OTDR MODE
TEST PROCEDURES
OTDR MODE
MANUALLY SETTING END OF FIBER (EOF) MARKER
The OTDR marks the perceived end-of-fiber event with an
dotted line.
However, in certain cases, the “end-of-fiber” event may be mis-marked due to factors such
as echoes that occur in the noise area of the trace.
The EOF function gives technicians a way to manually set the EOF marker to the correct
position.
SETTING EOF MARKER
Select either one (and only one) of the cursors to be the active cursor (in this example, the
cursor is the only active cursor).
Move this active cursor to the actual EOF position. This cursor should be positioned on the
backscatter immediately where the actual EOF event occurs.
Press the Enter key until the following menu appears at the bottom of the OTDR display:
Press
key once. A “SET END OF FIBER” message will indicate that the
OTDR is ready to re-position the EOF cursor.
(If the active cursor is not yet set in the correct EOF position, the technician can move the
active cursor at this time.)
Once the active cursor is in the correct EOF position, press
key again to
re-position the EOF cursor.
orange
green
EOF
EOF
MENU
VFL
EOF
EVENTS
6086m
20226m
24718m
RFL dB
-81.00
14140
dB
2.43
3.34
L m
Fiber #
VFL
MENU
EOF
EVENTS
ENTER
1550nm
AUTO
H
incorrect end of
fiber position
6086m
20226m
24718m
RFL dB
-81.00
14140
dB
2.43
3.34
L m
VFL
MENU
EOF
EVENTS
ENTER
1550nm
AUTO
H
EOF cursor now
in correct position
Fiber #
6086m
20226m
24718m
RFL dB
-81.00
14140
dB
2.43
3.34
L m
VFL
MENU
EOF
ENTER
1550nm
AUTO
SET END OF FIBER
H
active cursor set
to correct EOF
EVENTS
