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 5 123 ... LastLast
    Results 1 to 10 of 46
    Like Tree1Likes

    Sky Hub synced with SNR of 3.0

    This is a discussion on Sky Hub synced with SNR of 3.0 within the Sky Broadband help forums, part of the Sky Broadband help and support category; As the title says my wee sister's Sky broadband on the SVBN with a Sky Hub, has synced with the ...

    1. #1
      nevets5891's Avatar
      nevets5891 is offline Sky User Member
      Exchange: ESNRB
      Broadband ISP: Sky Broadband Unlimited
      Router: Sky Hub SR101
      Sky TV: Sky+HD box
      Join Date
      Jul 2011
      Location
      North Berwick
      Posts
      82
      Thanks
      10
      Thanked 0 Times in 0 Posts

      Sky Hub synced with SNR of 3.0

      As the title says my wee sister's Sky broadband on the SVBN with a Sky Hub, has synced with the exchange to 21 meg with a noise margin of only 3.0. I thought Sky always synced to 7 ish?

      Mine is synced with the same exchange with the Sagem F@ST2304 to 16 meg with a noise margin of 7.0. We're in the same town, a similar distance from the exchange.

      Any ideas why this would be? Is it that the newer Hub allows a lower SNR?


    2. Advertisement
    3. #2
      dholdi's Avatar
      dholdi is offline Sky User Beta tester
      Exchange: LCRIB
      Broadband ISP: Sky Fibre Unlimited Pro
      Router: Sky Hub SR101
      Sky TV: Sky+ HD
      Join Date
      Oct 2006
      Location
      Preston
      Posts
      5,295
      Thanks
      34
      Thanked 47 Times in 45 Posts

      Re: Sky Hub synced with SNR of 3.0

      Quote Originally Posted by nevets5891 View Post
      Any ideas why this would be? Is it that the newer Hub allows a lower SNR?
      I think its more likely to be the dlm process deciding that the level of errors at 3db is acceptable.

      It tried mine at 18.5 meg @ 3 db however went back to 6 db so I would assume the errors at 3db were deemed too high.

      I might be wrong and that's got nothing to do with it but it makes sense to me

      Personally, I would rather have a stable 16.5 meg at 6 db than an unstable 18.5.
      gymno likes this.


    4. #3
      Scubbie's Avatar
      Scubbie is offline Sky User Moderator
      Exchange: 02392
      Broadband ISP: Sky Fibre Unlimited
      Router: Sky Q Hub ER110
      Sky TV: Sky+HD box
      Join Date
      Mar 2010
      Location
      Near Portsmouth
      Posts
      27,895
      Thanks
      810
      Thanked 2,194 Times in 2,064 Posts

      Re: Sky Hub synced with SNR of 3.0

      Sky changed the DLM software around March/April last year to allow the Noise Margin to go as low as 3dB. Since then we have seen many connections go above 20mb and the Noise Margin frequently below 7dB.

      The updated the DLM software again earlier this year and in some cases where the customer has either the Sagem 2504N (with the most recent firmware) or the Sky Hub SR101 the new tweak can kick in and improve the connection speed even more than previously.

      The quality of the line needs to be good. If it isn't, then the DLM software will increase the Noise Margin to compensate.

      We have often seen new connections drop to 3dB during the initial training, then rise to around 6dB. In theory though any figure below 7dB to 3dB can be used now.

      The latest tweak only works on some of Sky's kit at the moment and when you are fully connected. I was on WLR3 so would not have benefited.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

    5. The Following User Says Thank You to Scubbie For This Useful Post:

      nevets5891 (13-05-13)

    6. #4
      gymno's Avatar
      gymno Guest
      Exchange:
      Broadband ISP:
      Router:
      Sky TV:

      Re: Sky Hub synced with SNR of 3.0

      I think i may have benefited from this 2nd update to DLM Scubbie, but my 2504N still has the old firmware:

      ADSL Firmware Version A2pD030n.d23b
      Firmware Version 5.23.1a4N

    7. #5
      nevets5891's Avatar
      nevets5891 is offline Sky User Member
      Exchange: ESNRB
      Broadband ISP: Sky Broadband Unlimited
      Router: Sky Hub SR101
      Sky TV: Sky+HD box
      Join Date
      Jul 2011
      Location
      North Berwick
      Posts
      82
      Thanks
      10
      Thanked 0 Times in 0 Posts

      Re: Sky Hub synced with SNR of 3.0

      Quote Originally Posted by Scubbie View Post
      Sky changed the DLM software around March/April last year to allow the Noise Margin to go as low as 3dB. Since then we have seen many connections go above 20mb and the Noise Margin frequently below 7dB.

