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    Noise Margin

    This is a discussion on Noise Margin within the Sky Broadband help forums, part of the Sky Broadband help and support category; evening everyone, I have read alot of items re sky broadband to try and fix my recurring bad connection problems, ...

    1. #1
      The Muppet's Avatar
      The Muppet is offline Sky User Member
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      Cool Noise Margin

      evening everyone,
      I have read alot of items re sky broadband to try and fix my recurring bad connection problems, the one I am aiming for at this minute relates to the 'Noise Margin' setting within the router setup. No where can I find what the recommended readings should be.

      I have read the sticky about re-booting which is fine but because I can't find out what it should be I dont know if I need to.

      My stats are below - can anyone tell me if this is within tollerance?

      The bottom value varies between low 6's and 9's

      Many thanks

      Dave

      -----------------------------------------------------------------

      System Up Time 01:25:29
      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 1639 1480 0 513 1017 00:11:36
      LAN 10M/100M 1089 0 0 35 0 01:25:27
      WLAN 11M/54M 6851 6089 0 1178 391 00:46:52


      ADSL Link Downstream Upstream
      Connection Speed 5312 kbps 768 kbps
      Line Attenuation 18.0 db 11.5 db
      Noise Margin 9.1 db 13.0 db


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    3. #2
      Saturday's Avatar
      Saturday is offline Sky User Super Mod
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      Re: Noise Margin

      Welcome to the forum

      Your router has a target noise margin of 6.9db. It operates well at this level and down to ~6db. Below this problems occur.

      However, as you have probably noticed, the noise margin varies through the day.

      A "good" noise margin is one that never drops below about 6.2db. If you've set your router to hold at between low 6's and 9's then that sounds fine.

      One other point though. Your attenuation figure is fantastic. If that's being reported correctly by your router you should be connecting at ~16000kbps on Max.

      My suggestion is to test the connection speed using your test socket which you will find behind the faceplate of your master socket (assuming you have an NTE5)
      Last edited by Saturday; 13-01-07 at 05:46 PM.

    4. #3
      lomaxgr's Avatar
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      Re: Noise Margin

      Hi!

      Basically i was having same problem my friend, and out of 'luck' sky decided to cut my details from their database, forcing me to ring up and get through to tier 3. As they were looking for the problem, the tier 3 member of staff decided to limit my max sync at 12.5mbs, and my noise margin now doesnt drop below 10 - ive no doubt this isnt a coincidence, so just ring up sky and ask to be limited at 12.5mbs, its more than enough!

      P.S It didnt fix my original problem lol

    5. #4
      Saturday's Avatar
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      Re: Noise Margin

      Actually, you were having the opposite problem.

      Sky lowered your connection speed (capped it) which raised your noise margin.

      The Muppet has a connection speed way below what it should be. Sky capping his speed would simply make this worse.

      If you'd like to understand the relationship between speed and noise margin you might like to start with this.

      @muppet - please follow my advice if you'd like to sort this.

     

     

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