Alien Crosstalk
When cables are adjacent to each other, emissions
from one cable can affect pairs in the other cables. This effect
is called Alien Crosstalk. For UTP cables that are closely bundled
together for a distance of more than 15 meters,Alien Crosstalk
can be a concern. Alien Crosstalk, unlike NEXT, is an unpredictable
noise source. Measurement of alien crosstalk is difficult because
it requires synchronizing two sets of test instruments, and
it is a lab measurement only. There are no pass/fail limits
proposed or set.
The animation below helps illustrate this potential problem.
|
