View source for Measuring single mode fiber links with embedded APC connectors

== Problem ==
APC connections produce non reflective OTDR events and are consequently evaluated as splices, most likely generating false failures.

== Solution ==

=== Initial result ===
During OTDR testing of a single mode link with APC connections, you may need to change the event type.

Following picture shows the EventMap of a link with three connections.  

Note that the embedded connection is interpreted as a splice.  

Depending on the splice loss settings, this may have caused a false failure (in this case it doesn't as the limit was set to 0.30dB).  

In any case, this EventMap and consequently the EventTable are incorrect.

[[File:EmbeddedAPCConnectionSplice.png|center|thumb]]

=== Mitigation ===
Notice the black triangle in the upper right corner of the summary tile on the picture above.

Tap on that icon and you will be able to modify the event type from Loss Event (splice) to APC Connector (connection), as demonstrated by this second picture.

[[File:EmbeddedAPCConnection_ChangeEventType.png|center|thumb]]

=== Result ===
In this third and final picture, the topology of this link is now correct.

[[File:EmbeddedAPCConnectionAPCConnection.png|center|thumb]]