
OTR 700 User's Guide Rev02 11/2016
14
Event Table Field Description
# Event Number:
Indicates the event in sequence, where the higher the number the further distance from the OTDR the event
occurs.“E”(End)whichistheeventdeterminedtobetheendoftheberundertest.Thelastcolumnis
labeled"L"therowincludeddatathatisrelevanttothelink(fullberundertest).
P:
Pass/Fail, if any one of the thresholds are not met for and event, the P/F column will display an F. The
parameter that failed will be displayed in red. If all the parameters are met, this column will display a P. There
is no Pass/Fail threshold for the last event labeled "E" (End) and the Pass/Fail for the "L" (Link) row includes
the 2POINT column, which for the link is the total link loss and the TYPE column which for the link row is the
system ORL.
Km or KF or MI:
Event Location (Distance from OTDR), Labeled Km for Kilometer or KF if unit of measure is Kilo-feet MI for
mile.Thisisthedistance/locationthattheeventoccursalongtheberlink.Thisdatashouldbethesamefor
the End of Fiber and Link.
Splice:
SPLICEisthedBlossattheeventatthislocationontheber.Lossisrepresentedasapositivenumber.(A
positive number is the amount of loss and a negative number indicates a gain normally due to mismatched
index of refraction.) This is a settable threshold for the Pass/Fail purposes. The "E" event will display LINK as
this is not an event that would have meaning. The event that is deemed the EOF will normally display a large
lossasthislosswillbegreaterthanthethresholdsettodeterminetheendoftheber.
2PO I NT:
2 Point Loss is the loss measured from the end of the dead zone of the previous event to the beginning of
current event. The value in the "L" line of the table for this column is the link loss. The loss from the beginning
ofthetracetotheeventdeterminedtobetheEOF.Thisisthevalueusedtodetermineiftheberlinkpasses
or fails it's loss threshold.
dB/Km:
dB per Kilometer if in KM and DB/KF if in Kilo-Feet and DB/MI if in mile unit of measure. This is the
calculated loss per Km, Kf or Mi from the end of the dead zone of the previous event to the beginning of the
current event. The value in the "L" line of the table for this column is the dB Per/KM, Kf or Mi for the total link.
TYPE:
EventTypeisthetypeofeventorthereturnlossofandevent.Iftheeventhasnoreection,“splc”willbe
displayedandiftheeventisreective,thereectancevaluewillbedisplayed.Forthelasteventwhichis
labeled "E", there is not value displayed, it simply shows "End" and in the "L" row, the Optical Return Loss for
the link is displayed (System ORL).
Chapter 7 Fault Locate Operation