DTX Series CableAnalyzer
Technical Reference Handbook
B-4
Method B/A.1
Method B/A.1 results account for the loss of two
connections plus the fiber in the link. This method is
suitable for testing premises fiber, where patch cords are
typically used at both ends of the link and connector loss is
a significant portion of the total loss. Method B is defined in
the ANSI/TIA/EIA-526-14A multimode standard. Method A.1
is defined in the ANSI/TIA/EIA-526-7 singlemode standard.
Method B/A.1 reference connections cancel out the effects
of the reference test cords, as shown in Figure B-2.
Loss results for Method B/A.1 therefore represent both
connections plus the fiber in the link. ANSI/TIA/EIA-526-14A
and 526-7 specify Methods B and A.1 for testing multimode
and singlemode premises fiber, where connector loss is a
significant portion of the total loss.
Note
Other methods are available for getting Method B
results on links that have different connector styles
at each end or for when you do not have the
correct connector adapters for the tester. See
"Modified Method B" on page B-8 and "The
Alternate Method" on page B-11.
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