[Elecraft] K3 Beta Firmware Release: Reduced FSK-D keying bandwidth, etc.

[wayne burdick]

K3 beta-test firmware revision 4.66 (with DSP rev. 2.81) is now  
available. See release notes below.

Please send any questions to k3support at elecraft.com. For beta firmware  
download instructions, see:

      http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

K3 MCU 4.66 / DSP 2.81, 3-22-2013

* FSK-D KEYING BANDWIDTH GREATLY REDUCED: This change reduces the  
amplitude of the FSK-D keying sidebands by 25-30 dB at a 500-Hz  
offset, giving the K3 one of the cleanest FSK signals available.

* K3/0 (REMOTE-RIG) IMPROVEMENTS: (1) Supply voltage can go down to  
7.6 V; (2) VFO lock works correctly; (3) TX LED no longer gets out of  
sync.

* IMPROVED HANDLING OF SERIAL I/O (RS232) ERROR CONDITIONS.

* SUPPORT ADDED FOR ALTERNATIVE LCD DRIVER IC. This has no effect on  
radio operation.

* RIT AND XIT NO LONGER TURNED OFF UNINTENTIONALLY: In previous  
releases, changing bands via direct frequency entry (FREQ ENT) or  
remote-control band change commands (FA, FB, and BN) would turn off  
RIT and XIT. This was true even if CONFIG:SPLT SV was set to YES.