[Elecraft] K3 Firmware Rev. 2.76: No AF noise burst; PRE/ATTN independent for sub RX; etc.

[wayne burdick]

K3 beta-test firmware revision 2.76 (with DSP rev 1.98) is now 
available. See release notes below.

Please send any problem reports to k3support at elecraft.com. For 
instructions on how to load beta firmware, please see:

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

73,
Wayne
N6KR

* * *

MCU 2.76 / DSP 1.98, 12-21-2008

* POWER-ON AF NOISE BURST:  This should now be eliminated.

* DIGIT 2 SWITCH TONE FEEDBACK RESTORED. The ‘2’ key on the numeric
keypad now provides tone feedback when used for numeric entry or within
menu entries. There’s no tone when it’s used as “REV” (temporary A/B VFO
reverse).

* SSB TX AFTER VFO A/B SWAP: Transmit filter settings are now correct
after any A/B swap, regardless of the modes of VFO A and B. This had 
been
noted by some customers as a problem on power-up, but it could occur
anytime the VFOs were in different modes at the time of an A/B swap.

* INDEPENDENT PREAMP AND ATTN FOR SUB RECEIVER: The preamp
and attenuator settings for the receiver are now independent of main.
On each band, you can set up the sub’s preamp/attenuator as desired
using BSET. The sub’s preamp/attenuator are separate even in diversity
mode, where you’ll often be using a lower-gain antenna for the sub 
receiver.
Note: A second tap of A>B within the 2-second window still copies all
main receiver settings to the sub, including preamp and attenuator.

For software developers:

* “FR0” COMMAND (SPLIT CANCEL): Now correctly restores the VFO A arrow
icon.

* CONFIG:KPA3 MENU ENTRY: The parameter for this menu entry is now
accessible via the “MP” command.

* “FA”/”FB” commands and loss of PLL lock: Large FA/FB frequency steps
were, on rare occasion, causing loss of PLL lock. This has been
corrected.

* Added "PA$" (sub RX preamp) and "RA$" (sub RX attenuator) commands.
This is in conjunction with the sub preamp and attenuator settings now
being independent of main (see above). During BSET, both return “?;”
at present.


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