Can plusnet lock your SNR?
- 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: Can plusnet lock your SNR?
Can plusnet lock your SNR?
12-02-2011 11:17 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I know that raising the SNR will reduce my speed, but due to the instability my IP profile has been at 135K for the 3 months since joining plusnet, so the added stability might get my speed up...if it's possible to lock the SNR.?
Re: Can plusnet lock your SNR?
12-02-2011 11:27 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
The default on most is 6dB but it can be higher, e.g. 9 or 12dB.
DLM can also change it, not sure how that would interact though.
Obviouslt the actual SNR changes during a "session" as conditions change.
Re: Can plusnet lock your SNR?
12-02-2011 11:31 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Can plusnet lock your SNR?
12-02-2011 11:57 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
i.e. a 6dB higher SNR will half your sync speed
Re: Can plusnet lock your SNR?
12-02-2011 12:25 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: knowdice i.e. a 6dB higher SNR will half your sync speed
Why do you know it will half the speed? You are not getting confused with power when -3dB drop the power by half.
Re: Can plusnet lock your SNR?
12-02-2011 12:28 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
6dB for voltage ratio.
Re: Can plusnet lock your SNR?
12-02-2011 12:29 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Can plusnet lock your SNR?
12-02-2011 12:32 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Can plusnet lock your SNR?
12-02-2011 12:36 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: http Each line needs a specific amount of SNR to run at a given speed. Very roughly its often said that 1dB of SNR equates to 450kbps of speed, but other factors such as attenuation and output power need be bourne in mind and some lines may only see around 1Mb per 3dB.
To argue with someone who has renounced the use of reason is like administering medicine to the dead - Thomas Paine
Re: Can plusnet lock your SNR?
12-02-2011 12:37 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Can plusnet lock your SNR?
12-02-2011 12:43 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
If for example you are on a long line and with a target SNR of 6dB and you get say 2mbs download sync, if you change the target SNR to 12dB then the sync speed will drop to 1mbs.
dick:quote
Re: Can plusnet lock your SNR?
12-02-2011 1:21 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: knowdice If for example you are on a long line and with a target SNR of 6dB and you get say 2mbs download sync, if you change the target SNR to 12dB then the sync speed will drop to 1mbs.
That's not inconsistent with the Kitz observation.
On shorter lines at higher speeds you will definitely NOT get a halving of connection speed by such a change.
Best thing is to try it and see what the effects are.
Re: Can plusnet lock your SNR?
12-02-2011 9:30 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Can plusnet lock your SNR?
13-02-2011 6:06 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Can plusnet lock your SNR?
14-02-2011 10:29 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Starts off as expected, but then it seems on the next resync to need a bit more reduction and then a bit more just to keep the same margin.
I could start off at 80% to get to the target SNR margin I wanted, but then a few resyncs later I'm on 40% to get the same effect. Almost as if the BT DLM mechanism is fighting me.
-- gyre --
- 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: Can plusnet lock your SNR?