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SN Margin

  • 07-04-2008 10:49pm
    #1
    disley
    Registered Users, Registered Users 2 Posts: 33 ✭


    Eircom 2MB.
    I am told my SN Margin should be at least 12.00. It goes from 1.00 to 16.00

    I can not see any difference. Now it is 1.00/18.00. Attenuation is 28.50/10.50.Is it important or not?


Comments

  • #2
    nilhg
    Registered Users, Registered Users 2 Posts: 5,207 ✭✭✭nilhg


    I'm starting to think that the netopia modem has some sort of a bug when it comes to reporting SN Margin, I just got this speed test with it varying between 1.5 and 3.0 (its usually between 9 and 11).

    256517879.png

    No CRC errors either.


  • #3
    kaizersoze
    Registered Users, Registered Users 2 Posts: 7,042 ✭✭✭kaizersoze


    In answer to your question, yes, a good SN Margin is important.

    I agree with nilhg about the Netopia not reporting SN Margin or crc errors correctly.
    Mine never went above 9db when I had the Netopia even though I'm only 1.5k from the exchange on a spanking new line and never had speed or connection problems.
    It was also reporting 9 - 10k crc errors daily.
    Then about a year ago I dumped the Netopia for a D-Link modem. Straight away my SN Margin jumped to 26.5db and hasn't changed much since. CRC errors also dissappeared.


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