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    What causes devations in Noise Margin??

    This is a discussion on What causes devations in Noise Margin?? within the Sky Broadband help forums, part of the Sky Broadband help and support category; Dear All, The noise margin on my ADSL hovers around the 7.0Db but oftern drops to 5.1Db and so my ...

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      the_big_1's Avatar
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      What causes devations in Noise Margin??

      Dear All,

      The noise margin on my ADSL hovers around the 7.0Db but oftern drops to 5.1Db and so my ADSL drops off I think.
      I tried putting my Router direct to the test socket on the rear of the master but it had no effect, same readings. My router is plugged in to the master via a filtered faceplate.


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      Environmental factors - RF interference, crosstalk from other users and so on.

      You obviously haven't read the info you were pointed at earlier.

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      I did, it just seems that all was going ok, I rebooted the router at the higher Db and after 30 mins, off it went and I checked the db and it was back to 5.1, then up to 6.8 again. Is there anything I can do, or ask BT to do solve this or I will be rebooting my router every 20 mins forever.

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      OK I'll try again. Read this slowly

      Noise varies through the day.

      In the morning it may be low.

      As the day progresses the noise rises.

      Late in the evening the noise starts to drop back towards morning levels. It's a cycle.

      Let's assume that if you measured this over a day the noise margin was seen to vary by 5db.

      Now when you sync your router it starts at 6.9db. Depending on where you are in the rising/falling noise cycle the noise margin will now drop over the coming hours or rise. It could go up by 5db or down by 5db.

      What you are trying to do is sync your router at the time of highest noise (shown as lowest noise margin in your router) so that you have set the new lowest figure.

      Get it?

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      lol.. I dont think he will every forget lol!

     

     

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