AES over Cat5e? - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 9th March 2009, 02:19 PM   #1
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Default AES over Cat5e?

Hi,

I'm working on a new project that involves sending power, control and AES audio over cabling.
I was wondering if I could use Cat5e cable for that? I'd be looking at max 10m (30ft).
The characteristic impedance is 100 ohms, which could be padded for AES. The cable has very low xtalk and loss anyway, so presumably jitter wouldn't be that bad either.

Does anybody have any experience with that?

Thanks for your inputs,

Jan Didden
__________________
I won't make the tactical error to try to dislodge with rational arguments a conviction that is beyond reason - Daniel Dennett
Check out Linear Audio Vol 7!
  Reply With Quote
Old 9th March 2009, 04:28 PM   #2
phofman is offline phofman  Czech Republic
diyAudio Member
 
Join Date: Apr 2005
Location: Pilsen
I have experienced great results with shielded Cat5 (STP) for S-video cables, e.g. http://www.avforums.com/forums/inter...onnectors.html
  Reply With Quote
Old 10th March 2009, 05:29 PM   #3
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Hey Jan - IIRC the BBC did a lot of testing on this. They found that Cat5 was just fine for AES/EBU digital.

I don't remember the distances, but 10M isn't far.

See if you can google it up.
  Reply With Quote
Old 11th March 2009, 08:53 AM   #4
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Thanks - I'll see if I can chase that up.

Jan Didden
__________________
I won't make the tactical error to try to dislodge with rational arguments a conviction that is beyond reason - Daniel Dennett
Check out Linear Audio Vol 7!
  Reply With Quote
Old 11th March 2009, 06:27 PM   #5
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Good, please post what you find.
  Reply With Quote
Old 11th March 2009, 06:39 PM   #6
HK26147 is offline HK26147  United States
diyAudio Member
 
Join Date: Jan 2008
Quote:
...that involves sending power, control and AES audio over cabling
What is the power part?
The narrow gauge ( 22 - 24 ) would have too much DCR and too little ampacity, for much power.
  Reply With Quote
Old 11th March 2009, 07:15 PM   #7
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally posted by HK26147

What is the power part?
The narrow gauge ( 22 - 24 ) would have too much DCR and too little ampacity, for much power.
It only needs to supply some 100mA, so even with 1 ohms DCR I lose just 100mV. The DCR is about 60 milliohms/meter and current carrying capability is about 3-4amps.

BTW What's 'ampacity'?

Jan Didden
__________________
I won't make the tactical error to try to dislodge with rational arguments a conviction that is beyond reason - Daniel Dennett
Check out Linear Audio Vol 7!
  Reply With Quote
Old 11th March 2009, 08:07 PM   #8
HK26147 is offline HK26147  United States
diyAudio Member
 
Join Date: Jan 2008
Ampacity is an industrial wiring geek speak acronym for Ampere-caPacity
Basically a conductive path like a pipe can only handle so much current.
See
http://www.powerstream.com/Wire_Size.htm
Use the Voltage Drop Calculator by Gerald Newton
Insert the appropriate wire size and the power scheme ( ie Volt DC or AC ) and you get the Voltage drop, Voltage at load end of circuit, Per Cent voltage drop, Wire cross section in circular mils

The general guideline ( wire-size vs voltage drop ) is make sure the voltage loss due to wire size is less than 2%. HV becomes more efficient than LV, but then other issues pop up.
For DC power: DCR is a huge problem. AC power has other issues.
  Reply With Quote
Old 11th March 2009, 08:30 PM   #9
HK26147 is offline HK26147  United States
diyAudio Member
 
Join Date: Jan 2008
Default Just to show I didn't make the word up

This might be appropriate to your scenario:
http://www.hescs.com/katalogen/91.htm

BTW: I have enjoyed your many contribution to audio, especially in the pages of AA, & more recently AudioXpress

Syd
  Reply With Quote
Old 12th March 2009, 02:15 AM   #10
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
The AES - BBC study is here:
http://www.aes.org/e-lib/browse.cfm?elib=10275

Only having read the summary, it seems that Cat5 cables are as good, if not better, for AES/EBU digital than the traditional cables.

I say go for it!
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
cheap cat5e cable for speaker cable fishline Full Range 6 19th May 2009 07:42 PM
Cat5e Line Level Standards? FurrorNos Everything Else 15 14th April 2009 06:14 PM
CAT5e Cable fun! Line level. Pano Everything Else 3 25th March 2008 08:32 AM
Ethernet with cat5E to USB-Dac ? lykkedk Digital Source 0 1st May 2007 06:15 PM
ssabripo's DIY Speaker cables Tutorial (cat5e based): Audiophile wires on the cheap! ssabripo Everything Else 1 26th October 2006 02:32 PM


New To Site? Need Help?

All times are GMT. The time now is 07:53 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2