Sunshine just increased mt Data Rate...

After getting used to poor sync speeds guess what..

Lovely sunny day here in Durham and warm.Power went down
on the estate and I thought great, just when my modem was "learning"

Anyway just checked my sync speed again and its shot up from 1 Mb
to 1.85Mb.Download speed just the same - 1 Mb

Will the system adjust to the new level or do I have to ask Plusnet to
"put some more coal on"

In the Summer months, I always enjoy at least 3 Mb. Concluding, I suppose there must be a copper wire connection problem - Contraction,Expansion....

Regards

Peter

It's all to do with noise. MW radio signals affect ADSL, and these signals are always strongest during darkness hours. When we have fewer hours of darkness in the summer, there's less noise. Nothing to do with the copper itself.

Home ADSL: Be Unlimited LLU
Business ADSL:
Be LLU supplied by Andrews & Arnold
Orange 3G Business Everywhere Mobile BB

On the will the system adjust, yes, it takes up to five days for it to happen

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk

In reply to a post by zebedeee:

It's all to do with noise. MW radio signals affect ADSL, and these signals are always strongest during darkness hours. When we have fewer hours of darkness in the summer, there's less noise. Nothing to do with the copper itself.

So Mr.Appleton is to blame (F1 F2 Layers)....Not totally convinced I'm afraid

Peter

Couldnt a condensation problem be a factor - more likely at high humidity levels which occur more frequently in winter ?

In reply to a post by jackson4:

In reply to a post by zebedeee:

It's all to do with noise. MW radio signals affect ADSL, and these signals are always strongest during darkness hours. When we have fewer hours of darkness in the summer, there's less noise. Nothing to do with the copper itself.

So Mr.Appleton is to blame (F1 F2 Layers)....Not totally convinced I'm afraid

Peter

Must be global warming then

Home ADSL: Be Unlimited LLU
Business ADSL:
Be LLU supplied by Andrews & Arnold
Orange 3G Business Everywhere Mobile BB

In reply to a post by jackson4:

So Mr.Appleton is to blame (F1 F2 Layers)....Not totally convinced I'm afraid

Convinced or not it is a fact that AM/MW radio signal strengths increase during the hours of darkness (although it is the D layer which causes this - http://en.wikipedia.org/wiki/D_layer ).

A second fact to consider is that the frequencies employed for AM/MW radio are essentially the same as those used for ADSL.

A third fact is that a long wire works very well as an antenna for AM/MW radio.

Finally the ring wire in telephone extension wiring is connected to one side of the ADSL pair in the master socket through a capacitor big enough to look like a direct connection.

Now whether or not those facts are enough to convice you that AM/MW radio is a major factor in increased noise levels for ADSL during the hours of darkness I'm not sure but they convinced me.

---

If you can't fix it with a hammer you've got an electrical problem.

Edited by kwikbreaks (Tue 09-Mar-10 10:35:14)

In reply to a post by kwikbreaks:

In reply to a post by jackson4:

So Mr.Appleton is to blame (F1 F2 Layers)....Not totally convinced I'm afraid

Convinced or not it is a fact that AM/MW radio signal strengths increase during the hours of darkness (although it is the D layer which causes this - http://en.wikipedia.org/wiki/D_layer ).

A second fact to consider is that the frequencies employed for AM/MW radio are essentially the same as those used for ADSL.

A third fact is that a long wire works very well as an antenna for AM/MW radio.

Finally the ring wire in telephone extension wiring is connected to one side of the ADSL pair in the master socket through a capacitor big enough to look like a direct connection.

Now whether or not those facts are enough to convice you that AM/MW radio is a major factor in increased noise levels for ADSL during the hours of darkness I'm not sure but they convinced me.

Sorry, still not convinced but respect your theory...

Cant help thinking - talking micro volts of RF here (no amplification taking place as in a
commercial/domestic receiver) Its a good guess the copper wire from my area to exchange is mainly underground ruling out the antenna theory ..I don't have a Bell wire..
The noise margin shown in router stat's remains pretty much constant (15)
Regards
Peter.

Do you run your router on a plugin extension?

The noise margin will remain pretty constant (within reason) - it is the sync that varies. As noise increases the connection cannot maintain a high sync so the router/dslam renegotiate a new sync which maintains the target noise margin. If yours is 15dB it suggests that your line is unstable as that is the highest the BT DLM will set it to (it starts out at 6dB)

It may be that your line is picking up noise from some other source of course but for the vast majority it is AM radio.

---

If you can't fix it with a hammer you've got an electrical problem.

Edited by kwikbreaks (Tue 09-Mar-10 14:02:03)

In reply to a post by kwikbreaks:

Do you run your router on a plugin extension?

The noise margin will remain pretty constant (within reason) - it is the sync that varies. As noise increases the connection cannot maintain a high sync so the router/dslam renegotiate a new sync which maintains the target noise margin. If yours is 15dB it suggests that your line is unstable as that is the highest the BT DLM will set it to (it starts out at 6dB)

It may be that your line is picking up noise from some other source of course but for the vast majority it is AM radio.

Hello again, Yes noise margin can appear constant - noise isnt my problem (never been mentioned) I have reported "drop outs" which brings me to my originl theory - faulty cable connections.Interference that would show up on noise stats would be generated by some examples:-

Fluorescent lamps with dodgy or worn out starter gear
Street lighting especially mercury, sodium variety.
Worn contacts on home thermostats (heating etc)
Microwave ovens with leaky doors - yes they exist...
Corroded earthing points - even on copper plumbing.
Ham/CB radio transmitters - worst offenders in my mind.
Line output radiation from old TV --Valve type.

These are all real "high levels of radiation" intereferance and
should be confused with MW Radio signals..

Regards

Peter