NFK1-SC FLUKE NETWORKS, NFK1-SC Datasheet - Page 109

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

Specifications of NFK1-SC

• Lead Free Status / RoHS Status: na

GAINER
An apparent gain in the
strength of the returned
signal.
OUT OF RANGE
The tester did not find an
end event.
Event
Tips: If you test the fiber from the other end, the gainer event will show a loss. Adding this loss to
Caused by a splice between two fibers with different backscatter coefficients, numerical
apertures, core diameters, or mode field diameters.
Check the fiber type on either side of the splice. Replace fiber if necessary. Matching fibers
may have different tolerances, which can cause gainers at a splice. In these cases, the splice
is good and does not require rework.
This can occur in Manual mode when the selected range is too short.
In Auto mode, OUT OF RANGE can occur when the cabling is much longer than the module's
range. Rarely, very bad connections along the cabling can cause the OTDR to select a range
that is too short.
For Manual mode, select a higher range on the OTDR tab in Setup.
For Auto mode, compare the expected cabling length to the module's test range. If the
length is within range, try testing in Manual mode with the maximum range setting.
the event’s gain gives the true loss of the event. If you do a bi-directional test, then upload
the results to LinkWare software, you can use the bi-directional averaging utility in LinkWare
to calculate the true loss of gainers.
Gainers at launch events can occur when the launch fiber does not have the same properties
as the fiber you are testing. In this situation, you can get more reliable results if you do a bi-
directional test and calculate the true loss as described above. Use a receive fiber that has the
same properties as the launch fiber and use Launch + Receive compensation.
Table 3-4. Event Types (cont.)
Possible Causes and Solutions
Looking at OTDR Test Results
Using the OTDR
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