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The Unger Model is an empirical standard model for near-end crosstalk power spectra as experienced by communication systems over unshielded twisted pair.
Twisted pair cables are usually grouped together in a binder where they experience crosstalk. Based on empirical observations, Unger proposed that, at the 1% worst case, the NEXT power spectra | H N E X T | 2 {\displaystyle |H_{NEXT}|^{2}} , due to a single disturber, can be bounded by
while the NEXT power spectra due to 49 disturbers can be bounded by
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