I installed a 922 today and the customer had me take out a 612. He had 2 tvs hooked up to his his tv out channel 3 and had a HDMI hooked to the only HD tv. I opened up tv 2 modulater so channel 60 worked but could not get a tv 2 remote to work. I have only installed 5 since march so I dont have enough experience finding this fun stuff about the 922. I only need this info for personal use since I am off work but would like to know