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    Is this good or bad?

    This is a discussion on Is this good or bad? within the Sky Broadband help forums, part of the Sky Broadband help and support category; I had my line enabled over the weekend as stated in another post and my downstream noise margin was in ...

    1. #1
      acoolwelshbloke's Avatar
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      Is this good or bad?

      I had my line enabled over the weekend as stated in another post and my downstream noise margin was in the range of 6.9db - 7.1db but I have noticed it has slowly been dropping as low as 3.9db but has now risen to around 4.3db

      It simply keeps changing, is this due to the 10 day line training as im on the connect package?

      Edit: I just rebooted my sky router and my downstream noise margin has changed from 3.9db to 5.7db but has fallen to 5.3db?
      Last edited by acoolwelshbloke; 19-02-07 at 06:21 PM.


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    3. #2
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      Re: Is this good or bad?

      Hiya try some light reading from the sticky wiki

      Some Useful Info & tools
      Rosie
      12591 kb/s Download 579 kb/s upload

    4. #3
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      Re: Is this good or bad?

      Hi sassylady and thanks for the link, however I had already read that post and it makes an interesting read.

      However it does not really give an answer to whether or not a persons downstream noise margin should deteriorate or not over the ten day training period.

      I know I'm getting crap speeds of 1.5MB because of the ten day training period but I'm not sure if the downstream noise margin fluctuations I'm getting are being caused by the ten day training period or if it's a problem with my line.

    5. #4
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      Re: Is this good or bad?

      From that link

      Days 1 - 10
      Reboot router daily
      Forget about stability, transfer speeds, latency
      Basically I would ignore all of your stats until after the 10 days. (But I only know what I've read here, I haven't had Connect)

    6. #5
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      Re: Is this good or bad?

      I think your right, I have had to reboot my router about ten times tonight as I have been loosing connection because my Download Noise Margin has dropped as low as 2.0db!

      I noticed every time I rebooted my Downstream Connection Speed has reduced each time and my Downstream Noise Margin has risen. Here are my stats now:

      ADSL Link Downstream Upstream
      Connection Speed 4864 kbps 448 kbps
      Line Attenuation 48.0 db 28.5 db
      Noise Margin 8.1 db 20.0 db

      My Downstream Noise Margin currently fluctuates between 6.8 - 8.1db which is better than before, I suddenly realized that my line can only handle 4 - 4.5MB speeds anyway so no wonder I was having problems earlier.

      It is clearly the ten day training period doing it's job!

      Still running at just 1.2MB though, same as when I had standard AOL BB a few years ago. Will be glad to see the back of this training session lol!
      Last edited by acoolwelshbloke; 19-02-07 at 10:56 PM.

    7. #6
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      Re: Is this good or bad?

      It's a normal part of the training. When the router syncs higher the noise margin drops. If this goes below 6 it will resync at a slower speed and thus the noise margin will go above 6 again. The time of day makes a difference though so tomorrow the margin may be higher so it will resync to a higher speed, which will drop the margin again. You will find that the margin drops lowest during peak times. Eventually the auto process work the averages out. Ppl who are closer to the exchange with notice less resyncs than ppl who hover around the 6db mark. I havent moved to sky yet and have been with plusnet for a year on maxADSL and I still see the odd drop under 6 which causes a resysnc. Doesnt cause me issues though. mainly it stays constant and just above 6.

    8. #7
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      Re: Is this good or bad?

      I read in the above posetd link that You can see your sync speed by visiting the BT checker?

      Can anyone give me the link?

    9. #8
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      Re: Is this good or bad?

      Why not just look in your router?

      192.168.0.1 in the address bar of your web browser. username is admin, password is sky

    10. #9
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      Re: Is this good or bad?

      And don't forget Mognut's utility to set your noise margin etc as you wish
      Sky Netgear DG834GT utility version 0.4
      Rosie
      12591 kb/s Download 579 kb/s upload

    11. #10
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      Re: Is this good or bad?

      Quote Originally Posted by sassylady View Post
      And don't forget Mognut's utility to set your noise margin etc as you wish
      Sky Netgear DG834GT utility version 0.4
      Thanks for that, anyone have any idea what would be a good noise margin?

      I know the higher the better, I want a good stable connection even if it means having a lower download speed.

     

     
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