My SNR margin seems to drop dramatically when its warm. Today, hottest day here so far this year, SNR margin dropped from 7.5dB at 07:00hrs to 2.5dB at 15:00hrs. Router (Speedtouch) stayed in sync but notched up 1.5million FECs.
BTW this is 7km of overhead wire all the way to the exchange and seems to be a pattern in this warm(er) weather.
Is this typical or does it indicate a poor connection somewhere?