I have a Sennheiser G3 mounted and attached to a Sony A7s on a Movi. The hop is mounted to one of the movi arms. Levels sound good when movi is off but as soon as the movi is powered up there is a major hum/buzz and digital noise. I'm hearing that the A7s just has bad sheilding but any suggestions for keeping the feed clean? i've also noticed when you hover your hand over the G3 face, you will hear interference. What's that about?