B-1
Appendix B
Loss Test Methods for Fiber Cabling
Introduction
Note
The following discussion uses TIA/EIA-526
terminology for the names of the three common
test methods. See Appendix A for a cross-reference
of the method names in various standards.
The number of fiber connections represented in loss test
results depends on the method used for making reference
and test connections. This appendix describes the three
common methods, A, B, and C, which are defined in the
ANSI/TIA/EIA-526-14A multimode standard, and their
equivalents, A.2, A.1, and A.3, which are defined in the
ANSI/TIA/EIA-526-7 singlemode standard.
This appendix also describes modified and alternate
connections you can use for all types of connectors, including
installations that have different connector styles at the patch
panels and outlets.
Use the Test Method setting on the tester’s Fiber menu in
SETUP to record the method used. This setting does not
affect loss results. It is only saved with the results to record
which method you used.
Note
ANSI/TIA/EIA-526-14A and 526-7 specify Method B
for measuring loss on multimode premises fiber
and Method A.1 for singlemode premises fiber,
respectively.
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