A ground loop isolator will solve the problem as well. I'm a home hi-fi nut, and run into this problem regularly due to ground potential differences in the equipment. 99.9% of the time, the ground loop hum is caused by cable tv connections. Since I have moved to DirecTV HD, I simply run Toslink (fiber optic) out of the receiver to my system for audio, breaking any ground loop problems at the source; as Toslink has no "electrical" connection.
Keep in mind that ground loop isolators for satellite will need to be rated in the gigahertz range to work, so a typical cable isolator won't work.
- 2012 Dodge RAM 2500 ST 6.7ltr Cummins
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