Inspection Events; Optic Fiber Link And Event Types; Instruction Of Otdr Modules Of Ad1000; Main Features Of Otdr Module - ADInstruments AD1000 User Manual

4.3.1.3 Inspection Events

OTDR sends off a light pulse into the optic fiber to be inspected, and then receive
returning light signals, and starts calculating the "event" distance. The farther the
distance is, the longer time need for scattered light to be received by AD1000.
Event distance can be calculated according to the time of receiving events signals.
Through inspection of scattered signals, properties of optic fiber, connectors, and
tie-ins can be identified.

4.4 Optic Fiber Link and Event Types

Event Type
event that is greater than end threshold.

5 Instruction of OTDR Modules of AD1000

5.1 Main Features of OTDR Module

Ø High dynamic range and short deadzones
Ø Complete sampling under low noise, realize accurate low loss locating
Ø resolution is accurate to 10cm
Ø multiple test model, convenient to meet the requirement of any test
condition
no laser beam in the fiber before testing via OTDR. Otherwise, it may result in
Non-reflection Event
End of optic fiber can be identified through scanning the first loss
Make sure that the optical fiber or cable is not in use and there is
AD1000 User's Manual
Description
Beginning of optic fiber link
Reflection event
Non-reflection event
End of optic fiber link
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