Sea Tel 3011 User manual

Field Service Procedure – Replacement Pol Motor Kit, 3011
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Document No
136825 Rev A
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Tel, Inc. This document may not be reproduced or distributed in any form without prior written
consent of Sea Tel, Inc. 

1. BriefSummary:
Troubleshootingdocumentfordiagnosingafaultwithandreplacingthepolmotoronthe3011antenna.
2. Checklist:

VerifyRangeofMotion
VerifyPotRange
MeasureMotorVoltage
VerifyHarness
3. TheoryofOperation:
Toensurethereceiveandtransmitpathsofthesystemarecorrectlyalignedtothelinearsatellitesignaltheantennas
feedassemblycanbedriventhrougha180degreerangeofmotionbythe24VDCpolmotor.BasedonthevesselsGPS
positionandthelookangletothedesiredsatellitetheDACwillcalculatethenumericalvalueforthepositionofthepol
assembly.ThePCUwillthenissuevoltagetodrivethepolmotoruntilthepolpotoutputsthecorrectvalue,atwhich
pointthefeedwillbealignedtotheincomingsatellitesignal(providedithasbeencalibratedandisfunctioning
correctly).ThenasthevesselsailsandtheGPSpositionchangesthelookangletothesatellitewillalsochangeand
adjustmentswillbemadetomaintaingoodcrosspolisolation(alignmenttothesatelliteslinearsignal).
Oneindicationthatthereisafaultwiththefeedalignmentofthesystemisthatthetargetlightwillbepermanently
illuminatedontheDACandtheantennawon’ttargetcorrectly.Ifthisisthecaseitwillsit8degreesaboveor8degrees
belowoftheelevationlookangleofthesatellite.Thisisbecausepartoftheantennastargetingprocedureistotargetthe
systemaboveorbelowthesatellite,tocalculatetheautothresholdsettingbasedonthenoisefloorlevel,thenitwill
alignthefeedforthecorrectreceptionpositionbasedonthevesselsGPSlocationandthelookuptableintheDAC,
beforetargetingthesatellite.
Ifthesystemisunabletodrivethepolmotororthepolpothasfailedandthecorrectfeedbackfromthepotisnot
obtained,thesystemcan’tcompletethetargetingprocessandtheantennawillstayinthisposition.Settingthepoltype
to“0009”willputthesystemintomanualpolmodewillallowtheantennatotargetthesatellite,howevermisalignment
ofthefeedwillcausebadcrosspolisolation.
4. VerifyRangeofMotion:
FirstverifythesettingsintheDACarecorrect,thepolscaleshouldbesetto“0090”togivethefeed180degreesof
motion.Thedefaultpoloffsetsettingfora3011antennais“0040”.Youmayfindthesehavebeenmodifiedslightlyto
“trim”thepolangle.
InthesetupmenuoftheDACsetthepoltypeto“0009”.Thischangestheoperationmodeofthepolassemblyfrom
automatic(poltype“0072”)tomanualtherebyremovingtheautomaticcalculationbasedonthevesselsGPSposition
andallowsthefeedassemblytobemanuallydrivenfordiagnosticpurposes.Nowenterthepolwindowanddrivethepol
assemblydownintoitslowerendstop,observethepositionofthefeed.Nowdrivethepolassemblyup,thefeedshould
move180degreesundernormaloperation.
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Field Service Procedure – Replacement Pol Motor Kit, 3011
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consent of Sea Tel, Inc. 
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5. VerifyPotRange:
IfnofeeddriveispresentverifythepolreadingontheDACisn’toutofrange(i.e.displayingavalueofeither0or255).If
oneofthesevaluesaredisplayedit’spossiblethepotisn’talignedcorrectlyandthatadjustingitmaybringitbackwithin
thescaletheDACrecognizes.Disengagethepotfromthemaingearsprocketandrotateitspulleytoverifythefeedback
changesontheDAC.Iffeedbackchangesproceedwithcalibratingthepolpotandverifyingitsoperationasdescribedin
section8ofthisdocument.IfthepolcountontheDACdoesn’tchangewhenthepotisadjustedthepothasfailedandis
outputtingadefaultvalue,nodrivewillbeissuedtothepolmotorasthevalueisoutoftherangewhichthesystem
operatesin.Thenthepolpotisdefectiveandmustbereplaced.
6. MeasureMotorVoltage:
Leavingthepoltypeinmanualmode(poltype“0009”),applydrivetothefeedassemblyandmeasurethevoltagetothe
motorontheIDCconnector,24VDCshouldbepresent.Ifvoltageispresentbutthemotorisn’tdrivingthemotoris
defectiveandneedstobereplaced.
Ifnovoltageispresentverifytheconnectionsofthereflectorharnessbymeasuringcontinuityfrompins1to1and2to2
asperthebelowdiagram.



