I finally got out after a long while the other night and have three programs set up almost the same from 4 to 12 just to see the they way things tend to hit on the different frequencies. I notice when ever I switched back to 8 that ther was a period of time that I wouldn't hear anything, nothing on on the screen, no sound through the headphones, I'd switch back from 4 or 12 and it would be normal, then go back to 8 and then it to would be ok. But then do the same thing when switched again, it didn't seem to do it every time, going to be head out with my nephew this afternoon and will see what happens but was curious if this has happened to anyone else ?