Your forum username:
Do you already have an account?
Forgot your password?
  • Log in or Sign up


    Welcome to Sky User - The Unofficial Support Forum for everything Sky! - Proudly helping over 65k members.


    Advertisement

    Page 1 of 6 123 ... LastLast
    Results 1 to 10 of 59

    Noise margin decreasing

    This is a discussion on Noise margin decreasing within the Sky Broadband help forums, part of the Sky Broadband help and support category; Hi, just wondering if anyone has any suggestions as to what's happening to my noise margin: ADSL Link Downstream Upstream ...

    1. #1
      gareth86's Avatar
      gareth86 is offline Sky User Member
      Exchange:
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear V2 DG934G
      Sky TV: Sky Basic
      Join Date
      Dec 2008
      Posts
      108
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Noise margin decreasing

      Hi, just wondering if anyone has any suggestions as to what's happening to my noise margin:

      ADSL Link Downstream Upstream
      Connection Speed 14330 kbps 766 kbps
      Line Attenuation 28 db 15 db
      Noise Margin 8 db 17 db

      Roughly a month ago I installed an ADSL master faceplate, which bumped my noise margin up to 12db. That was consistent up until a few days ago - now during the daytime it's gone to 10db, and at night varies between 7db-9db.

      There are roadworks on a turning near the cabinet, do you think that they could have any effect? If not could anything else be causing this? Just a tad weird.. I know it's not much to worry about but prefer a stable connection rather than extra speed, hence the 12db.

      Thanks.
      Last edited by gareth86; 07-05-10 at 11:42 AM.
      Gareth


    2. Advertisement
    3. #2
      joss's Avatar
      joss is offline Sky User Member
      Exchange: Adwick-le-Street
      Broadband ISP: sky max
      Router: Sagem F@ST 2504
      Sky TV: Sky+HDmultiroom
      Join Date
      May 2009
      Location
      South Yorkshire
      Posts
      621
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: Noise margin decreasing

      Absolutely nothing to worry about here. Go and have a good read here ::. Kitz - ADSL Router Line Stats .:: this will help you to understand how it all works.

    4. #3
      gareth86's Avatar
      gareth86 is offline Sky User Member
      Exchange:
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear V2 DG934G
      Sky TV: Sky Basic
      Join Date
      Dec 2008
      Posts
      108
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: Noise margin decreasing

      Thanks, but I know how it all works Surely a noise margin dropping 12db to 7db is not normal though... I am 100% confident we haven't changed anything. Only have one socket in the house which is the master socket, always have always will. The only thing I could think of was roadworks so I was seeking opinion.
      Last edited by gareth86; 07-05-10 at 11:42 AM.
      Gareth

    5. #4
      joss's Avatar
      joss is offline Sky User Member
      Exchange: Adwick-le-Street
      Broadband ISP: sky max
      Router: Sagem F@ST 2504
      Sky TV: Sky+HDmultiroom
      Join Date
      May 2009
      Location
      South Yorkshire
      Posts
      621
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: Noise margin decreasing

      Lots of things can effect the SNR don't beat your self up over the odd fluctuation

      If you want you could run Routerstats and monitor your SNr here is the link http://www.vwlowen.co.uk/files/routerstatslite46.zip for Netgear DG934 (Sky Broadband)

    6. #5
      Isitme's Avatar
      Isitme is offline Sky User Moderator
      Exchange: Bannockburn
      Broadband ISP: Sky Fibre Unlimited
      Router: Sky Hub SR102
      Sky TV: Sky+ HD
      Join Date
      Dec 2006
      Location
      Central Scotland
      Posts
      34,131
      Thanks
      64
      Thanked 1,641 Times in 1,602 Posts

      Re: Noise margin decreasing

      5dbs is a big swing, but as you surmise it may well be caused by the nearby roadworks. You are in the fortunate position of have noise margin to spare so it should not effect you. Wait till the disturbance is over and see if it improves.

      TomD


      Please note the views and recommendations in my posts are my own and in no way reflect the views of SkyUser.


      Useful Utilites

      http://www.nirsoft.net/utils/wifi_information_view.html/ TCPOptimiser /Test Socket

      Note - When downloading always select the Custom install or you will end up with stuff you don't want.





