Re: STP vs. UTP
Dear Dan and Antoon,
it is important not to mix up ESD and RFI artifacts. Your assumptions may make sense from an RFI perspective (where problems can be confined to specific components or parts of a device), but ESD is affecting products in a totally different way. From basic electric laws, you may consider that the impact of any given electric charge will be largely depending on the device's mass and its grounding impedance.
There is an obvious disparity of typical MIDAS mixing environments (XL8 or Pro Series consoles with large and heavy chassis plus I/O racks, solidly grounded) and smaller BEHRINGER (X32 + S16) setups. This is the reason why from a BEHRINGER perspective we recommend using screened and grounded cables, while UTP may confidently be used in the MIDAS world.
Please also consider that the MIDAS PRO Series consoles allow for dual-redundant AES50 connectivity, which in this context may help to further reduce the screen and grounding impedance and distribute the impact of any ESD. Other than that, there is no technical difference between an AES50 port on MIDAS and BEHRINGER products.
The good news for our customers is, that we have just placed a large order for a high quality, ruggedized Neutrik etherFLEX cable that will be provided by KlarkTeknik on a 50 m Schill drum. We will announce this officially at PLS, Frankfurt, in a couple of weeks from now.
Hope that helps.
Best,
Jan
Thanks for the reply, Jan.
While I'm not immediately persuaded that the X32 is smaller and lighter than all Midas products, and that that will make the difference between ESD problems and ESD no problems, I don't know them as well as you do and so will take what you say at face value. I guess the stage boxes are certainly smaller, S16 vs. whatever.
As was pointed out in another forum this morning, given the price point of the X32 family it would be much better if it were able to operate with cable that is cheaper and more importantly, more commonly available rather than a cable that you, Behringer, have to have made yourself to be sure to get the right one.
I'm happy to hear more specifics about the upcoming cable, though. Is it only available in 50 meter lengths, on a drum, and in single runs?
I have no use for drums, as I tape my snake cable together with an analog 4 or more pair, as well as the AC supply to FOH so that one pull gets it all. I also want to run multiple Ethercon runs to FOH, both as a backup and also because there are situations that need more than one Ethercon run.
Thanks again,
Dan
Edit: And if you're saying that mass is the only factor, why did the XL8 initially have problems and then not have problems? Its mass didn't change.
If more mass is better, why can't I just attach a chunk of aluminum to the bottom of an S16 chassis and have an immediate solution? Or enough S16's racked together to create an object the size of the Midas stage box?
The Pro 1 weighs 47.5 pounds, and the X32 is 45.4 pounds. Not much mass difference there, but one is OK with UTP and the other requires STP.
Sorry, need more explanation.