Knowledge Base - FAQ

Why do the Encircled Flux testers use an FC connector?

Tuesday, December 31, 2019
Submitted by ryan.grace on October 23, 2021 - 5:33pm
Question: 
Why do the Viavi Encircled Flux modules for the Viavi Certifier 40G use an FC connector?
Answer: 
We achieve EF (Encircled Flux) by having EF at the connector then using a "modally transparent" launch cord. This requires a very tight core alignment at the output port of the tester. The FC connector type provides the best core alignment.

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