Users Manual Owner manual

Versiv Cabling Certification Product Family
Technical Reference Handbook
250
Table 11. Event Types
Event Description
Reflection
A pulse of light
reflected back to the
OTDR.
Reflections are caused by a connector, a tight
bend, a mechanical splice, or a crack in the fiber.
Reflective events can possibly be ghost events.
These are frequently smaller than reflective
events that are connectors.
If the reflection is not caused by a connector,
inspect the cable for tight bends or damage. Use
a visual fault locator to verify the fault.
OTDR Port
The connector on the
OTDR.
This event is the OTDR port on the tester. The
OTDR Port
event always shows N/A for loss
because backscatter measurements are not
available on both sides of the event.
The tester does not give a PASS/FAIL status to
this event.
Launch
The end of the launch
cord.
Tail
The start of the tail
cord.
The tester identifies these events if you
connected launch and tail cords and turned on
LAUNCH COMPENSATION on the TEST SETUP
screen. See “About Launch and Tail Cords” on
page 226.
Loss
An event where the
level of reflected light
suddenly decreases, and
the reflection from the
event is too small to
measure.
Caused by a splice, bend, or a low-reflectance
connection, such as an angled physical contact
(APC) connection.
If the loss event is not caused by a splice or APC
connection, inspect the cable for tight bends,
especially if the loss is more at a higher
wavelength.
When the tester uses a narrower pulse width,
some loss events can show as reflective events.