With APC ferrules, we have an angled surface that MUST be oriented in a specific location relative to the connector key (if not, then two angled connectors would never mate together when connected). Any rotational deviation from this angle-to-key orientation is known as Key Error. Causes of Key Error can be difficult to identify.
Key Error is most commonly the result of the polishing fixture key width being significantly larger than the connector key width. It can also be the result of poor-quality connector components (usually plastic housings) which do not hold the ferrule solidly in the proper orientation relative to the connector’s key.
READ THE BLOG: Polished Connector Geometries, APC
Additional resources from the FOC team include:
- Category Resource:
- Glossary, Acronyms, Military Specifications for Connectors: http://bit.ly/2a2EFn8
- Q&A Resource: email technical questions to AskFOC@focenter.com
Have questions about this FOC Tip?
Contact FOC with questions at: (800) 473-4237 / 508-992-6464 or email: FiberOpticCenter@focenter.com and we will respond ASAP.
- Aramid yarns and Good stripping techniques - September 11, 2019
- When the “back-side” connector end-face is contaminated, it is difficult to have access to remove the connector for cleaning - September 8, 2019
- Fiber Optic Cable Splicing Explained - September 7, 2019
- Ways in which the end-face can become contaminated along the way - September 6, 2019
- Removal of coatings from short fiber in certain sections - September 5, 2019
- End-face quality and cleanliness - September 4, 2019
- Re-cleaning a connector after installation - September 4, 2019
- The two wavelengths used for Insertion Loss testing - September 3, 2019
- Ensuring connector end-faces meet industry standards on end-face cleanliness (ex. IEC 61300-3-35) - September 2, 2019
- The “Ideal” Fiber Height for a Fiber Optic Connector – and How to Achieve It - August 31, 2019