I made a few changes to the KX3 firmware. I'd be happy to send it out to anyone interested in the changes. See release notes below.
* * *
KX3 MCU 2.52 / DSP 1.37, 3-19-2016
* HOLDING RIT CLR UPDATES RIT OFFSET AT PX3 PANADAPTER.
For software developers:
* POWER-OUTPUT CONTROL COMMAND (“PC”) FIXED: The "PC" command now correctly handles the KX3’s power ranges (up to 12 W or 15 W depending on band).
* PSK31/PSK63 SELECTION (ETC.) VIA REMOTE COMMAND: When the DATA submode is being modified under remote control, a software application can now select between PSK31/PSK63 using the UP/DN (VFO A) control commands. Similarly, UPB/DNB (VFO B) can be used to select the desired TEXT decode mode (DEC OFF, TX ONLY, RX THRn). To determine the current state of any of these parameters, you can use the DS or DB commands. Refer to the Programmer’s Reference for further details.