Once the OTDR parameters have been set, an OTDR trace can be run. Press
from the
trace screen until the following menu options appear:
starts an OTDR trace based upon the current OTDR parameters
During the OTDR test (as shown at right):
!
the ABORT soft-key appears (used to abort an OTDR trace)
!
all soft-keys are disabled
!
a bar graph appears at the top of the screen showing the progress of the OTDR test
!
dual-wave test will run a separate trace automatically for each wavelength
starting a new trace will replace the old trace on the display with the new trace after a few seconds (depending upon the
trace length).
TEST
9
STARTING AN OTDR TRACE
Once the OTDR trace is complete, the OTDR trace will appear on the screen, and the OTDR
information – distance and optical power – will be updated.
Trace information is color-coded.
and
refer to the cursors.
text refers to the
difference between the two cursors.
text refers to the perceived end of the fiber link.
sets the active cursor – no cursor,
,
, or both
and
locks the active cursor at its current location; unlocks a locked cursor
When a cursor is locked, a colored padlock symbol will appear next to
the appropriate cursor information
sets the ZOOM mode to Horizontal (H) or Vertical (V)
WHEN ONE OR MORE CURSORS ARE SELECTED:
moves the cursor(s) left or right; holding these buttons
speeds up the cursor movement
WHEN NO CURSOR IS SELECTED:
screen pans left and right
WHEN ONE OR MORE CURSORS ARE SELECTED:
zooms in or out on the active cursor(s)
WHEN NO CURSOR IS SELECTED:
zooms in and out on the center of the screen
two color coded traces will appear on the screen if a dual-wavelength trace was run
Red
red
red
green
green
green
Blue
Orange
LOCK
LOCK
ZOOM
CURSOR NAVIGATION
SECTION 2: OTDR TESTING
1m
1m
1m
RFL dB
-81.00
0
dB
0.00
0.00
L m
TESTING
ABORT
1550nm
6086m
20226m
24718m
RFL dB
-81.00
14140
dB
2.34
3.43
L m
Fiber #
CURSOR
LOCK
ZOOM
TEST
ENTER
AUTO
1550nm
TEST
ZOOM
LOCK
CURSOR
