The RM-9946 uses multiple satellites to determine which satellite it has found. The RM-9946 will fine tune on the first satellite that it finds for a minute or two. This is generally long enough to give you a picture. However, to verify that it is locked on the correct satellite it needs to move off and find two more satellites. If the antenna eventually ends up back on the correct satellite then it is operating correctly. However, if the RM-9946 stops for ten minutes and then moves, you may have something more serious going on.