We have 3 receivers, an sd and 2 H20's. We frequently lose hd signals sometimes in even a mild rain. I suspect a dish (5 lnb) alignment problem. Before I run up a service call fee, what signal strengths should I be seeing on a clear day, off the different sattelites? My fault for not having the protection plan, but who knew, and I could see myself kicking myself if I had it and needed no service calls. Thanks.