      The updated the DLM software again earlier this year and in some cases where the customer has either the Sagem 2504N (with the most recent firmware) or the Sky Hub SR101 the new tweak can kick in and improve the connection speed even more than previously.

      The quality of the line needs to be good. If it isn't, then the DLM software will increase the Noise Margin to compensate.

      We have often seen new connections drop to 3dB during the initial training, then rise to around 6dB. In theory though any figure below 7dB to 3dB can be used now.

      The latest tweak only works on some of Sky's kit at the moment and when you are fully connected. I was on WLR3 so would not have benefited.
      Thanks for that information. I might have so get an SR101 and see if I can benefit from this.

    8. #6
      Scubbie's Avatar
      Scubbie is offline Sky User Moderator
      Exchange: 02392
      Broadband ISP: Sky Fibre Unlimited
      Router: Sky Q Hub ER110
      Sky TV: Sky+HD box
      Join Date
      Mar 2010
      Location
      Near Portsmouth
      Posts
      27,895
      Thanks
      810
      Thanked 2,194 Times in 2,064 Posts

      Re: Sky Hub synced with SNR of 3.0

      I was re-reading the information late last night. Just to clarify at the moment the Sagem 2504N and Sky Hub SR101 are both part of the components for this. It is intended to enable the same feature on the other Sky routers in due course, just not yet.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

    9. The Following User Says Thank You to Scubbie For This Useful Post:

      nevets5891 (13-05-13)

    10. #7
      Shonk's Avatar
      Shonk is online now Sky User Member
      Exchange:
      Broadband ISP: Sky Fibre Unlimited Pro
      Router: Asus RT-AC88U
      Sky TV: Sky+ HD
      Join Date
      Mar 2010
      Posts
      1,460
      Thanks
      7
      Thanked 118 Times in 113 Posts

      Re: Sky Hub synced with SNR of 3.0

      Got a link?

    11. #8
      Scubbie's Avatar
      Scubbie is offline Sky User Moderator
      Exchange: 02392
      Broadband ISP: Sky Fibre Unlimited
      Router: Sky Q Hub ER110
      Sky TV: Sky+HD box
      Join Date
      Mar 2010
      Location
      Near Portsmouth
      Posts
      27,895
      Thanks
      810
      Thanked 2,194 Times in 2,064 Posts

      Re: Sky Hub synced with SNR of 3.0

      I can't provide a direct link but I can provide some other information on the topic.

      Essentially the Sky Hub SR101 and the Sagem 2504N both support "G.INP". This has now been rolled out to Sky's ISAM hardware. The intent is to do the same for the other Sky routers in due course.

      At the present time G.INP will not be available off Sky's kit.

      Looking around the Internet there are various articles on G.INP. I don't know which technical aspects Sky have incorporated but the articles are interesting to read. Below are just a few of these articles. Please feel free to google more:

      DSL Xpert Support G.INP

      Saving Copper

      MT2311 & MT3302 **Soon Available**-VDSL2 & ADSL2+- |

      DSL Expresse Software - ASSIA

      ITU-T Recommendation database

      One of the most interesting aspects which will please those who can benefit from this is the reduction of the effect which REIN can cause.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

    12. #9
      mattan's Avatar
      mattan is offline Sky User Member
      Exchange: SSSWN
      Broadband ISP: Sky Fibre Unlimited
      Router: Sky Hub SR101
      Sky TV: Sky+HD box
      Join Date
      Oct 2012
      Posts
      489
      Thanks
      21
      Thanked 30 Times in 28 Posts

      Re: Sky Hub synced with SNR of 3.0

      Just read the "Saving Copper" article and think we should ask for some of that NodeScale vectoring!

    13. #10
      nevets5891's Avatar
      nevets5891 is offline Sky User Member
      Exchange: ESNRB
      Broadband ISP: Sky Broadband Unlimited
      Router: Sky Hub SR101
      Sky TV: Sky+HD box
      Join Date
      Jul 2011
      Location
      North Berwick
      Posts
      82
      Thanks
      10
      Thanked 0 Times in 0 Posts

      Re: Sky Hub synced with SNR of 3.0

      I'm bidding on a few SR101-Z's on ebay. Do you think I'd have to get DLM re-enabled on my line to get this benefit? I recently got reprofiled to 15Mb\1Mb on the gamer profile, then it automatically jumped to 16Mb\1.2Mb about a week later.

     

     
    Page 1 of 5 123 ... 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