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[NewtronStar]

I can already see the big SNRm dive just after 20:30 the effects of atmospheric RFI on longer lines  where the SNRm starts to rise in the early morning and then reaches it's maxium at 12pm and stays steady during the day until 20:00

And the cycle continues but times start to shift as you move from summer to winter and back to summer it's as regular as clockwork.

[burakkucat]

Perhaps a forced resynchronisation event, at around 0800 hours, will result in a DS SNRM plot with a minimum of 4 dB and a maximum of 6 dB? (At present, the minimum is about 7.2 dB and the maximum is about 9 dB.) 

[MaximusPrime]

@burakkucat, @NewtronStar,

There are 0.8km of street lights at my cabinet causing noise too, they are timed & light dependent.

The reason for the high SNR was because 1 of the lights directly above the underground cable was broken IMO.

The electricity for the broken light is probably fed down the earth cable into the ground where the cable is caused REIN.

I reported the broken light & it was fixed 2 days later. Hopefully my SNR will drop & my speeds increase

[burakkucat]

I see that your circuit underwent a resynchronisation event at 0510 hours this morning which resulted in a reduction of both the DS and US SNRM.

Then, for some other reason, there was a stepwise reduction in the DS SNRM at about 0950 hours which persisted until about 1150 hours. At the latter time the DS SNRM recovered, almost to the same value that existed prior to about 0950 hours.

[MaximusPrime]

@burakkucat,

the reason for that trench in my SNR graph was the Oven being on. I get the same when I use my treadmill,

any idea why this happens? Just EMI?

[burakkucat]

I am very surprised that your oven has such an effect. What type of oven is it?

I wonder, is your electricity an overhead feed and are you in a rural location?

I am aware of two instances where a treadmill has caused significant REIN interference to xDSL circuits and in both cases the cause was identified by the spurious RF noise generated.

[MaximusPrime]

@burakkucat,

it's an older oven, the fan assisted part was used.

My electricity is overhead to a pole then underground into the garage mains & into our attic from there.

1.png - shows the drop cable into the house & the final electrical pole behind
2.png - shows the final telephone pole & the electrical transformer our electricity is attached too behind

[burakkucat]

Hmm . . . I'm not sure what to advise.

Do you see a dimming of any of your lights when the oven (or other heavy electrical load) is turned on?

[MaximusPrime]

@burakkucat,

I haven't noticed any dimming but the oven is only on during the day so the lights wouldn't be on.

There is also a small housing estate behind that transformer which has about 5 street lights too.

We live in a rural area, the setup for EMI for us is pretty bad.

[WWWombat]

Does your oven have a non-fan mode?

That might allow us to confirm whether the problem is caused by the high load from the heating elements, or EMI from the motor driving the fan.

[MaximusPrime]

@WWWombat,

yeah it has a non fan compartment. I'll check next time it's on.

If it's due to high load the problem is at the transformer?

Would make sense because it happens when the treadmill is on too & the treadmill is way out in the garage away from the telephone socket

[burakkucat]

. . . the treadmill is way out in the garage away from the telephone socket

It might be that the treadmill is generating copious RF interference which is then travelling through the mains wiring, entering the modem/router via that pathway.

[MaximusPrime]

@burakkucat,

any way to prevent that?

[NewtronStar]

Using a mains conditioner with RFI filter is the only thing I know to prevent this

[MaximusPrime]

@NewtronStar,

cheers for the info, would a Uninterrupted Power Supply (UPS) work too?