IftheharnessconnectionsaregoodthenthePCUmotherboardisn’toutputtingthevoltagetodrivethemotorandneeds
replacing.
AslongasthepolrangeiswithinthepotlimitstheDACwillissuethepoldrivecommandtothePCUmotherboard,based
ontheantennatargeting,achangeinthevesselsGPSpositionoroperatorinputs.ThePCUmotherboardwillissuethe
voltagetothemotordirectly.Themotorwillthendrivethefeeduntilthecorrectoutputfromthepothasbeenreceived,
atwhichpointthefeedwillbeinthecorrectreceptionposition(providingthesystemisfunctioningandcalibrated
correctly).ThereforethereisalsothepossibilityforapoldrivefaulttobecausedbythePCUmotherboard.
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Field Service Procedure – Replacement Pol Motor Kit, 3011
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consent of Sea Tel, Inc. 
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7. ReplacingthePolMotor:
7.1. Tools.

Snips/Cutters
3mmAllenWrench/Key
3/32”AllenWrench/Key
CableTies/TieWraps
Loctite222,242and638

7.2. Procedure.
Procedureforreplacingthepolmotor,SeaTelkitpartnumber:136815(polmotorassemblypartnumber:132981‐1).

*Caution:Powerdownthepedestalbeforefollowingthis
procedure.

1.Snipthecabletiessecuringthepolmotorharnessusinga
pairofcutters.



2.DisconnectthepolmotorsIDCconnectorfromthe
terminationblockonthefeedassembly.


3.Usinga3mmAllenwrenchremovethe2screwssecuring
thepolmotorassemblytothefeedandremovethe
defectivemotorassembly.Savethehardwareforfuture
use.
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Field Service Procedure – Replacement Pol Motor Kit, 3011
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
4.Installthepulleytothereplacementmotorassemblyin
thesameorientationasonthedefectivemotor.Apply
Loctite638totheshaftandLoctite222tothesetscrew.
Tightenthesetscrewusinga3/32”Allenwrenchensuring,
it’sinstalledagainsttheflatedgeofthemotorshaft.

*Note:ForfurtherinformationrefertotheLoctite
Procedure121730providedwiththiskit.


5.Usingthehardwareremovedinstep3installthe
replacementmotorassemblytothefeed,applyingLoctite
242tothethreads.Looselyinstallthetwoscrewsusinga
3mmAllenwrenchthentensionthemotortoengagethe
pulleytothemainsprocketandtightenbothscrewsto
secureitinplace.


6.ConnectthepolmotorIDCconnectortothetermination
block.


7.Securethepolmotorharnesstothebodyofthemotor
usingacabletie,securetheexcessharnessusingcableties.

*Note:Nocalibrationofthepotisrequiredasithas
remainedengagedwiththemaindrivesprocket.

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Field Service Procedure – Replacement Pol Motor Kit, 3011
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8. PolPotAlignmentandVerification:

1. Drivethereflectorto00.0degreesofelevationtoviewtheorientationoftheLNB:
Pressthebuttontoturnthetrackingfunctionoff(ifapplicable)topreventtheantennafromgoingintoa
search.Pushthebuttonuntilthe“Antenna”windowisdisplayed(thescreenwillshowtheAZ,ELandREL
values).Pressthebuttontwicetoisolatethe“EL”windowandthenpressthearrowtoactivateit(a
cursorwillbedisplayed).Nowusetheandarrowkeystoscrollthecursoralongandusetheandarrow
keystochangetheelevationvalueto“00.0”andpressthebutton.

2. SetthePolTypetomanualmode:
Enterthe“SetupMenu”modebypressingandholdingthearrowkeystogetheruntilthe“ELTrim”or
“AutoTrim”windowisdisplayed.Pushthearrowkeyuntilthe“PolangType”windowisdisplayed.Pressthe
arrowkeytoactivatethewindow.Nowusethelandlarrowkeystoscrollthecursoralongandusethe
andarrowkeystochangethecharacters.Setthe“PolangType”to“0009”(whichismanualmode)andpress
thebutton.

3. Pressthebuttontogotothe“PolOffset”windowandverifythedefaultsettingof“0040”(ifnecessaryuse
thearrowkeystoselecttheappropriatedigitsandchangeaccordingly).
4. Nowpressthebuttonagaintodisplaythe“PolScale”window.Verifythepolscaleissetto“0090”,ifnot
pressthearrowkeytoactivatethewindow.Nowusetheandarrowkeystoscrollthecursoralongand
usetheandarrowkeystochangethecharactersto“0090”andpressthebutton.

*Note:Ifthepolscalewassettoanothervalueotherthan“0090”thefeedwon’thavethefull180degreesof
rotationwhichwouldhavecausedalignmentissues.Ifthiswasthecasesetthepolscaleto‘0090’andrepeatthe
“verifytherangeofmotion”testatthebeginningofthisprocedure.

