I've been trying with no success to find signal off Hispasat at 30W. I have a 90cm powered by a SG9120. The arc seems to be tracked well, as I get strong signal from 125W to 61.5W (even though nothing to watch on this one). USALS on my CS8000 HD tells me 30W is out of range? I never set any limits on the motor. Any ideas on how to fix this?