musifalsk wrote: It must be some kind of grounding failure of some kind.
The strange thing is, SX3 doesn't give you any trouble. And if it is a grounding problem, it should also appear in SX3.
Anyway the best solution for grounding problems is to take care of proper grounding ;)
as an alternative you could check this video
But before you take any drastic measures, I would certainly check out if you don't have any other equipment around the Alphatrack that can interfere, like an external harddrive for instance.
Or maybe a cellphone. If my cellphone searches for signal and it is to close to the Alphatrack, it goes bezerk.
You can also do a search on the grounding issue on this forum because there are a few topic, with possible solution on that.
Good luck.