I have a 622 set up in single mode. It is connected to the dish via two coax cables. It is also connected to an ota antenna. If I have timers set to record on all three tuners, can I still use PIP? I ask because the other night I tried to pip the picture to see how much overrun Obama's press conference had. When I hit the pip button on the remote, the pip was black. When I tried to switch back the screen was locked. I tried to switch several times, but the screen stayed locked and a message popped up that said I had lost the satellite signal and that the receiver was reaquiring the signal. It was locked on step 0, however. I had to do a soft reset with the powerer button on the receiver. That worked, but I lost the first 30 minutes of my timers. Any ideas as to what might have been wrong? Thanks for any info.