Microtest OMNIScanner2 Guide de l'utilisateur télécharger pdf (Page 123)

C - 1

OmniScanner User Guide

Appendix C - OMNIFiber PASS/FAIL

Criteria

For the latest cable installation, international standards, and conformance

techniques:

http://cabletesting.com/Fiber_Standards.html

Formula 1: 568A Equation for 850nm fiber:

(# of mated connections x 0.75) + (# of splices x 0.3) + (length x 3.75dB/1000m) = OLB*

Formula 2: 568A Equation for 1300nm fiber:

(# of mated connections x 0.75) + (# of splices x 0.3) + (length x 1.5dB/1000m) = OLB*

Formula 3: 11801 Equation for 850nm fiber:

(# of mated connections x 0.75) + (# of splices x 0.3) + (length x 3.5dB/1000m) = OLB*

Formula 4: 11801 Equation for 1300nm fiber:

(# of mated connections x 0.75) + (# of splices x 0.3) + (length x 1dB/1000m) = OLB*

*Optical Link Budget (OLB) is the loss measured in a fiber link. Loss in the

connectors, the splices, and the cable are added up to the total link loss or

OLB.

The TIA 568A Equation and the ISO 11801 Equation specify the OLB. Each

has certain PASS/FAIL criteria based on the number of connectors and

splices located along the cable to be tested. These amounts can be entered

as test limits. OMNI

Scanner

then calculates optical power loss as follows:

Max. Loss (dB) = Cable Loss + Connector Loss + Splice Loss.

The Optical Link Budget (OLB) is the PASS/FAIL point in dB. The number of

connections and splices is entered in the first Autotest screen.

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Microtest OMNIScanner2 Guide de l'utilisateur Page 123