Bi4KKF I had also tried adding a magnetic loop ground, and I even set the radio's output power to 0.1W, but it still didn't work. When I replaced the output antenna with a dummy load, it was still no use. With such low power and a standard 50 Ohm load, interference shouldn't occur theoretically, so I started troubleshooting software issues. I haven't used the Q900 machine before, but the troubleshooting approach should be similar. You can also try troubleshooting in the same way.