I installed an outdoor antenna and properly grounded it, but am getting an audio hum or buzz as a result. What should I do?

• Connect a ground loop isolator to the coaxial antenna cable close to where it connects to the AV controller. You can purchase this module from electronics retailers. The module filters out interference caused by the outdoor ground connection. Or you can use a coaxial surge protector.
  
  Warning: Never disconnect the antenna's ground connection or disable the grounding pins on your power cords. These exist for the projection of both you and your equipment.