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Old 6th May 2005, 03:30 PM   #1
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Default Please help dcx2496 + S/PDIF

Hi All

Time for another probably embarassing question.
I want to run the digital output off my CD player (RCA socket - s/pdif i think...?) into the digital input of my DCX 2496 . (XLR)
Is there any schematic wiring diagram that shows how to wire up an RCA connector to an XLR in this DIGITAL application??? as opposed to analog??
I get the impression it should be pretty easy and may not even require transformers etc.


Many thanks in advance

Cheers
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Old 6th May 2005, 04:06 PM   #2
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Well, there is 'works' and then there is 'works properly'. I hate to admit it, but right now I'm using a plain-vanilla rca-to-xlr cable, and it 'works' in the sense that it passes the signal.

The 'right' way to do it is to get
a) rca->bnc 75Ohm cable
b) 75-110 xformer

Markertek sells all this stuff, and there are doubtless other sources. This was my plan, right up until I got the wrong gender on the xformer. D'oh!
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Old 6th May 2005, 04:48 PM   #3
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Hi DWK123

Thanks ofr your answer.
I agree with your comments of "works" etc.
But to get the experiment of the ground could you please advise which part of the RCA is wired to what part of thr XLR??


Many thanks and cheers from down under
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Old 6th May 2005, 08:06 PM   #4
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If you are brave, and up for an experiment, I would suggest ditching the XLR, as it "looks" terrible to a SPDIF signal. In which case, you would still use a decent transformer, or even a mediocre one, and just adjust the impedance to be 75 ohms. Pulse transformers that change impedance usually don't work very well.

There may be some threads in the digital forum the last month or so with some circuits that will work. If not, maybe I can scribble one down.

Jocko
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Old 7th May 2005, 01:23 AM   #5
Rashiki is offline Rashiki  United States
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Someone on audiocircle pointed me towards another Behringer product that may do exactly what you want. They have a product called the ultramatch SRC2000 (and a newer version called the SRC2496) which will, among other things, convert from RCA or optical SPDIF to XLR AES/EBU.

http://www.behringer.com/SRC2000/index.cfm

http://www.behringer.com/SRC2496/index.cfm

I've ordered the SRC2496, but haven't received it yet. it looks like a pretty cool device -- sample rate conversion and jitter removal and it also works as a DAC and ADC, all for $129.

The SRC2000 is cheaper ($60-$70), but doesn't work as a DAC or ADC and only resamples to 32 or 44.1kHz.

-Rob
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Old 7th May 2005, 03:05 AM   #6
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Thanks for all the replies and wisdom.
The dcx spec say it will take spdif.. i ws hoping it could do so without major additional expense .
I beleive some may have just plugged it in - and it worked , my question was how did they wire up the plugs.
Mind you the SRC2496 looks interesting (but $ here)
Cheers
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Old 9th May 2005, 07:04 AM   #7
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Hi george a,

This might work. I am new to SPDIF, but to me it makes sense. I suppose you should do a conversion "as soon as possible" - close to the RCA connector, and feed the signal as balanced most of the run.

This might be wrong, Jocko, your opinion please...

Regards,
Extreme_Boky
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File Type: jpg rca_to_xlr.jpg (16.9 KB, 555 views)
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Old 9th May 2005, 09:33 AM   #8
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Thanks for all the clues guys

Any ideas where i can find a suitable transformer in the land of Oz(tralya)

Cheers
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Old 9th May 2005, 10:24 AM   #9
dangus is offline dangus  Canada
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It has been rumoured that the transformers on ethernet cards will work for S/PDIF.
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Old 9th May 2005, 11:44 AM   #10
ergo is offline ergo  Estonia
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To give some ideas and pictures how to implement what is already suggested here.

Ergo's DCX2496 mods

Regards,
Ergo
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