Amplified Antenna Makes Loud Repeating Noise

When I hook up an amplified antenna to my tv, every tv channel gets the proper audio, but on top of that is a super loud and quickly repeating sound through the stereo. When I switch to another input on the DAC, it stops. The tv audio is fine. Anyone had this experience or know how to correct it? My system is: Nait 2 Integrated, Linn Mimik cd player, Caiman DAC, Mac Mini, and B&W speakers and sub, Samsung plasma tv, if that helps
Do you have a complete home security setup?
I would think it is some digital signal radiated around your home.
Perhaps from your BluTooth or WiFi setup.
(Or a neighbors.. Which is illegal per FCC, no digital device can interfer with over the air signals)