In a later SNR-history graph captured right now, Sat 17:59, it shows nicely the droop in downstream SNRM from its daylight high of say 3.1 dB - its downstream target is 3dB, so that is as it should be - down slowly to a current 2.5 dB, the downward slope starting at sunset. Based on history it will only get slightly lower still eventually. The previous day’s minimum was at around 21:30, followed by a sligh rise and then a lesser, broad dip whose minimum was at around 04:10. So I am assuming that temperature is controlling the d/s SNR. The upstream doesn’t show any such thing much as the jumps up and down are so overwhelming. And the odd thing is that the high upstream rung value is still way too low, at 4.1 dB roughly, instead of the 6 dB u/s target.