DCX2496 digital input question

[honfatboy]

If I am correct, I cannot go from a coax digital output to the digital input on the DCX2496?

I want to use the digital input, but only have s/pdif outputs, and zero money to spend on expensive converters.

 

[zanash]

Buy a suitable xlr plug .......£2

buy an rca phono socket ....£2

some wire ...£0

mate the two ! [could use a short cable but the ones I've made the rca shaft fits snuggly in the xlr body.

connect pins 1 and 3 in the xlr tp rca ground and pin two to signal.

you will find this a very acceptable solution [I have].

 

[rfbrw]

If I am correct, I cannot go from a coax digital output to the digital input on the DCX2496?

It seems the '2496 does not think much of the puny levels offered by SPDIF

 

[AndrewT]

Hi,
there is a difference in signal level between SPdif and AES of about 12 to 14db. There is also the difference in impedance of 75ohm to 110ohm.

I think strapping the DCX input cold pin to ground forces the input stage to double gain. That leaves just 6 to 8db signal level and a small gain due to impedance mismatch.

44kHz sampling may be ok with the impedance mismatch but any higher may have reflection problems causing signal misreads.

However, IT IS WORTH TRYING the cheap way. It may work.

 

[rfbrw]

The DCX2496 expects 0.3 to 10 vpp across 110R. SPDIF is around is 0.5 to 1 vpp across 75R. I'd seek to up the level a bit.
Grounding one leg will gain you nothing. That only works with certain types of output stage.

 

[zanash]

suggest you read chapter 5 page 20 of the manuel.


as with the other behringer 2496 components

 

[rfbrw]

suggest you read chapter 5 page 20 of the manuel.


as with the other behringer 2496 components

Doesn't apply to a transformer coupled digital signal.

 

[zanash]

are you saying it won't work ?

 

[rfbrw]

You'll have to be clearer.

 

[zanash]

All I'm saying is it has to be worth a try .....at less than a tenner

if it dosn't work the only solution is to build or buy a transformer converter.

But on the bassis that the 2496 units use similar curcuits its got too be worth a go

 

[ergo]

DCX2496 SPDIF in

I have modded my DCX2496 for SPDIF and it works without problems....

Ergo

 

[zanash]

Thanks for confirming that
I thought it would ...but I could not be certain as I don't have access to a dcx to test my hypothesis!