Chapter 5
Cable Test Descriptions
Page 5-31
Pair Reversal Test
The Pair Reversal Test switches the transmit and receive pairs
used for NEXT measurement and verifies that the resulting
measurements are essentially unchanged.
The Pair Reversal Test provides a means to verify the NEXT
measurement consistency of the LANcat as recommended by the
EIA/TIA TSB-67 Link Testing Standard. In the Pair Reversal Test,
the NEXT of a link is first measured when transmitting on one pair
and receiving on another. Then the test is performed again with
the transmit and receive pairs reversed. The results should agree
within the magnitude of the LANcat NEXT measurement accuracy
specification. The test is performed automatically on all pair
combinations.
RUNNING PAIR REVERSAL
1.
Connect one end of the cable under test to the LANcat and the
other end to the remote unit. If you are using a TwoWay
System, set the remote unit’s dial to Remote.
2.
Set dial to EXTENDED FUNCTIONS.
3.
Press the arrow keys to highlight PAIR REVERSAL.
4.
Press ENTER. Press ESC to
abort the test.
(Press the arrow keys to select another cable test standard.)
F1
F2
F3
F4
Selecting
Pair Reversal
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