Anyone know what the sometimes pop during the CW elements is a result of, some setting? At 2:10 it is not present, CW note sounds like what I am accustomed to, but at 1:20 there seems to be this effect. In either instance, rig seems to provide a very loud signal with very little band noise. <https://www.youtube.com/watch?v=DxJPsyniGlk>