HTL-HD receiver question

[prince_001]

DirecTV got installed yesterday using Hughes HTL-HD receiver. Connected using DVI to my Panasonic LCD. I have a off-air antenna installed, and getting very good quality local HD reception. But got a little problem (or I should say annoyance). Whenever I try to change the local channels, it take almost 10 seconds before it goes to the next one, and all that time it shows "Digital In" on the TV. No picture for almost 10 seconds, but has sound. Any idea on what's going on? Thank you all