Lightning protection guide by OBO

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Last revision 2020

Vydal: OBO BETTERMANN s. r. o. Autor: OBO BETTERMANN

Strana 232 z 288

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The curves be- low show the transmission characteristics high-qual- ity and inferior cables. This effect is known Near End Cross Talk (NEXT).NEXT Due capacitive inductive coupling, signal com- ponents from pair wires can coupled onto an- other pair and cause interference there. Crosstalk pairs wires Good NEXT values Limit values Relevant frequency range Poor NEXT values Schematic diagram NEXT measurement: comparison good and poor NEXT values TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 232 Chapter The internal lightning protection system . Transmission standards, such the network classes according to EIA/TIA 568A/B 50173-1, specify the maximum NEXT values for transmission path