REIN ?

[#1]

Hi,
Over the past few weeks I've noticed that the noise margin temporarily rises between 1 and 2dB.
This takes my max speed from about 76 to 80mbps.
The time period can be between 10 mins and an hour, so it appears that a 'noisy thing' is going quite for a while.
Any ideas on how to track this one down?
ATB
SN

[#2]

Can you look at the individual bands in more detail? If you can get some idea of the frequency bands affected you might be able to use a radio receiver.
Does it occur at the same time of day or within certain time slots? Try keeping a log.

[#3]

Maybe the noise margin temporarily rising is someone nearby switching off their VDSL2 modem for a little while, temporarily reducing the crosstalk.

[#4]

That thought crossed my mind, but it's a whole dB, so I'd have thought they'd need to have badly balanced line for that much cross-talk, so I'd consider that after checking other factors, and see if there is any pattern. I do note that the "off" time is nearly an hour - the suggested time for turning off a Fibre modem to hopefully avoid DLM issues when a resync is wanted - could be coincidence!

[#5]

Thanks all,
I'll keep  an eye on it and recod as much as I can.
It might take a considerable time to gather sufficient data to even attempt of get a conclusion.
ATB
SN

[#6]

As would be expected