5. Pressthebuttonuntilthe“Antenna”windowisdisplayed(thescreenwillshowtheAZ,ELandRELvalues).
6. Pressthebutton4timesuntil“Polxxx”isdisplayedandthenpressthearrowkeytoactivatethewindow.

7. Nowholdeithertheorarrowkeytodrivethepoluntilacountof“130”isdisplayed.
*Note:It’sadvisabletohavesomeonewatchingthefeedwhileit’sbeingdrivenasifthepotisn’tcorrectly
calibratedthereisthepossibilitytodamagethereflectorharnessifitiscoiledaroundthefeedassembly.
8. ObservethephysicalalignmentoftheLNB:
TheLNBshouldbehorizontalunderneaththefeedassemblywiththecoaxpointingtowardstheleft(asshown
below).Ifnotcontinueontostep9,otherwiseskipaheadtostep13.

Field Service Procedure – Replacement Pol Motor Kit, 3011
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consent of Sea Tel, Inc. 
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(Steps9‐12requireassistancetoobserveandoperateantennasimultaneously)

9. UsingtheDAC‐2202drivethefeedassemblytohorizontal:
Pressthearrowkeytoactivatethecursoronthepolwindow.Nowholdeithertheorarrowkeytodrive
thepolmotoruntiltheLNBisalignedhorizontally(asshownabove).Nowpressthebuttontode‐activate
thewindow.

10. Locatethepolangpotentiometer(polpot)onthefeedandloosenthescrewthatsecurestheslottedmountingplate
(fig.1.1)witha3/32”Allenwrenchandthencarefullymovethepolpotgearoutofalignmentwiththemainsprocket
(Fig.1.2).

(Fig.1.1)(Fig.1.2)
11. Alignthepotentiometer:
OntheDACverifythecursorisnotdisplayedonthepolwindow,ifitispressthebutton(Fig1.3)(failureto
dothiswillresultindisplaynotchanging).Nowrotatethepotmanuallyuntilacountof“130”isachieved.Now
reinstallthepotonthemaindrivesprocket.
*Note:Whenre‐installingthepotontothemainsprocketitscommonforthereadingtochangeastheteethofthe
sprocketsareengaged.Becauseofthisthetoleranceis+/‐2degreessofrom“128”‐“132”.Ifthealignmentisoutside
oftherangeadjustandreinstallthepotuntilthereadingiswithintolerance..


(Fig1.3)    (Fig1.4)


Field Service Procedure – Replacement Pol Motor Kit, 3011
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12. Drivethepolmotortoitsupperandlowerelectricallimitsandverifytheassemblydrivesinthecorrectdirectionand
thatthefeedassemblyhasthecomplete180degreesofrotation:
OntheDACpressthe arrowkeytodisplaythecursorunderneaththepolvalueandthenpressandholdthe
arrowkeytodrivethefeedtoitsupperendstop.VerifytheLNBisvertical,totheleftoftheOMTwiththecoax
cablepointingupwards.
NowpressandholdthearrowkeytodrivethefeedtoitslowerendstopandverifytheLNBisvertical,tothe
rightoftheOMTwiththecoaxcablepointingdownwards.

*Note:XX09MK2PCUsoftwareversion2.03jandhighersupporttheoptiontoenablethefeedtorotate270
degrees,ifyourfeedrotatesmorethan180degreesthiscanbeturnedoffbyentering“nC001”intotheremote
commandwindowoftheDACtoverifythe180degreesofrotationandreenabledbyentering“nC000”intothe
remotecommandscreen.

13. SetthePolTypetoautomatic(autopol):
Pressandholdthearrowkeystogetheruntilthe“ELTrim”or“AutoTrim”windowisdisplayed.Pushthe
arrowkeytoscrollthroughthesettingsuntilthe“PolangType”windowisdisplayedandpressthearrowkey
toactivatethewindow.Nowusetheandarrowkeystoscrollthecursoralongandusetheandarrow
keystochangethevaluefrom“0009”to“0072”andthenpressthebuttontoputthesystembackinto
automaticpolang(autopol)mode.
WatchtheLNBandverifyitreturnstothecorrectreceptionposition(whilethepolmotorisdrivingthetargetlight
willbeilluminatedontheDAC).

*Note:IfmakingadjustmentstothepolarizationalignmentofaVSATantennacontactingtheNOCafterwardsto
runthroughacross‐polisolationtestandcalibratingtheantennaspoloffsetsettingwillbenecessary.

14. SavethesettingsintheDAC‐2202:
Pressandholdthearrowkeystogetherbriefly,“SaveNewParameters”willbedisplayed.Pressthe
arrowkeytoactivatethewindowandthenpressthebutton,“ParametersSaved”willbedisplayedandthe
poltypeandpoloffsetwillbestoredintheDAC.
