NFK1-SC FLUKE NETWORKS, NFK1-SC Datasheet - Page 260

• Manufacturer Part Number: NFK1-SC
• Description: LAN Tester
• Manufacturer: FLUKE NETWORKS

Specifications of NFK1-SC

• Lead Free Status / RoHS Status: na

OF-500 OptiFiber Certifying OTDR
Technical Reference Handbook
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 A shows the
names of the standards that define the 2 Jumper method.
Reference connections for the 2 Jumper method cancel out
the effects of one connection and two reference test cords
in each fiber path, as shown in Figure B-2.
B-4
The test connections add one connection and 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.