unbalanced to balanced

[abbey road d enfer]

Do you mean the proaudiodesignforum link or the "Everything you wanted to know about Impedance Balanced outputs but were afraid to ask". The latter cannot be found with google...

That was my tongue-in-cheek title for the proaudiodesignforum link. 

OK, mischievous expat humor...  ;D
And, BTW, do you really expect many people to go through the 21 pages of it? I gave up at page 17... and even then, I just looked at the pix 

 

[ricardo]

And, BTW, do you really expect many people to go through the 21 pages of it? I gave up at page 17... and even then, I just looked at the pix 

No.  Just to #4 with the Belden spec.  It's very unlikely many people will understand mis-terminated transmission lines and even less interested in the effects on audio cable.  ;D

 

[abbey road d enfer]

And, BTW, do you really expect many people to go through the 21 pages of it? I gave up at page 17... and even then, I just looked at the pix 

No.  Just to #4 with the Belden spec.

Unfortunately, this is very misleading. Whatever Belden's justification for publishing the characteristic impedance in unbalanced mode, many people would take for granted that it's the balanced mode specification (I believe you've been caught at that).
I have searched the Belden site trying to find what method they are using for assessing the characteristic impedance, to no avail. Maybe someone with better search abilities could shed some light...? The more I look at it, the more I think they use the unbalanced measurement because their equipment cannot do balanced. I would be glad to be proved wrong.
That is indeed strange because the "digital cables" specs show the balanced impedance, but for "audio" cables it's the unbalanced figure...? 
Apparently they just double the unbal Z for assessing the balanced Z, which is fine on a practical POV.
Still, there should be a warning.

BTW I think the articles by Steve Lampen such as this
http://www.belden.com/blog/broadcastav/Using-Digital-Audio-Cable-For-Analog-Audio_301156.cfm
are worth signalling - nothing groundbreaking but a fair documentary synthesis of the situation.

 

[JohnRoberts]

And, BTW, do you really expect many people to go through the 21 pages of it? I gave up at page 17... and even then, I just looked at the pix 

No.  Just to #4 with the Belden spec.  It's very unlikely many people will understand mis-terminated transmission lines and even less interested in the effects on audio cable.  ;D

It can actually be useful to understand this stuff for digital and other high frequency interfaces where path length and transit time may be significant wrt wavelength.  To be redundant, this is not significant for typical (way too short) audio frequency interfaces.

JR