Cable delays

Discussion in 'OT Technology' started by Bencorn, Mar 14, 2009.

  1. Bencorn

    Bencorn New Member

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    I was ondering what would be better to do when running a 25 to 50 foot distance with audio and video cables. I can run a long cable from the media center pc to the projector, move the pc to the projector and run a long optical cable, or run an equal distance of both the DVI optical cables? I just want the cable solution that will give the best audio and video synch. Thanks for the help.
     
  2. mobbarley

    mobbarley Active Member

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    you usually have a hard time running video more than about 30 feet, optical audio should be fine if you get a reasonable cable so that there isnt any errors.

    speed of light = 983 571 056 feet per second, no sync problems.
     
  3. CyberBullets

    CyberBullets I reach to the sky, and call out your name. If I c

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    Depends if you're running digital or analog + the insulation of the cable + any RFI may be around.

    We have several 100ft HDMI cables that work fine at our office. (Gaming/Home Theater, projectors and smart boards)
     
  4. deusexaethera

    deusexaethera OT Supporter

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    The type of cable isn't going to cause sync issues either way. Electricity moves at the speed of light too, brojosephat.

    Sync issues are caused by processing latency in the hardware sending and receiving the signals. The only way to avoid it is to not buy cheap shit hardware.
     
  5. mobbarley

    mobbarley Active Member

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    actually the propagation of electric signals through copper is around 1/2 the speed of light - still not an issue. the biggest problem is drift/attenuation of the high frequency signals used in video on a long cable run. you either use big thick high quality cables and hope that you dont have any noise problems etc, or keep the video reasonable short <10M and use long audio cables which should be much more forgiving.
     
  6. deusexaethera

    deusexaethera OT Supporter

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    Hmm.

    Hey mob, got a physics question for you: how fast do the electrons in the wires connecting a wall switch to an overhead lamp move?
     
  7. mobbarley

    mobbarley Active Member

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    very fast yet not the speed of light, again this is both irrelevant AND not how signals in a cable work.
     
  8. Peyomp

    Peyomp New Member

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    They just jiggle.
     
  9. deusexaethera

    deusexaethera OT Supporter

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    Nope. They don't move at all; remember, mains power is alternating current. :p I had great fun catching my college physics professor with this one, and it was his question to begin with!

    In fairness, though, in a direct current application, the electrons move at a rate of a few meters per hour.

    (yes, Peyomp, I know they jiggle; I was referring to macroscopic movement.)
     
  10. mobbarley

    mobbarley Active Member

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    whoopty do you were a useless nerd in school and you are still one?
     
  11. Peyomp

    Peyomp New Member

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    AC is jiggling.
     
  12. deusexaethera

    deusexaethera OT Supporter

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    I'd hardly call knowing what's actually happening in the universe "being a useless nerd", but I understand you're a little pussyhurt about getting the answer wrong. It's okay, it happens to lots of guys.
     
  13. mobbarley

    mobbarley Active Member

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    no you are a useless nerd because you have no idea what you are talking about with anything on this forum, you give people your wrong advice or your stupid opinion all the time and you are still arguing about something completely irrelevant.
     
  14. deusexaethera

    deusexaethera OT Supporter

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  15. Bencorn

    Bencorn New Member

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    So I shouldn't have a problem as long as I use good cables? My hardware has no problems currently over about 10-15 feet but I jus wanted to make sure it wouldn't be an issue before I dropped a ton of cash on a 50 foot dvi cable or a 50 foot optical cable. From what I've gathered so far is within 50 feet I shouldn't have any worries as long as I'm not using shitty cables. Right?
     
  16. mobbarley

    mobbarley Active Member

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    dvi should be pretty good over that length, and dont buy shitty cables.
     
  17. Bencorn

    Bencorn New Member

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    The ones on monoprice are really good aren't they? I've bought from them before and have been nothing but impressed with the quality of their cables. I just want to make sure m no wasting 50 bucks on a cable that won't work right.
     
  18. deusexaethera

    deusexaethera OT Supporter

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    As long as it's shielded and grounded, it should be fine.
     

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