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 one connection and two reference patch cords
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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