Com-Power ALFM-80120 User manual

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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
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INSTRUCTIONMANUAL
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LogPeriodicAntenna
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ALFM‐80120
88MHzto108MHz
(Extendibleto80to120MHz)
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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
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TableofContents
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1.0Introduction...............................................................................................................3
2.0ProductSpecifications..............................................................................................4
3.0ImportantSafetyPrecautions..................................................................................5
4.0Warranty...................................................................................................................6
5.0Maintenance..............................................................................................................6
6.0AssemblyInstructions...............................................................................................7
7.0TypicalPerformanceData........................................................................................9
Figure1:Assemblydiagramofantenna ............................................................................ 7
Figure2:Elementsinstallationdiagram ........................................................................... 8
Figure3:AntennaFactorandIsotropicGain@1mtrtestdistance. .............................. 9
Figure4VSWRandReturnLoss. ....................................................................................... 9
Figure5:Typicalforwardpowerlevels. .......................................................................... 10
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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
1.0 Introduction
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Thismanualincludesproductspecifications,safetyprecautions,productmaintenanceand
warrantyinformation.
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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
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
2.0 ProductSpecifications
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Model:ALFM‐80120
FrequencyRange: 88MHzto108MHz(extendibleto80MHzto120MHz)
Polarization:Linear
NominalImpedance: 50Ω
PowerHandling: 2500watts(CW)max.
Connector:7–16DINFemale
AntennaFactor:
  6to8[dB(m‐1)]
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(@1mtrdistance)
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IsotropicGain:  1.5to5dBi(@1mtrdistance)
VSWR:<1.3(80to88MHz)
<1.25(88to108MHz)
<1.45(108MHzto120MHz 
Mounting:¼”x20threadedCenterpivotingjointforHorizontaland
Verticalpolarization
Dimensions:
HxWxD(inches/cm):7.5×81.9×82.7/19×208×210(Fullyassembled)
Weight:  13.5lbs/6.1kg
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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
3.0 ImportantSafetyPrecautions
DonotexceedMaxRFinputlevelstatedinthespecifications.ExcessiveRFinput
mightdamagetheRFfeedercableorconnector.Wheninoperation,theRFvoltages
onthecenterpinoftheRFinputconnectoraretransferredtothefeedertubesand
elementsanditcanbehazardous.Donotcomeintocontactwiththefeedertubesor
elementswhentheRFinputconnectorisconnectedtoaliveRFsource.Toavoid
injurytopersonnelandaccidentaldamagetopoweramplifierorantenna,disablethe
RFoutputofpoweramplifierbeforeconnectingordisconnectingtheinput
connectiontotheantenna.
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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
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:
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• 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.
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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.
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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.
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Whenrequestingwarrantyservices,itisrecommendedthattheoriginalpackaging
materialbeusedforshipping.Damageduetoimproperpackagingwillvoid
warranty.
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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contactCom‐
Poweratsales@com‐power.comor949‐459‐9600toobtainanRMAnumberpriorto
shippingtheunitback.
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
5.0 Maintenance
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Thisproductcontainnouserserviceableparts.Iftheunitdoesnotoperateorneeds
calibration,pleasecontactCom‐PowerCorporation.Anymodificationsorrepairs
performedontheunitbysomeoneotherthananauthorizedfactorytrained
technicianwillvoidwarranty.
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Theexteriorsurfacemaybecleanedwithmilddetergentandthenbewipedwitha
dry,clean,lint‐freecloth.

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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
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6.0 AssemblyInstructions
Com‐PowerALFM‐80120Logperiodicantennaisdissassebledforeaseof
shippingandhandling.
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ItemsInlcudedintheshipment:
i) Feedertubes.
ii) Tenpairsoflogelements.
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Caremustbetakeninassemblingtheelementsinthecorrectorderand
directiontomaintaintheperformanceoftheantennaasperspecification.
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Twoimportantaspectsforassemblyare,
a) Thesequenceofelements(basedonlengthofeachelement)
b) Thedirectionofprotrusion/extensionofeachelementoneachfeedertube.
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ThebasicdiagrambelowshowstheRighthandsideviewoftheantenna
lookinginfromtheTip/Noseoftheantenna.
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Theyellowcircleindicatesthedirectioninwhichtheelementshould
protrudeout.Thescrewindicatestheelementisprotrudingintheopposite
direction.
Foreg:Consideryouarestandingfacingthenose/tipoftheantenna.Element
1fromtheupperfeedertubewillbeextendingouttoyourrightandthe
elementfromthebottomfeedertubewillbeextendingtoyourleft.
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Figure
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1:Assemblydiagramofantenna
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1↑2↓3↑
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4↓
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5↑
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6↓
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7↑
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8↓
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9↑
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10↓
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Nose/Tipof
Antenna

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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
Foreaseofidentification,thestoragebagsforeachpairofelementsaremarkedwith
numbersonethroughtencorrespondingtothepositionoftheelementonthefeedertubes.
Thechannelgrooveontheundersideofthebottomfeedertubeismarkedrespectivelyfor
easypairingwithelements.
Thereisanarrowindicatornexttoeachnumberwhichdepictsdirectionoftheprotrusionof
theelementonthebottomfeedertube(asshowninthefigurebelow).
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Figure2:Elementsinstallationdiagram
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Pleasenotethatthedirectiondepictedisfortheelementattachingtotheslotsonthe
bottomfeedertube.Theelementsattachingtheupperfeedertubeelementwillbeofthe
samelengthbutconnectedintheoppositedirection.

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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
7.0 TypicalPerformanceData
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Figure3:AntennaFactorandIsotropicGain@1mtrtestdistance.
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Figure4VSWRandReturnLoss.
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INSTRUCTIONMANUAL
ALFM‐80120LogperiodicAntenna
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19121ElToroRd●Silverado,CALIFORNIA92676●(949)459‐9600●com‐power.com
REV111315
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Figure5:Typicalforwardpowerlevels.
Fieldstrengthshavebeencalculatedforfree‐spaceconditions.Individualshieldedrooms,amplifiers,andtest‐systemconditions
willinfluenceperformance.FieldstrengthalsovarieswithfrequencyandpositionofantennaandEUTinnon‐anechoictesting
environments.