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    Video Recorder effecting my noise margin?!?!!

    This is a discussion on Video Recorder effecting my noise margin?!?!! within the Sky Broadband help forums, part of the Sky Broadband help and support category; This is soooo weird. I ended up capped at 3mb rather than the 4mb I had been getting for the ...

    1. #1
      BrigadierA's Avatar
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      Video Recorder affecting my noise margin?!?!!

      This is soooo weird.

      I ended up capped at 3mb rather than the 4mb I had been getting for the last few years. I called Sky the other day and they lifted my cap to 4mb and everything seemed okay for the evening. Next day, my noise margin was at 7.4db and my connection was really running slow again. I disconnected everything and even turned off all the electronical goods on the other side of the room (Sky box, LCD, PS3, Wii, DVD Player, Video Recorder, Security Camera, Stereo and DigiSender) which aren't connected to the broadband and are a good 3 to 4 metres away.

      Whilst connected to the test socket I then got:
      System Up Time 00:13:34
      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 21617 40371 0 2000 79449 00:12:09
      LAN 10M/100M 298 0 0 117 0 00:13:31
      WLAN 11M/54M 48455 31142 0 75029 4363 00:13:24

      ADSL Link Downstream Upstream
      Connection Speed 4092 kbps 510 kbps
      Line Attenuation 49.0 db 29.4 db
      Noise Margin 11.5 db 20.5 db

      Notice the noise margin of 11.5db - nice I thought.

      I turned everything back on and it suddenly dropped to:
      System Up Time 00:18:24
      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 26877 49508 0 1793 69715 00:17:00
      LAN 10M/100M 345 0 0 105 0 00:18:22
      WLAN 11M/54M 60906 40323 0 67890 4261 00:18:15

      ADSL Link Downstream Upstream
      Connection Speed 4092 kbps 510 kbps
      Line Attenuation 49.0 db 29.4 db
      Noise Margin 7.5 db 20.5 db

      Argh! My noise margin was back down where my connection gets slow.

      Switched everything off again and it shot back up to 11.7db...

      So I started the slow process of unplugging everything and then plugging each item back in to find out what was effecting it...

      It turns out it's my Video Recorder. Any ideas why?

      The good news is that I don't use i very often now, so it's been left off.
      ~~~~~~~~~~~~~~~~~~~~~~~~~~
      www.HorrorDVD.co.uk
      The Best and Worst Horror Films Reviewed


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    3. #2
      Smithy99's Avatar
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      Re: Video Recorder effecting my noise margin?!?!!

      Chances are it is a failing power supply, this can cause havoc with noise margins.

    4. #3
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      Re: Video Recorder effecting my noise margin?!?!!

      Get the Video recorder fixed and you can probably get a speed faster than 4mb as 11.5db is a high noise margin (Target is 7db). Is the VCR connected to a surge protector of some sort? if not fitting one might help alleviate the issues you are experiencing if you dont want to get it looked at.

    5. #4
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      Re: Video Recorder effecting my noise margin?!?!!

      Quote Originally Posted by simonmpoulton View Post
      Get the Video recorder fixed and you can probably get a speed faster than 4mb as 11.5db is a high noise margin (Target is 7db). Is the VCR connected to a surge protector of some sort? if not fitting one might help alleviate the issues you are experiencing if you dont want to get it looked at.
      Yes, everything was already connected to surge protectors including the video recorder. I was supposed to get 4.5mb when I signed up to Sky, but I only ever got 4mb. I had lot of problems with power cuts in my area in March (may have triggered the video recorder issue) and Sky capped me at 3mb. To think the problem was probably the Video Recorder all this time!

      The phone line was replaced by BT a couple of years ago so should be a decent line. Any rough ideas of what I should expect now that I've removed the electrical issue?
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      The Best and Worst Horror Films Reviewed

    6. #5
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      Re: Video Recorder effecting my noise margin?!?!!

      Generally 1db of noise over 7 equals to 500kbps extra speed available. So your looking at about 6mb.

    7. #6
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      Re: Video Recorder effecting my noise margin?!?!!

      Quote Originally Posted by simonmpoulton View Post
      Generally 1db of noise over 7 equals to 500kbps extra speed available. So your looking at about 6mb.
      Oh well, my noise margin has dropped over night to 7.5db, but at least seems to be giving me a very stable fast speed (which it wasn't before).

      May be due to the large amount of rain overnight. Can resetting your router give you different noise margins i.e. do you get a different connection each time?
      ~~~~~~~~~~~~~~~~~~~~~~~~~~
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      The Best and Worst Horror Films Reviewed

    8. #7
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      Re: Video Recorder effecting my noise margin?!?!!

      Whats a Video Recorder?






    9. #8
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      Re: Video Recorder effecting my noise margin?!?!!

      As your speed is capped it shouldnt change when you reboot. If it wasnt capped then the speed would increase/decrease as it syncs up at the target noise margin at different parts of the day.

    10. #9
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      Re: Video Recorder effecting my noise margin?!?!!

      Okay, it's been up and running for nearly 10 hours now since the last reset and the noise margin seems to just be continually dropping - It's gone from 7.5db to 3.6db just now. My connection is great though - getting the full download speed that it's suggesting. Previously, 7.5 db would have given me dial up speeds.

      System Up Time 09:41:06
      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 209921 326077 0 831 10367 09:39:41
      LAN 10M/100M 18041 0 0 131 0 09:41:03
      WLAN 11M/54M 354280 230798 0 10670 1056 09:40:56

      ADSL Link Downstream Upstream
      Connection Speed 4088 kbps 510 kbps
      Line Attenuation 49.0 db 29.4 db
      Noise Margin 3.6 db 20.5 db
      ~~~~~~~~~~~~~~~~~~~~~~~~~~
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      The Best and Worst Horror Films Reviewed

    11. #10
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      Re: Video Recorder effecting my noise margin?!?!!

      Quote Originally Posted by dsldude View Post
      Whats a Video Recorder?





      To be honest, I don't know why I had it plugged in!
      ~~~~~~~~~~~~~~~~~~~~~~~~~~
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      The Best and Worst Horror Films Reviewed

     

     
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