I have my 622 in single mode. From what I understand I can also have that display on another TV, but unlike dual mode it will only display what is being watched on the one tuner on both TV's as opposed to being able to watch both TV's independently, which is just fine. We only watch one TV and not both at the same time. So my question is, in the this setup would it be able to output in HD on the 2nd TV if the receiver is in single mode? I know that it won't in dual mode.