Never had this happen before but while my wife and I were running a wedding ceremony yesterday, we ended up getting interference through our lav mics. At sound check...no problems. After putting 2 and 2 together after the ceremony, we found that the problem was the photographers walkie talkie radios. As they came up front by us to take pics of the B&G, the mics picked up interference. As they moved to the back, it went away. Apparently our UHF signals crossed. Just an FYI if this ever happens to you.
