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<blockquote data-quote="Per SÃ¸vik" data-source="post: 116543" data-attributes="member: 1285">Re: STP vs. UTPI&#039;ve finally come up with a theory why my setup works flawlessly even when I use cheap cable. Since I run both stage and FOH off the same UPS, my equipment is connected with good grounding apart from the AES50 cabling. What I realized the other day was that it is connected through a shorter path by this power cable ground, so a discharge pulse will arrive roughly 20nS (5 meter difference) earlier through the power cable than through the AES50, thus essentially blocking a lot of the pulse that goes through the AES50 cable. One would normally expect that the current distribution would be according to the impedance ratio between the two, but the current through the AES50 cable will also be defined from a lower potential. Actually, since the distance is shorter, it makes less sense to have continuity in the shield because the risk of building up enough potential to have a &quot;spark&quot; anywhere on the AES50 line will be much reduced.</blockquote>

[QUOTE="Per SÃ¸vik, post: 116543, member: 1285"] Re: STP vs. UTP I've finally come up with a theory why my setup works flawlessly even when I use cheap cable. Since I run both stage and FOH off the same UPS, my equipment is connected with good grounding apart from the AES50 cabling. What I realized the other day was that it is connected through a [U]shorter[/U] path by this power cable ground, so a discharge pulse will arrive roughly 20nS (5 meter difference) earlier through the power cable than through the AES50, thus essentially blocking a lot of the pulse that goes through the AES50 cable. One would normally expect that the current distribution would be according to the impedance ratio between the two, but the current through the AES50 cable will also be defined from a lower potential. Actually, since the distance is shorter, it makes less sense to have continuity in the shield because the risk of building up enough potential to have a "spark" anywhere on the AES50 line will be much reduced. [/QUOTE]

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