I run all channels and and updates from my iPhone. I als set the iPhone to not go to sleep when I run a channel scan.
I am pretty much on wifi at my house when running a scan. I find the iPhone performs this task much better than say my iPad under the same circumstances.
I also make sure this done when noone is watching tv/using the Tablo when doing this.
It goes pretty quick and seems to resolve channel reception issues for me.
ABC is a bear in the philly market. Either get great scan and it's perfect for a few days. Or it will crap out for no reason at all. So I do a channel scan once a week for abc reception.
I may just a vhf antenna and combine it with cv2 and see if that helps for me. But that is a project and research I just can't do right now. If anyone has any recommendations let me know.
Btw, my antenna is in my attic and may be going up on the roof when the solar panels go in.that may help with abc. I know those solar panels are kill the antenna signals.....I dread going up on my roof. Very high and pitched. Not my comfort zone!
Let the channel scan run and complete. Make the number of channels in the 5-10 channels range and see what happens. Just give it time to do its thing.it might help....