DTX Series CableAnalyzer
Technical Reference Handbook
C-4
2 Jumper Method
Results from the 2 Jumper method 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. Appendix B shows the
names of the standards that define the 2 Jumper method.
Reference connections for the 2 Jumper method cancel out
the effects of the test reference cords and one connection
in each fiber path, as shown in Figure C-2.
The test connections add one connection, plus the fiber in
the link, to each path. Loss results for the 2 Jumper method
therefore represent only one connection plus the fiber in
the link. Because the results omit one connection, industry
standards do not recommend the 2 Jumper method 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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