KX2 Firmware Information

KX2 MCU 2.69 / DSP 1.49, 9-6-2016

* PSK63 FIX:  DSP revision 1.49 corrects a problem with PSK63 mode. 

* ALT MD MENU ENTRY IMPROVEMENT:  Some users found that the ALT MD menu entry didn’t switch modes consistently or cleanly. This is a long operation internally to the firmware, so the VFO A knob rate was slowed down (parameter adjust).

KX2 MCU 2.68 / DSP 1.48, 8-23-2016

* AM MODE ADDED:  AM mode is now available on the KX2. (AM mode can be removed from the MODE switch rotation by setting MENU:AM MODE to OFF.) AM Receive: AM mode can provide a “warmer” sound when used to copy shortwave broadcast stations, and VFO tuning is less critical than when using SSB modes to copy AM. MENU:VFO CRS provides coarse-tuning selections of 1, 5, 9 and 10 kHz for AM mode. AM Transmit:  AM is far less power-efficient than SSB, so SSB is preferred for most communication purposes. However, AM is in use on the ham bands. A good place to look for AM signals is around 3.870 MHz at night. Note: Speech compression should in general be turned off when transmitting in AM mode (set MENU:TX CMP to 0). 

KX2 MCU 2.67 / DSP 1.48, 7-16-2016

* ALT MD (Alternate Mode) MENU ENTRY IMPROVED:  When ALT MD is assigned to the programmable function switch (PFn), holding the switch selects NOR or ALT on successive presses without remaining in  the menu. (ALT MD is used to select between LSB/USB, CW-norm/CW-reverse, or DATA-norm/DATA-reverse on a per-band basis.)

KX2 MCU 2.66 / DSP 1.48, 6-24-2016

* DSP BUG FIXES: Eliminates the “ERR DSP” and “ERR DSE” error conditions that appeared on a small number of KX2s, typically at power-up.

KX2 MCU 2.62 / DSP 1.46, 6-15-2016

* MIC BTN, MIC BIAS, and all VOX MENU SETTINGS ADJUSTABLE IN ALL MODES: Locking these out was causing problems in some cases. None of these settings apply to the internal mic, but you can now adjust them with or without an external mic plugged in.

KX2 MCU 2.61 / DSP 1.46, 5-31-2016

* AUDIO-CW USER INTERFACE IMPROVEMENTS:  The KX2 can emit CW characters when switches are pressed and knobs are turned, etc. For details, see the document, “Elecraft KX2 Physical Description and Audio-CW User Interface.” Audio-CW tones can be enabled in the menu (see MENU:SW TONE), or on power-up, by holding APF along with RATE and A/B. Release RATE and A/B first, then release APF. This sets the speed to 20 WPM. The menu entry provides more speed selections. 

KX2 MCU 2.60 / DSP 1.46, 5-11-2016

* MONITOR LEVEL CONTROL GRANULARITY IMPROVED.

* AF GAIN CONTROL GRANULARITY IMPROVED.