    7. #6
      gareth86's Avatar
      gareth86 is offline Sky User Member
      Exchange:
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear V2 DG934G
      Sky TV: Sky Basic
      Join Date
      Dec 2008
      Posts
      108
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: Noise margin decreasing

      Thanks both of you.

      I'll monitor it for a while too.
      Last edited by gareth86; 07-05-10 at 11:42 AM.
      Gareth

    8. #7
      neilmcl's Avatar
      neilmcl is offline Sky User Member
      Exchange: Sherwood
      Broadband ISP: O2 Standard
      Router: Non Sky Router
      Sky TV: Sky+ HD
      Join Date
      Mar 2008
      Location
      Nottingham
      Posts
      990
      Thanks
      3
      Thanked 0 Times in 0 Posts

      Re: Noise margin decreasing

      You may have read my thread Speed Dropping Overnight in which I describe a similar problem. I'm getting a constant, healthy noise margin of around 14db during the day but starts to plummet during the evening until eventually the connection drops or I have to reboot the router to clear the errors off the line.

      Having had a chat with the Sky Talk support team regarding a related incident I'm beginning to be convinced that it may be my street lighting that's causing the problem, as it seems to be happening from lighting up time onwards. This is a bit of concern as whilst it's not a major problem now it'll only get worse later on in the year as the nights draw in.

    9. #8
      Isitme's Avatar
      Isitme is offline Sky User Moderator
      Exchange: Bannockburn
      Broadband ISP: Sky Fibre Unlimited
      Router: Sky Hub SR102
      Sky TV: Sky+ HD
      Join Date
      Dec 2006
      Location
      Central Scotland
      Posts
      34,131
      Thanks
      64
      Thanked 1,641 Times in 1,602 Posts

      Re: Noise margin decreasing

      I'm beginning to be convinced that it may be my street lighting that's causing the problem, as it seems to be happening from lighting up time onwards.
      That is quite correct, it is a fact that as the sun goes down, the noise on phone lines goes up. Unfortunately there is not a lot you can do about it, except make sure that your own lighting is in good condition.

      TomD


      Please note the views and recommendations in my posts are my own and in no way reflect the views of SkyUser.


      Useful Utilites

      http://www.nirsoft.net/utils/wifi_information_view.html/ TCPOptimiser /Test Socket

      Note - When downloading always select the Custom install or you will end up with stuff you don't want.





    10. #9
      gareth86's Avatar
      gareth86 is offline Sky User Member
      Exchange:
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear V2 DG934G
      Sky TV: Sky Basic
      Join Date
      Dec 2008
      Posts
      108
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: Noise margin decreasing

      Thanks guys, yeah it could well be street lights. Using the monitor I noticed it got worse at night at 10:15pm and same today. Slightly confused as to why just after half 10 it's gotten slightly better, but still not as good as during the day. At quarter past 10 though it's real bad.

      I'll keep an eye out on anything else that could be causing this. Thanks for your help.
      Last edited by gareth86; 07-05-10 at 11:42 AM.
      Gareth

    11. #10
      gareth86's Avatar
      gareth86 is offline Sky User Member
      Exchange:
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear V2 DG934G
      Sky TV: Sky Basic
      Join Date
      Dec 2008
      Posts
      108
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: Noise margin decreasing

      Hi,

      It's now at 7db and now dropping to 4db
      It began when it randomly disconnected for about 10 minutes, and it just happened for a second time, roughly an hour apart.

      When it's 'disconnected' the router says this:
      ADSL Firmware Version 7.03.01.66
      Modem Status Connected
      DownStream Connection Speed 0 kbps
      UpStream Connection Speed 0 kbps

      ADSL Link Downstream Upstream
      Connection Speed 0 kbps 0 kbps
      Line Attenuation 28 db 15 db
      Noise Margin 2147483647 db 16 db
      Weird because it says connected, but with a sync of 0. Anyone know what's going on?
      Last edited by gareth86; 07-05-10 at 11:42 AM.
      Gareth

     

     
    Page 1 of 6 123 ... LastLast

    Tags for this Thread

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •  
    SkyUser - Copyright © 2006-2017. SatDish and NewsreadeR | SkyUser is in no way affiliated with Sky Broadband / BSkyB
    RIPA NOTICE: NO CONSENT IS GIVEN FOR INTERCEPTION OF PAGE TRANSMISSION