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Q: How long can I run a digital line?



 
 
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  #1 (permalink)  
Old February 6th 04, 01:06 PM posted to uk.rec.audio
Jay
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Posts: 4
Default Q: How long can I run a digital line?

hello.

I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could run
six metres.

Is this way out or is this possible?

Thanks

J
  #2 (permalink)  
Old February 6th 04, 02:13 PM posted to uk.rec.audio
Dave Plowman
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Posts: 735
Default Q: How long can I run a digital line?

In article ,
Jay wrote:
I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could
run six metres.


Is this way out or is this possible?


No problem. Use co-ax rather than optical - it's cheaper.

--
*The man who fell into an upholstery machine is fully recovered.*

Dave Plowman London SW 12
RIP Acorn
  #3 (permalink)  
Old February 6th 04, 02:17 PM posted to uk.rec.audio
Ian Molton
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Posts: 1,243
Default Q: How long can I run a digital line?

On Fri, 6 Feb 2004 13:06:49 +0000 (UTC)
Jay wrote:


I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could run
six metres.


ought to work. You'll know when it doesnt.
--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.
  #4 (permalink)  
Old February 6th 04, 02:49 PM posted to uk.rec.audio
TCS
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Posts: 32
Default Q: How long can I run a digital line?

On Fri, 6 Feb 2004 13:06:49 +0000 (UTC), Jay wrote:
hello.


I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could run
six metres.


No problem. I've run 30' feet using rg58 with perfect results.



Is this way out or is this possible?


Thanks


J

  #5 (permalink)  
Old February 6th 04, 02:53 PM posted to uk.rec.audio
Ian Molton
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Posts: 1,243
Default Q: How long can I run a digital line?

On Fri, 06 Feb 2004 14:13:23 +0000 (GMT)
Dave Plowman wrote:

I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could
run six metres.


Is this way out or is this possible?


No problem. Use co-ax rather than optical - it's cheaper.


'scuse me? I picked up a 3m optical cable for 6ukp.

they were selling 12m ones for ~20 IIRC.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.
  #6 (permalink)  
Old February 6th 04, 03:16 PM posted to uk.rec.audio
Nutter
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Posts: 24
Default Q: How long can I run a digital line?



On Fri, 6 Feb 2004 13:06:49 +0000 (UTC), Jay wrote:

hello.

I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could run
six metres.

Is this way out or is this possible?

Thanks

J

First off, use Coax.
Second, any old piece of crap phono leed will do. As for length I'm
guessing 6m will not be a problem as the signal is digital. If you can
hear a sound with no skips or breaks, then the cable is working
perfectly.


Ray.


  #7 (permalink)  
Old February 6th 04, 04:08 PM posted to uk.rec.audio
Nutter
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Posts: 24
Default Q: How long can I run a digital line?



On Fri, 6 Feb 2004 14:53:42 +0000, Ian Molton wrote:

On Fri, 06 Feb 2004 14:13:23 +0000 (GMT)
Dave Plowman wrote:

I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could
run six metres.


Is this way out or is this possible?


No problem. Use co-ax rather than optical - it's cheaper.


'scuse me? I picked up a 3m optical cable for 6ukp.

they were selling 12m ones for ~20 IIRC.


MUG ALERT! Oh Dear Ian.

My Digital Coax cable cost me nothing, it was one of those 'free' ones
you get with every Hi-Fi box. Better still you get 2 of them, ones
colored Red and one White. Personally I think the Red one gives a
warmer sound.

Okay, I'll stop taking the **** now.... IT'S A DIGITAL SIGNAL, ANY OLD
PIECE OF ****E WILL DO (for coax)! Which is why on this group, Coax is
prefered, because it does the same thing and the cable costs virtually
nothing.

Ray.

  #8 (permalink)  
Old February 6th 04, 04:31 PM posted to uk.rec.audio
Jay
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Posts: 4
Default Q: How long can I run a digital line?

Nutter wrote in
:



On Fri, 6 Feb 2004 13:06:49 +0000 (UTC), Jay wrote:

hello.

I'd like to run a digital out from my DVD player to a DAC. How long
can this cable be? I can use a coaxial or an optical. I was hoping it
could run six metres.

Is this way out or is this possible?

Thanks

J

First off, use Coax.
Second, any old piece of crap phono leed will do. As for length I'm
guessing 6m will not be a problem as the signal is digital. If you can
hear a sound with no skips or breaks, then the cable is working
perfectly.


Ray.




Excellent. Cheers for the help, people.

I have another question, though. I'll start a new thread....

j
  #9 (permalink)  
Old February 6th 04, 04:55 PM posted to uk.rec.audio
Ian Molton
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Posts: 1,243
Default Q: How long can I run a digital line?

On Fri, 06 Feb 2004 16:08:42 +0000
Nutter wrote:

MUG ALERT! Oh Dear Ian.


WTF are you on about? 20ukp for 12 metres of optic fibre with 'plugs' on
is not bad at all.

Okay, I'll stop taking the **** now.... IT'S A DIGITAL SIGNAL, ANY OLD
PIECE OF ****E WILL DO (for coax)!


ILLITERACY ALERT! I said *optic fibre* not coax.

Which is why on this group, Coax is prefered


Is it? Cant say I've noticed a preference either way.

At least with the optic fibre I dont even have to CARE about wether
noise from my PC will ever reach my DAC (probably wouldnt on coax either
but I like that I dont need to care.

, because it does the same thing and the cable costs virtually nothing.


The Coax can *in theory* transmit more than just the wanted signal (no I
dont mean jitter). Wether it does or not is down to your individual
equipment. This is simply a non-issue with optic fibre.

I didnt buy a 12 m optic fibre anyhow - I bought a 3m one. that 6ukp was
including VAT+PnP IIRC too. Thats a good price for ANY interconnect,
even a coax one.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with
ketchup.
  #10 (permalink)  
Old February 6th 04, 04:59 PM posted to uk.rec.audio
Ian Molton
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Posts: 1,243
Default Q: How long can I run a digital line?

On Fri, 06 Feb 2004 15:16:55 +0000
Nutter wrote:

First off, use Coax.


Or, better, use optic fibre which is just as cheap and eliminates any possibility of transmitting electrical noise between components.

Second, any old piece of crap phono leed will do.


For short lengths. and it really *ought* to be 75 ohm, too. That said, 6m probably counts as short.

As for length I'm
guessing 6m will not be a problem as the signal is digital.


Digital pulses can be *harder* to transmit due to being square waves. just because its digital doesnt make it easier. What it does mean is that if the signal is at all recoverable at the other end it will work *perfectly* (well, close to perfectly in the case of SP/DIF...).

If you can hear a sound with no skips or breaks, then the cable is working perfectly.


Not necessarily. a DAC could well conceal small errors in the signal.


--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.
 




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