If VOX is being used and the ROGER BEEP is set to ON, a cycling beeping noise can happen, because VOX is triggered by sound. When ROGER BEEP is ON, VOX will be triggered by the ROGER BEEP tone that comes out of the speaker.  This will keep triggering the TX (Transmit) function and can send the radio into a ‘ROGER BEEP’ cycle.  To eliminate this cycle, set ROGER BEEP to OFF and increase the sensitivity level of VOX in MENU Options.