thanks for the reply
This device does not have the signal strength/quality meter. It seems to come up when I watch live TV. I watch the Monday Night Game and when I caught up with live TV it started going quite for about 15 minutes. I changed the buffer to go to disk instead of memory and increased it from 1300ish to 3500, but it is still happening.
Tonight I am planning to put the sound straight to speakers and see if the sound stops.
Does there seem link any thing else I should try?