DTX Series CableAnalyzer
Technical Reference Handbook
B-6
Method C/A.3
Method C/A.3 results account for the loss of only the fiber in
the link. Method C/A.3 is suitable for testing links where the
fiber's loss is the majority of the total loss, such as when the
link is very long or patch cords are not used at either end.
Method C is defined in the ANSI/TIA/EIA-526-14A
multimode standard. Method A.3 is defined in the ANSI/
TIA/EIA-526-7 singlemode standard.
Method C/A.3 reference connections cancel out the effects
of both reference test cords and two connectors in each
fiber path, as shown in Figure B-3.
The test connections add only the fiber in link to each path.
Loss results for Method C/A.3 therefore represent only the
fiber in the link.
Because the results omit both connections in the link, ANSI/
TIA/EIA-526-14A and 526-7 do not recommend Method C/
A.3 for testing premises fiber, where patch cords are
typically used at both ends of the link and connector loss is
a large portion of the total loss.
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