Fluke Networks CertiFiber Pro Users Manual - Manual (Page 256)

Versiv Cabling Certification Product Family
Technical Reference Handbook
234
About the Launch Events that the Tester Adds to OTDR
Results
If launch compensation is on, and the tester does not find a
launch event when you do an OTDR test, the tester adds one at
the location specified in the launch compensation settings. This
function lets you use launch cords that have low-reflectance
connectors, such as APC connectors, at the end you connect to the
link. Because these connectors make very small reflections or
show as loss events, the tester possibly will not find the launch
event when you use such cords.
Note
This feature also makes a launch event show in
the OTDR results if you do not use a launch cord.
The launch event shows on the EventMap and in
the event table at 0 m and has 0 dB loss. The
OTDR trace shows the launch event marker (an
orange, dotted line) at the location shown on the
EventMap and event table.
If the tester cannot find the launch and tail event when you set
up the launch compensation function, enter the lengths of the
cords manually.
How to Retract the Launch/Tail Cord
When you do not use the launch/tail cord, retract the cord and
use the strap to hold the connectors against the case. See Figure
101.