What frequencies/bands are your radio systems using? If you are getting "interference" at the receivers with the transmitter off, then you need to identify the source of that RF signal. While its possible it low-level radiation from your other gear, its quite unlikely since all modern equipment has to meet radiation emission standards that would (should) mean it will not cause interference to radio mic receivers in close proximity.
I will investigate the frequencies this week. We have NADY 4
channel wireless mic/receiver sets. 3 of the 4 channels will register signals with no mic packs on. Once I moved the receiver
unit to the
stage apron I only had signal from the mic pack and I was able to turn it on/off with out the loud
white noise from the speakers. I am trying to locate any manuals, but being in a High School I'm luckt to have the cables I need let alone any manuals.
Is there a
meter or device to pickup RF signal and locate it's source?
Thanks for your input.