Target SNR Margin
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Help with my Plusnet services
- :
- Broadband
- :
- Re: Target SNR Margin
Target SNR Margin
07-09-2011 7:55 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
The margin has remained around this level for the past 4 hours at a below normal sync rate of 3104Kbps.
Edit: The router did resync from 3488 down to 3104 after about 1 hour, with the same SN Margin.
Re: Target SNR Margin
07-09-2011 8:00 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: MrT If on restarting my router shows a SN Margin of 9.0dB, does that mean my target margin has been set to 9.0dB?
Most likely, yes.
At any given moment in the universe many things happen. Coincidence is a matter of how close these events are in space, time and relationship.
Opinions expressed in forum posts are those of the poster, others may have different views.
Re: Target SNR Margin
07-09-2011 8:05 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: walker23 Most likely, yes.
Given I'd had a stable connection for about 7 days prior to unknown events causing a loss of sync, that seems a little severe!!
Re: Target SNR Margin
07-09-2011 8:29 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Target SNR Margin
07-09-2011 8:55 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: spraxyt Were there a lot of CRC errors before sync was lost?
I don't know the answer to that one but I usually have a low CRC and HEC total. The FEC total is sometimes high but I guess that's not a problem.
Stats after 5 hours are attached
Re: Target SNR Margin
07-09-2011 10:52 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Target SNR Margin
08-09-2011 11:16 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: spraxyt I think the DLM gets concerned if it's much above 3000 per day.
Unknown events caused another resync at 1am this morning at a slightly lower speed of 2976Kbps with a SNM of 9dB. The stats in the 9 hours since then show only a 'few' CRCs. The 22 Error Seconds might be a cause for concern though?
I'm monitoring with RouterStats today - so far the margin is 10.5dB with a few jumps up to 11dB.
Re: Target SNR Margin
08-09-2011 3:44 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
With regard to the error seconds I suspect the previous value (10ish) wasn't reset when the router re-synced. I doubt the value matters at that level.
Re: Target SNR Margin
08-09-2011 5:09 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
After 6 hours with SNM steady at 10.5dB, I've just had another resync (at a slightly higher sync rate, as expected for the time of day). The SNM is now wobbling between 9dB and 11dB. I cannot think of any reason as to why.
Re: Target SNR Margin
09-09-2011 10:54 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
The noise plot is more lively after re-sync though that might simply reflect small variations about 9¾ and 10¾dB with the router reporting the nearest ½dB. The upward step at 18:22 looks like a source of electronic noise disappearing. In my experience noise margin plots tend to be more lively in the evening.
Unfortunately seeing what happens is easy, as is speculating about the source, but actually finding the source not so.
Re: Target SNR Margin
09-09-2011 11:03 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Target SNR Margin
09-09-2011 11:54 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Such events seem to be more often than they were. I just wonder whether our miserable dry summer has a part to play. That said, my line attenuation has remained at 56dB so there doesn't seem to be any dodgy cable joints anywhere.
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page