Fluke DTX-1800, Technical Reference Handbook

Page: 175 / 398

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:
W
Caution
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 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 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.