[linux-audio-user] cabling question: crosstalk between audio and cat5 ethernet?

[Joern Nettingsmeier]

Anahata wrote:
> On Sat, Feb 07, 2004 at 12:45:03PM +0100, Joern Nettingsmeier wrote:
> 
> 
>>the idea is to run an eight-way symmetric audio multicore (shielded 
>>pairs and an outer foil shield as well) along with 4x cat5 s/stp 
>>cables carrying 10/100/1000baseTX ethernet in the same cable duct 
>>over a length of about 15-20 meters.
>>
>>will this lead to problems in the audio signal?
> 
> 
> Twisted pair ethernet is a balanced signal so should radiate little. If
> your audio system is balanced too that will help.
> 
> With three shields between the audio and the ethernet twisted pair I
> doubt if you'll experience problems. You don't mention whether the audio
> cable will be carrying microphone signals or only line level - that
> makes a big difference!

mostly microphone unfortunately.

> If you're really paranoid you could use star-quad audio cable. That has
> four cores instead of two and much better inference rejection than
> twisted pair.

hmm. i wonder how that works? anyway, four-core cables are probably 
too expensive for me.


-- 
"I never use EQ, never, never, never. I previously used to use mic
positioning but I've even given up on that too."
	- Jezar on http://www.audiomelody.com


Jörn Nettingsmeier
Kurfürstenstr 49, 45138 Essen, Germany
http://spunk.dnsalias.org (my server)
http://www.linuxaudiodev.org (Linux Audio Developers)