I'm being told by the installation technician that a Hopper will only operate at 118 to 122 volts. He says that anything out of this range will effect the signal or fry the Hopper. The tech says that all techs at Satellites Unlimited are taught this. Personally I think this bull but if these guys are instructed like this what can I do? Dish tech support says they have never heard of this and cannot or will not supply me with voltage requirements for the Hopper. Can anyone here supply info concerning this issue.