The P3 is Visual display of the RF spectrum, it is what the high end radio have been using for the past 20 years (IC-9000). I am using this in conjunction with the Elecraft K3-S, their latest 100W ...

Although it's a little late, I'm uploading all the files I have relating to the k3-ah4 interface so hopefully others can reproduce it without needing to rely on me checking my GitHub messages ...