Sorry if this is a stupid question. I've noticed the audio dropping out on most of my HD channels. I'm in the SF area and those channels seem to be on 129. I have a D1000 and the signal strength on 110/119 are in the 90s-100s while 129 tends to fall between 64 and 80. Would this be causing the audio problem? My installer said my signals were perfect so I trusted him. Or is this a bug in the 622?