Need help understanding SNR

Levels: Downstream Upstream
SNR: 25 dB 22 dB

According to this thread, that must be awful. How exactly do I go about changing that? From what I read, 6dB is 100% (60), so I did this equation to get the number for mine(ignore the periods)

6 ......... 25
100 X y

And the that would mean I would enter adsl configure --snr 450 Right?


But when I do that I go from 3mbps to 1mbps
And it raises my dB to 31

 

Try " adsl configure --snr 65550" this should lower your SNR by 6dB (so in theory to 19dB).
If this is still stable you can go lower.

The relevant part of the thread you quoted (and I wrote):

 

So doing 65550 put it to that, should I re-enter that till I get to 6?

 

No, if anything - reboot the modem and then try adsl configure --snr 65500 to get 9db decrease (from initial 25db) and if that is still stable reboot again and try adsl configure --snr 65450 to get 12db below the initial 25db.

Using one command over the other or one after another might you'll lose track of what you're doing and it's not just about successfully lowering your SNR bur also about achieving a stable one so do it in the simplest way possible so you can repeat and refine later on.

It might turn out that you will successfully get to a syn speed that will work sometimes and you'll have to backtrack somewhat to get to a slightly slower but stable speed. So while experimenting keep it simple and make notes - you'll lose those settings the moment you reboot your modem so be sure you know what was the final result and how you got there.

EDIT: Assuming your noise is at a constant level you might be able to get some 6mbps out of this connection (this is an estimate so don't sue me)

 

Got it. Thanks, also I have one more question thats somewhat off topic. Sometimes my download rates 7mbps, somtimes its 5mbps, and somtimes its 3mbps. Any idea how to control that kind of... It changes when I have it switched from fastpath to interleaved

 

If I remember correctly fast path should get you higher sync speed (and lower latency) but it's not as stable as interleaved. So in theory you should get higher speed with fast-path.