmayhavemanypossiblecauses.TheEUT,forexample,mayhavechangeddueto
componentvariation,temperature,operatingmode,wearandtear,designetc.Thetestsite
maybeacauseduetoareflectiveobjectnearthesite,variationofgroundsaturationor
ambientsignalpresence.Italsocouldbeduetomalfunctioningtestinstrumentation.The
burdenoffindingandavoidingsuchasituationalwaysfallsonthetestpersonnel.

Itisessentialtoknowifandwhenaproblemoccurs,aswellastheexactreasoncausingthe
problem.TheCombGeneratorcanhelpintheprocesstodeterminethecausesofthe
problems.

Page7of10
INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215

5.1.1OperatingProcedures
MeasuretheemissionsfromtheCombGeneratoratafewstandardfrequenciesandrecordthe
levelsinadailylogpriortostartingaradiatedemissionstest.

• SetuptheCombGeneratoratthetestsitewiththeappropriateantenna.Theremaybe
somevariationathigherfrequencysoconsistentlyusingthesamedirectionminimizes
thevariationduetodirection.Forconvenience,theCombGeneratorhasanglemarkings
onthetop.

• Takemeasurementatdiscretefrequenciessuchas1GHz,2GHz,5GHz,10GHz,12GHz,
15GHz,18GHz,etc.Recordthisinthedailylog.

• Comparethisdatawiththedailylogofpriorreadingstomakesurethatthepattern
doesnothaveabruptchangesfromtheestablisheddailylogatanyfrequency.

Thisdailylogisusedtodetectanytestequipmentortestsiterelatedproblemasdescribed
below.

5.1.2ProblemsRelatedtoTestEquipment

VariationonthedailylogoftheCombGeneratoroutputdataisdependentonthetest
equipmentaswellastestsite.TheCombGeneratorreplacestheEUT.TheCombGeneratornot
onlygeneratestheoutputsimultaneouslyatalltheharmonics,andhasveryhighoutput
amplitudestability.Thisisachievedbyutilizingastabilizedsignalcircuitaswellasgeometryof
theradiator.

WiththevariationsduetotheEUTpracticallyeliminated,onlyvariationsremainingaredueto
otherfactors,mainlythetestinstrumentationandthetestsite.Thevariationduetotest
instrumentationislimitedtothesumtotalofthetoleranceonalltestequipmentused
(spectrumanalyzer,antenna,CombGenerator,cables).Afewdaysofdatawillestablishthe
rangeofvariationtobeexpectedatasite.Variationoflessthan+3dBisusuallyconsidered
normal.Anyvariationinthereadingsabovenormalindicatesapotentialproblem.

Logestablishedoveraperiodoftimecanbeusedtodetectpotentialproblemswith
measurements,sothatitcanbepromptlyinvestigated.


Page8of10
INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215


5.1.3ProblemsRelatedtotestsite

Theaboveprocedurecannotdistinguishtheproblemsrelatedtoatestsite.TheComb
Generatorcanbeusedintwowaystodetectanyproblemwithatestsite.Onemethodisto
startthedailylogimmediatelyaftertheTESTSITEiscalibrated.Thisway,oneiscertainabout
thevalidityoftheTESTSITE.ThesecondmethodistocalibratetheCombGeneratorradiated
outputasabsoluteemissionlevel.SuchcalibrationisprovidedasanoptionwiththeComb
Generators.

Inaddition,whendifficultyariseswithanyEUTdatatakenattwodifferentsites,theComb
Generatorcanbeusedtodetermineifbothsitesgivereliableresults,justbycomparingthedata
atthetwositeswiththeCombGenerator.Inthiscase,ifthetwositesdonotproduce
comparableresults,thesitewithdatamatchingclosesttotheCombGenerator’sabsolute
emissionlevelcanbeconsideredmorereliable.

5.1.4ProblemsRelatedtoTestPersonnel

TheCombGeneratorcannotdirectlyhelptoeliminatethetestpersonnelrelatedproblems.
However,byincreasingtheconfidencelevelandestablishingdefiniteproceduresforeliminating
testsiteandequipmentrelatedproblemsithelpstremendouslyinreducingtheproblems
relatedtoEMImeasurements.

5.2ItemsincludedwiththeCombGenerator

ThefollowingaccessoriesanddocumentsaresuppliedwiththeModelCGO‐5100BComb
Generator:
 BatteryCharger/PowerAdapter
 InstructionManual
 Radiatedtestdata(Optional)
 Rechargeablebattery(pre‐installed)
Optionalitems
• Sparebatterypack


Page9of10
INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215
5.4BatteryReplacement
ThereplaceablebatterypackcanbeaccessedfromthebottomoftheCombGenerator.Six
screwssecurethecovertothebatterycompartment.Pleasechargethenewbatteriesbefore
firstusetomaximizeoperatingtimeoftheCombGenerator.
5.5TroubleshootingCommonproblems

Problem:NoOutput.

A:MakesurethepowerswitchisonandthegreenLEDislit.

• Makesurethebatterylowindicatorisnoton.Checkalltheinterconnecting
cables,adaptersandconnectorsfromthereceivingantennatothereceiver.
Checktheoperationofthereceiverandpreamplifier.
• Reduceresolutionbandwidthandmeasurementspanofthereceivertoseeif
youcanseethesignalabovethenoisefloorofyourreceiver.

Problem:Batterylowindicatorremainslitevenafterchargingformorethan5/6hours.

A:Thebatterymayneedtobereplaced.However,beforeyoureplacethebatteryperformthe
followingsteps
• Makesurethebatteryterminalsareproperlyconnectedtothebatterysocketin
theCombGenerator.MakesureyouarechargingCombGeneratoronlywith
suppliedadapter.
• Checkthechargingadaptertomakesureitissupplyingthepropervoltage.The
unloaded(withoutconnectingittotheCombGenerator)voltagemeasuredat
thechargeroutputjackshouldbeatleast7.5VdctoproperlychargetheComb
Generatorbatteries.Ifthechargingadapterisnotproducingthepropervoltage
replacetheadapter,otherwisereplacebatteryandtrychargingitagain.

Page10of10
INSTRUCTIONMANUAL
CombGeneratorModelsCGO‐5100B

19121ElToroRd●Silverado,California92676●(949)459‐9600●com‐power.com
REV021215

6.0TypicalRadiatedOutputoftheCombGenerator