@zippy ...speaking of signal/station strength ...i have seen some expensive digital tuner boxes that show on every chanell...but in our case, we can only rely on the Tablo tuners, so i go by the 5 green dot strength meter on the chanell scan in the ipad Tablo app
I do all my updating thru the ipad app, not the appletv of course because it lacks that iOS functionality
After doing a new channel scan after repositioning and adding height to my rooftop antenna, I just added the 1080,720,480 all 5 green dots on ipad stations for their respective ratios. Stations that were yellow or red I did not add by the way they were stations I did not want anyway.
All we care about is local abc,nbc,cbs,fox,...but i sure like the grit,cozitv,justice,heroicon,cw, 3 ion stations,decades,pbs,escape,mvies,revn,metv...all these are 5 green dot either ....1 of those 3 ratios and my samsung 4 k tv has and incredible up scaler that makes even 480 look good.