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    first 24 hours DLM

    This is a discussion on first 24 hours DLM within the Sky Broadband help forums, part of the Sky Broadband help and support category; Originally Posted by IWasNotTheEnemy If router chipset isn't matched to the exchange gear that alone can have it falling over ...

    1. #11
      snadge's Avatar
      snadge is offline Sky User Member
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      Re: first 24 hours DLM

      Quote Originally Posted by IWasNotTheEnemy View Post
      If router chipset isn't matched to the exchange gear that alone can have it falling over all over the place
      true enough... but I would imagine I get 3db, my friend is on SKY SVBN using exact same router iam about too use with broadcom chipset and he holds 3db... although I do recall he had problems getting it any lower... i will be happy with 3-4db anyway, like i say a 'round-a-bout' figure - the lower attenuation might make up for it, just lukin at one screenshot of my o2 sync and it was 27db at one point (26.5-27db)... now im 25db (25-25.5db) , so that should help a bit - i noticed though even if you could tweak an extra 2.5Mb sync rate on 2-3db SNR it did not equate the same in throughput...only about 1-1.5Mbps

      my DLM seems to have started today (doesnt say so in MySky but thats probs just a delay) - im now on 6Mb/800k/43ms (yesterday was 4Mb/600k/47ms)
      - Hardware - Netgear DG834Nv1
      - Line Attenuation - 27.5db
      - Sync Rate - 17,600k
      - Noise Margin - 7db
      - Latency - 28ms


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    3. #12
      Isitme's Avatar
      Isitme is offline Sky User Moderator
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      Re: first 24 hours DLM

      i noticed though even if you could tweak an extra 2.5Mb sync rate on 2-3db SNR it did not equate the same in throughput...only about 1-1.5Mbps
      That's because it would be generating CRC errors, which means the data has to be resent, thus slowing the connection down.

      TomD


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    4. #13
      snadge's Avatar
      snadge is offline Sky User Member
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      Re: first 24 hours DLM

      Quote Originally Posted by Isitme View Post
      That's because it would be generating CRC errors, which means the data has to be resent, thus slowing the connection down.
      is it? - i never noticed any increase of CRC or FEC counts in DMT, but then again I dont recall doing a before & after check of errors..only that errors were very low after syncind with a 2-3db SNR, unfortunately Iam unable to check before/after now for obvious reasons lol... perhaps I can try it with my SKY connection later when DLM has finished and Iam on my GT

      thanks Tom
      - Hardware - Netgear DG834Nv1
      - Line Attenuation - 27.5db
      - Sync Rate - 17,600k
      - Noise Margin - 7db
      - Latency - 28ms

     

     
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