Flat ribbon cable to transmit AES/EBU audio from the back-end of a PCI card?

skpb · 24th February 2006, 09:15 PM

I need to transmit AES/EBU audio from the back-end of a PCI card to the DB25 connector on the bracket in the neighbouring PCI slot.
What cable should be used?
Is flat ribbon cable OK ?

tubenut · 24th February 2006, 11:33 PM

Sommer cable make a true 110 ohm AES cable that is round and about 5 mm OD (and cheap). That should work and at least is the correct impedance.

skpb · 25th February 2006, 07:35 AM

Please advise flat ( planar ) ribbon cable ( 26 conductors ) with impedance =110 Ohm.
What I found has impedance =92 Ohm.

Since the length of this out-balanced patch cable will be no more than 10 inches, then maybe its presence will not cause much AES / EBU audio degradation?

P.S. AES / EBU transmitter on the back-end of PCI card is transformer-coupled.

tubenut · 25th February 2006, 08:30 AM

I think AES EBU spec allows 10 or 20% impedance variation so maybe you will be ok. Why do you insist on ribbon cable? How many signals?

skpb · 25th February 2006, 08:53 AM

2 Balanced AES/EBU signals IN and 1 Balanced AES/EBU signal OUT.
Round cable is rigid and can accidently pull out the PCI card from the PCI slot.
Ribbon cable is flexible and will not put any strain on PCI card.

AndrewT · 25th February 2006, 09:26 AM

Hi,
are you allowed to fold the ribbon cable? or just gently curve it to it's destination? Does folding affect the impedance? and pass characteristics?

skpb · 25th February 2006, 09:42 AM

Yes, ribbon cable will be curved to it's destination.

Folding might affect the impedance, but if there is a 10 or 20% impedance variation allowed by AES/EBU spec , then this hopefully can be neglected.

tubenut · 25th February 2006, 05:26 PM

I understand the concern about flexibility etc. That is why I recommended you look at the Sommer AES EBU, it is called the Semicolon. Very flexible and designed for AES and DMX. This often means stage work. Stage cables are flexible. Provided the cables are made to fit with no slack you should not have a problem.

My fave AESEBU for little money is Apogee Wyde Eye but it is not flexible enough for your application.

24th February 2006, 09:15 PM	#1
skpb diyAudio Member Join Date: Jan 2006 Location: Moscow	Flat ribbon cable to transmit AES/EBU audio from the back-end of a PCI card? I need to transmit AES/EBU audio from the back-end of a PCI card to the DB25 connector on the bracket in the neighbouring PCI slot. What cable should be used? Is flat ribbon cable OK ?

24th February 2006, 11:33 PM	#2
tubenut diyAudio Member Join Date: Nov 2002 Location: South Africa, Jhb	Sommer cable make a true 110 ohm AES cable that is round and about 5 mm OD (and cheap). That should work and at least is the correct impedance. __________________ Guillaume Croak Audio Exploration

25th February 2006, 08:30 AM	#4
tubenut diyAudio Member Join Date: Nov 2002 Location: South Africa, Jhb	I think AES EBU spec allows 10 or 20% impedance variation so maybe you will be ok. Why do you insist on ribbon cable? How many signals? __________________ Guillaume Croak Audio Exploration

25th February 2006, 09:26 AM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, are you allowed to fold the ribbon cable? or just gently curve it to it's destination? Does folding affect the impedance? and pass characteristics? __________________ regards Andrew T.

25th February 2006, 05:26 PM	#8
tubenut diyAudio Member Join Date: Nov 2002 Location: South Africa, Jhb	I understand the concern about flexibility etc. That is why I recommended you look at the Sommer AES EBU, it is called the Semicolon. Very flexible and designed for AES and DMX. This often means stage work. Stage cables are flexible. Provided the cables are made to fit with no slack you should not have a problem. My fave AESEBU for little money is Apogee Wyde Eye but it is not flexible enough for your application. __________________ Guillaume Croak Audio Exploration


	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

25th February 2006, 07:35 AM	#3
skpb diyAudio Member Join Date: Jan 2006 Location: Moscow	Please advise flat ( planar ) ribbon cable ( 26 conductors ) with impedance =110 Ohm. What I found has impedance =92 Ohm. Since the length of this out-balanced patch cable will be no more than 10 inches, then maybe its presence will not cause much AES / EBU audio degradation? P.S. AES / EBU transmitter on the back-end of PCI card is transformer-coupled.

25th February 2006, 08:53 AM	#5
skpb diyAudio Member Join Date: Jan 2006 Location: Moscow	2 Balanced AES/EBU signals IN and 1 Balanced AES/EBU signal OUT. Round cable is rigid and can accidently pull out the PCI card from the PCI slot. Ribbon cable is flexible and will not put any strain on PCI card.

25th February 2006, 09:42 AM	#7
skpb diyAudio Member Join Date: Jan 2006 Location: Moscow	Yes, ribbon cable will be curved to it's destination. Folding might affect the impedance, but if there is a 10 or 20% impedance variation allowed by AES/EBU spec , then this hopefully can be neglected.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Ribbon made of flexible flat cable	APi	Planars & Exotics	7	21st July 2005 11:59 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read