Using the OTDR Module
Setting Up for OTDR Testing
7-17
7
Manually Selecting the Launch and Receive Events
If necessary, you can manually select the launch and receive
events on the Event Table screen, as follows:
1
Run the Launch Compensation function.
2
Set the launch/receive events:
WCaution
Do not set the launch or receive event to a hidden
event. Do not set the receive event to an event
followed by a hidden event. Doing so may make
length and loss results unreliable.
Note
The tester might not identify a low-reflectance
connection, such as an angled physical contact
(APC) connection, as a launch/receive event. These
connections may show as loss events, which you
can manually select to be the launch/receive event.
•
For Launch Only compensation, highlight the event
that is the end of the launch fiber, press
K Move
Launch; then press
N.
•
For Launch + Receive compensation, highlight the
event that is the end of the launch fiber and the
beginning of the receive fiber; then press
K and
L as necessary to move or set the launch and
receive fibers.
•
For Launch + Fiber + Receive compensation,
highlight the event that is the end of the launch
fiber; then press
K Set Launch or K Move
Launch.
Next, highlight the event that is the beginning of
the receive fiber; then press
L Set Receive or
L Move Receive.
3
To see where the markers are set on the trace, press
J View Trace.
4
Press N; then press K OK. Launch Compensation is
automatically enabled in Setup.
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