The 622 is different than the 921. You can still us the composite outputs (RCA), question would be which set due to which mode you would be using. If in single mode, won't really matter, but if you are going to start using dual mode, it would have to be tv2 outputs. Setup would have to include makeing sure the channel you want is tuned on the correct tuner. You will probably have to play with it to get used to it. Also be wary of the 'inactivity standby' located under the 'preferences' menu.