KX3 firmware rev. 2.23 (with DSP rev. 1.30) enables the use of DUAL RX (dual watch)
even with RX SHFT set to 8.0 kHz in the menu. RX SHFT=8.0 can help optimize the KX3's performance in
the presense of large signals or power supply noise. Shifting the RX may also help in CW mode with dual watch enabled,
reducing audible keying artifacts.
NOTE: On any band where dual watch is turned on with RX SHFT set to 8.0,
the normal +/- 15 kHz dual-watch VFO A-to-B separation becomes -7/+23 kHz.
But the KX3 will, in all cases, automatically turn off dual watch if the VFO separation exceeds the limits.
Firmware files and instructions can be found here:
http://www.elecraft.com/KX3/KX3_software.htm
