My Ultimo has the dual tuner block for satellite, and it is working just fine, until the rain starts. In heavy rain, the picture gets pixelated and sometimes drops out. Not necessarily the whole picture, but maybe the lower 25% of it, or scattered around the whole screen, or maybe a stripe in the middle or in the top of the picture, and only for a second, befor it goes back to normal for a few seconds. The signal ratio is unaffected and still strong, but the picture is unstable. If I test under this conditions with the original box or with my Duo, the picture is just fine. Any ideas on what might be wrong..?