EXFO FTB-635 Wideband Copper and DSL Test Module - Manual (Page 217)

RFL Test
Copper and xDSL Tests 209
RFL-K-Test
RFL-K-Test
The RFL-K Test (Küpfmüller test) method allows you to locate faults on
both conductors of one pair. In other words, the K-Test is specialized for
detecting double faults. Due to the precision and sensitive nature of RFL
tests, the cable pair under test should be open (disconnected) and battery
removed. The test may be used in live cables with ground/earth as a
reference for the 2-wire method, however ground/earth may also
introduce significant noise affecting the accuracy.
The K-Test is performed in 2 steps:
1. Measurements are made with the far end open.
2. Measurements are made with the far end closed (strap).
To access RFL-K-Test:
1. From the Copper main menu Test Groups, select RFL test
.
2. From the Tests menu, select RFL test to start the test.
Tap RFL-K-Test tab to open the window.