I'm loving this combination in my RV. It's amazing how fast it finds 110/119/129 (and how slow the program guide download is - come on Dish, a little more bandwidth please). It's mounted on roof of RV, so I can hear it when it operates. When it's not being used, about once per hour I hear gears working, two with short duration movements followed by a slightly longer one. Could it be it recalibrates satellite aim or can someone tell me what is going on. Thanks!