User Manual

Fault Locating: Full Auto

Set Mode to Full Auto

Clean and Connect launch cable

Select Test Port: MM or SM

Select Fiber Type

Measuring Loss on an OTDR Trace

Select Launch Cable: Noyes (150m), None, User

In General Tab Set Distance Units: m, ft, kft, km, mi

Press Test key

• Position the left cursor [A] at the start of the

event

• Position the right cursor [B] beyond the event

where the trace returns to a constant slope

• Read the inser tion loss ( Loss : in dB)

measurement

An OTDR trace shows relative power vs. distance.

The insertion loss (IL) between any two points (A

to B) on the optical ber link under test equals the

trace level at A minus the trace level at B.

To measure the end-to-end loss of a link, use a

launch and receive cable and put the [A] cursor

before the rst event in the link and the [B] cursor

just after the tail of the last event.

A B

Launch Cable

Break

Trace displaying Fault

Expected trace

Two Point A/B Measurement