Knowledge Base - Solution

OTDR Sections with no slope measurement

Monday, July 10, 2023
Submitted by ryan.grace on August 11, 2023 - 10:38pm
Problem: 
Why do some of the OTDR section results have no slope values and others do on my Viavi OTDR?
Solution: 
When the section is very short (2Kms or less typically) and very linear then the intrinsic error starts to be come high when compared to the very small db/km loss result making it difficult to ensure an accurate result. Is this scenario the test will not report a db/km value. Other factors can also contribute such as insufficient data points for that section. In these cases, the customer can perform a manual slope measurement for that section.

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