Db25 to XLR Digi 192K Interface Cable Pin 2 or 3 hot?

[david correia]

I have 2 standard XLR breakout cables with male DB-25's that plug into
Digidesign 192K interfaces. My question: are these cables pin 2 or pin 3
hot? (My studio had both, as I had an Otari 24 track.)

I am not clear what the numbering system is for the male db25 on the
cable. So lets say the top row is the one with the 13 male pins, the
bottom 12.

Pin 1 of the XLR of input and output of channel 1 goes to bottom row,
the pin all the way to the right.

Pin 2 of channel 1 goes to the bottom row, the 2nd from the right.

Pin 3 of channel 1 goes to the top row, the 2nd from the right.

Is the cable pin 2 or pin 3 hot?

Thanks.





David Correia
www.Celebrationsound.com

[geoff]

david correia wrote:
> I have 2 standard XLR breakout cables with male DB-25's that plug into
> Digidesign 192K interfaces. My question: are these cables pin 2 or
> pin 3 hot? (My studio had both, as I had an Otari 24 track.)
>
> I am not clear what the numbering system is for the male db25 on the
> cable. So lets say the top row is the one with the 13 male pins, the
> bottom 12.
>
> Pin 1 of the XLR of input and output of channel 1 goes to bottom row,
> the pin all the way to the right.
>
> Pin 2 of channel 1 goes to the bottom row, the 2nd from the right.
>
> Pin 3 of channel 1 goes to the top row, the 2nd from the right.
>
> Is the cable pin 2 or pin 3 hot?


If it's anything other than 2-Hot, and not emblazoned somewhere in BIG
LETTERS, then they should be shot !

(Sorry, I don't actually know....)

geoff

[Mike Rivers]

On 2/27/2011 10:46 PM, david correia wrote:
> I have 2 standard XLR breakout cables with male DB-25's that plug into
> Digidesign 192K interfaces. My question: are these cables pin 2 or pin 3
> hot? (My studio had both, as I had an Otari 24 track.)

When it comes to AES/EBU, there's no concern for "Pin (n)
hot." The way the data works, inverting the polarity of the
data stream does not invert the polarity of the audio. Since
AES/EBU is supposed to be (and generally is)
transformer coupled, there's no concern with which pin is
closer to ground.

There are a few different wiring standards for 8-pair D-sub
digital cables. You prompted me to dig up a list of the
various pinouts that I compiled a while back and posted it
on my web page:

http://mikeriversaudio.files.wordpress.com/2011/02/db25_audio_snake_pinouts.pdf

> I am not clear what the numbering system is for the male db25 on the
> cable. So lets say the top row is the one with the 13 male pins, the
> bottom 12.

When looking at the outside (pins), Pin 1-13 is the top row,
14-25 is the bottom row. Most connectors, if you look
closely enough, have the pin numbers molded into the pin block.



--
"Today's production equipment is IT based and cannot be
operated without a passing knowledge of computing, although
it seems that it can be operated without a passing knowledge
of audio." - John Watkinson

http://mikeriversaudio.wordpress.com - useful and
interesting audio stuff

[david correia]

In article >,
Mike Rivers > wrote:

> On 2/27/2011 10:46 PM, david correia wrote:
> > I have 2 standard XLR breakout cables with male DB-25's that plug into
> > Digidesign 192K interfaces. My question: are these cables pin 2 or pin 3
> > hot? (My studio had both, as I had an Otari 24 track.)
>
> When it comes to AES/EBU, there's no concern for "Pin (n)
> hot." The way the data works, inverting the polarity of the
> data stream does not invert the polarity of the audio. Since
> AES/EBU is supposed to be (and generally is)
> transformer coupled, there's no concern with which pin is
> closer to ground.
>
> There are a few different wiring standards for 8-pair D-sub
> digital cables. You prompted me to dig up a list of the
> various pinouts that I compiled a while back and posted it
> on my web page:
>
> http://mikeriversaudio.files.wordpress.com/2011/02/db25_audio_snake_pinouts.pd
> f
>
> > I am not clear what the numbering system is for the male db25 on the
> > cable. So lets say the top row is the one with the 13 male pins, the
> > bottom 12.
>
> When looking at the outside (pins), Pin 1-13 is the top row,
> 14-25 is the bottom row. Most connectors, if you look
> closely enough, have the pin numbers molded into the pin block.


Thanks for the suggestion to look closely, as one of the connectors did
have nearly invisible numbers.

Pin 2 of channel 1's XLR goes to 24. Which makes it pin 2 hot. (Pin 1
goes to 25, Pin 3 goes to 12. These were 8 channel analog audio cables.)

What made me unsure was that the diagrams I found on the net were for
the gear's outputs, and not for the cable, which reverses the order.

I was pretty sure these guys were pin 2 hot, as I had my tech resolder
the pin 3 hot ones last summer, but I wanted to be thorough. Cuz ya
never know.



David Correia
www.Celebrationsound.com

[Francois Barvec]

hello,

maybe, this link coul be useful:
http://francois.barvec.free.fr/aes/standards_AES%20subd25_XLR.pdf

I have collected some Sub_D25-XLR pinout standards: Tascam/Digidesign,
Merging, Yamaha
& Euphonix

best regards

François