Fluke SimpliFiber Pro User Manual page 68

SimpliFiber Pro Meter and Test Kits
Users Manual
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.
2 jumper reference connections cancel out the effects of one
connection and two test reference cords, as shown in Figure
D-2.
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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, ANSI/TIA/EIA-526-
14A and 526-7 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.