I had trouble with the signal on one of my OTA channels. Not sure if I have the same amplifier but I put it on before I split the signal to my 622 and TV tuner, and I got that channel relatively stable when I watch it on my TV tuner. Much better than before the amplifier was installed. It still goes in and out with the yellow screen through my 622 though. Rest of my channels are fine on the 622 and it's nice having PIP and lots of choices. Sad I can't DVR NBC in HD though, but I'm hoping for Locals this year to solve this problem.