Hi, Back again just got myself a 4000t, could not get use to the other make of PVR I had. Anyway had an issue with the low signal message every few minutes. I checked the signal strength via the menu and it was 100/100. So I did an online search and someone said signal strength should be between 70 and 85%. So I turned down my signal booster and got my signal to 78/86% and quality to 80/100% and the issue seems to have gone.
Andy