NFK1-SC FLUKE NETWORKS, NFK1-SC Datasheet - Page 86

• 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
3-10
* For singlemode modules, the 30 km range and an n value greater than 1.52 cause an error. These settings produce propagation times that
Cable tab
SETUP Tab
are beyond the tester’s range.
MANUAL CABLE
SETTINGS
n
BACKSCATTER
Setting
Table 3-1. Settings for OTDR Tests (cont.)
When MANUAL CABLE SETTINGS is disabled, the n and BACKSCATTER values
depend on the selected fiber type. When the MANUAL CABLE SETTINGS is
enabled, the tester enters default values that you can change manually.
The n value is the index of refraction. Index of refraction is used to calculate
length. The default n values defined in the fiber types are suitable for most
applications. Minor differences between the default n and a fiber's actual n
usually do not make enough difference in length to fail a fiber.
Increasing n decreases measured length.*
BACKSCATTER is the backscatter coefficient, which indicates the amount of
light the fiber reflects back to the OTDR (using a 1 ns pulse). This value is used
to calculate event reflectance for OTDR tests.
Enter the backscatter coefficient of the fiber under test, if known. This value is
specified by many fiber manufacturers.
Description