I've tried using the dual PB capability of the K3 on RTTY but can never seem to get a RTTY signal through it to be able to decode (I am using MMTTY). No problem without using the DPB filters. So if someone has the time might you walk me through the settings you use for the K3 and RTTY? Roofing filter, offsets (if any) and such? Thanks! Ron N4XD