My 6300 pops and crackles while transmitting digital signals (DAC). I'm not using Remote. The radio and computer is wired through a gigabit switch and lan. All Ethernet cables have 31 mix ferrites on both ends. I can hear the pops and crackles with the monitor selected and also see the pops and crackles on the waterfall. With the waterfall display turned on during TX they look like horizontal spikes. Since I do not have another SDR receiver I'm unable to verify if these noises are actually going out over the air however I suspect they are. The radio has so many nice features and I enjoy running JT65, JT-9, PSK modes but I'm very unhappy with these random annoying sounds. This is not what I would expect out of a "Signature Series Radio" !