Re: SNR & Attenuation...

"Ed Essery" <(E-Mail Removed)> wrote:

> I apoligise if this is an FAQ - I did try searching for an answer but
> without success.
>
> I am a new ADSL/Broadband user. I am on Demon at 500K using a Draytek
Vigor
> 2600 router. The router is reporting an SNR Margin (Signal to Noise) of
> 30.0 and Loop Attenuation of 42.5. My question is whether this is good
bad
> or indifferent? What are the figures for an excellent circuit and for a
> marginal circuit.
>
> My ADSL Statistics are showing approximately a small number of uncorrected
> blocks - approximately 0.002% - should I be concerned about these.
>
> Thanks,
>
> Ed
>

Hi,
to give you a comparison, my margin is 19 downstream and 30 upstream.
My attenuation is 56 downstream and 31 upstream. I also get a small number
of errors, and have never had a problem with the connection (other than when
a major failure occurs within the BT network). A few errors is quite normal,
and nothing to worry about.

--

Martin


Martin Cooper

"Martin Cooper" <(E-Mail Removed)> wrote in message
news:gemini.3f1ab6d8008dafaa%(E-Mail Removed). ..
> "Ed Essery" <(E-Mail Removed)> wrote:
>
> > I apoligise if this is an FAQ - I did try searching for an answer but
> > without success.
> >
> > I am a new ADSL/Broadband user. I am on Demon at 500K using a Draytek
> Vigor
> > 2600 router. The router is reporting an SNR Margin (Signal to Noise) of
> > 30.0 and Loop Attenuation of 42.5. My question is whether this is good
> bad
> > or indifferent? What are the figures for an excellent circuit and for a
> > marginal circuit.
> >
> > My ADSL Statistics are showing approximately a small number of
uncorrected
> > blocks - approximately 0.002% - should I be concerned about these.
> >
> > Thanks,
> >
> > Ed
> >
>
> Hi,
> to give you a comparison, my margin is 19 downstream and 30 upstream.
> My attenuation is 56 downstream and 31 upstream. I also get a small
number
> of errors, and have never had a problem with the connection (other than
when
> a major failure occurs within the BT network). A few errors is quite
normal,
> and nothing to worry about.

Draytek Vigor 2600 on a Plusnet 512/50:1

SNR 38db
Loop Attn 21db

I consider this to be an excellent quality connection and I still get a few
uncorrected blocks occasionally.. As the previous poster has said, nothing
to worry about.

John



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"Stuart" <(E-Mail Removed)> wrote in message
news:bfg70k$e7gnb$(E-Mail Removed)...
>
> "John Olechnowicz" <(E-Mail Removed)> wrote in message
> news:1MASa.48962$(E-Mail Removed)...
> >
> >
> > SNR 38db
> > Loop Attn 21db
> >
> > I consider this to be an excellent quality connection and I still get a
> few
> > uncorrected blocks occasionally.. As the previous poster has said,
nothing
> > to worry about.
>
> SNR 18.5
> Att 18/19
>
> Come to Sunny Sydenham - SNR capital of the South East?

Hey Stuart..

Am I confused then??

I thought that the higher the SNR the better and the lower the Loop Att the
better..

Do I need councelling or what?

John


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John Olechnowicz wrote:

> Hey Stuart..
>
> Am I confused then??
>
> I thought that the higher the SNR the better and the lower the Loop Att the
> better..
>
> Do I need councelling or what?
>

No you are right - the higher the SNR the better, and the lower the
attenuation the better.

I am getting SNR of 40, attenuation of 32. This is on PlusNet 512K 50:1
with a Solwise SAR715PV.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

"John Rumm" <(E-Mail Removed)> wrote in message
news:NNXSa.50865$(E-Mail Removed)...
> John Olechnowicz wrote:
>
> > Hey Stuart..
> >
> > Am I confused then??
> >
> > I thought that the higher the SNR the better and the lower the Loop Att
the
> > better..
> >
> > Do I need councelling or what?
> >
>
> No you are right - the higher the SNR the better, and the lower the
> attenuation the better.
>
> I am getting SNR of 40, attenuation of 32. This is on PlusNet 512K 50:1
> with a Solwise SAR715PV.
>
>
> --
> Cheers,
>
> John.

Thanks matey!!

Thought I'd lost the plot for a sec :-)

John


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In message <llXSa.49232$(E-Mail Removed)>, John Olechnowicz
<(E-Mail Removed)> writes
>
>
>"Stuart" <(E-Mail Removed)> wrote in message
>news:bfg70k$e7gnb$(E-Mail Removed)...
>>
>> "John Olechnowicz" <(E-Mail Removed)> wrote in message
>> news:1MASa.48962$(E-Mail Removed)...
>> >
>> >
>> > SNR 38db
>> > Loop Attn 21db
>> >
>> > I consider this to be an excellent quality connection and I still get a
>> few
>> > uncorrected blocks occasionally.. As the previous poster has said,
>nothing
>> > to worry about.
>>
>> SNR 18.5
>> Att 18/19
>>
>> Come to Sunny Sydenham - SNR capital of the South East?
>
>Hey Stuart..
>
>Am I confused then??
>
>I thought that the higher the SNR the better and the lower the Loop Att the
>better..
>
>Do I need councelling or what?

Your comms theory's fine but spelling lessons may be required.
Here in N.Hants it's a lovely "SNR Margin: 45.0 dB, Loop attn.: 15.5 dB"
--
bof at bof dot me dot uk

> >Do I need councelling or what?
>
> Your comms theory's fine but spelling lessons may be required.
> Here in N.Hants it's a lovely "SNR Margin: 45.0 dB, Loop attn.: 15.5 dB"
> --
> bof at bof dot me dot uk

Well, excuse me!!!

I'll be watching for any typo's that you make and will ensure they are
pointed out to you appropriately!




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