this only happens when i got the uhf antenna hooked to my 508 sometimes at night 2-4 am the channels change by thierselves and its like someone else is controlling it.....i do have a friend who has a 510 that lives 2 houses down could it be that my friends remote or something else uhf is interfering with my reciever and causing it to do this? is this a software glitch? it only happens when the uhf anntenna is connected when i just use it as an ir remote its fine