DTX Series CableAnalyzer
Technical Reference Handbook
B-2
Method A/A.2
Method A/A.2 results account for the loss of one connection
plus the fiber in the link. This method is suitable for links
where the fiber's loss is a significant portion of the total
loss, such as when the link is long or a patch cord is used at
only one end. Method A is defined in the ANSI/TIA/EIA-526-
14A multimode standard. Method A.2 is defined in the
ANSI/TIA/EIA-526-7 singlemode standard.
Method A/A.2 reference connections cancel out the effects
of the reference test cords and one connection in each fiber
path, as shown in Figure B-1.
The test connections add one connection, plus the fiber in
the link, to each path. Loss results for Method A/A.2
therefore represent only one connection plus the fiber in
the link. Because the results omit one connection, ANSI/TIA/
EIA-526-14A and 526-7 do not recommend Method A/A.2
for testing premises fiber, where patch cords are typically
used at both ends of a link and connector loss is a
significant portion of total loss.
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