We have the habit of watching a bit of tv when we go to bed at night, news or sports or HGTV, but lately all we're getting on that tv is images broken up into little blocks. This I've learned is called macroblocking. But whatever it is, it's truly annoying and there seems to be no real remedy for it. The signal coming in gets weak and the picture is scrambled. Last night every channel except the 4 local channels were unwatchable. Didn't matter whether the channel was a high def channel or just plain digital.
When I woke up this morning I turned on the tv to see if there was any change and yes, there was. All the channels were working fine. It's just in the evening this happens. Why we pay for that extra required box I don't know.