garbled audio

I have a TRX2, WS1098 & a WS1095 and they all 3 have been garbling off & on for about 3 weeks now on SAFE-T in NWI. The TRX2 is on an antenna by itself, the other 2 share an antenna. When they garble, the text on the screen flashes wildly and it sounds like continuous mic keying & unkeying...