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Event Table Field Description
# Event Number:
Indicatestheeventinsequence,wherethehigherthenumberthefurtherdistancefromtheOTDRtheevent
occurs.“E”(End)whichistheeventdeterminedtobetheendoftheberundertest.Thelastcolumnislabeled
"L"therowincludeddatathatisrelevanttothelink(fullberundertest).
P:
Pass/Fail,ifanyoneofthethresholdsarenotmetforandevent,theP/FcolumnwilldisplayanF.The
parameterthatfailedwillbedisplayedinred.Ifalltheparametersaremet,thiscolumnwilldisplayaP.There
isnoPass/Failthresholdforthelasteventlabeled"E"(End)andthePass/Failforthe"L"(Link)rowincludes
the2POINTcolumn,whichforthelinkisthetotallinklossandtheTYPEcolumnwhichforthelinkrowisthe
systemORL.
Km or KF or MI:
EventLocation(DistancefromOTDR),labeledKmforKilometerorKFifunitofmeasureisKilo-feetMIformile.
Thisisthedistance/locationthattheeventoccursalongtheberlink.ThisdatashouldbethesamefortheEnd
ofFiberandLink.
Splice:
SPLICEisthedBlossattheeventatthislocationontheber.Lossisrepresentedasapositivenumber.(A
positive number is the amount of loss and a negative number indicates a gain normally due to mismatched
indexofrefraction.)ThisisasettablethresholdforthePass/Failpurposes.The"E"eventwilldisplayLINKas
this is not an event that would have meaning. The event that is deemed the EOF will normally display a large
lossasthislosswillbegreaterthanthethresholdsettodeterminetheendoftheber.
2POINT:
2PointLossisthelossmeasuredfromtheendofthedeadzoneofthepreviouseventtothebeginningof
currentevent.Thevalueinthe"L"lineofthetableforthiscolumnisthelinkloss.Thelossfromthebeginning
ofthetracetotheeventdeterminedtobetheEOF.Thisisthevalueusedtodetermineiftheberlinkpasses
or fails it's loss threshold.
dB/Km:
dBperKilometerifinKMandDB/KFifinKilo-FeetandDB/MIifinmileunitofmeasure.Thisisthe
calculatedlossperKm,KforMifromtheendofthedeadzoneofthepreviouseventtothebeginningofthe
currentevent.Thevalueinthe"L"lineofthetableforthiscolumnisthedBPer/KM,KforMiforthetotallink.
TYPE:
EventTypeisthetypeofeventorthereturnlossofandevent.Iftheeventhasnoreection,“splc”willbe
displayedandiftheeventisreective,thereectancevaluewillbedisplayed.Forthelasteventwhichis
labeled"E",thereisnotvaluedisplayed,itsimplyshows"End"andinthe"L"row,theOpticalReturnLossfor
thelinkisdisplayed(SystemORL)..
Chapter 7 Fault Locate Operation
7.3 Exit Fault Locator
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