The laptop has a microphone, the K3 has a speaker. They are nearby. They can communicate. Dan / WG4S / K2 #2456 <snip> I have mixw open on my laptop next to the K3. Its copying all the psk signals.I have no cables or serial hooked to the Laptop. Been sitting here looking at the rig and laptop trying to rattle the brain. Any Idea's??? </snip>