I can't find 2.57 on the beta site (just 2.46). Was it removed, or am I
having a browser refresh problem?
  - 73, John, W0JFR



wayne burdick wrote:
> 
> K3 beta-test firmware revision 2.57 (with DSP rev 1.94) is now 
> available.
> 
> This is a major release. Some recent changes have had only limited 
> testing, but we wanted to get it out in time for this weekend's 
> contest. If you have any difficulty, you can easily revert back to the 
> last production version (2.46). Be sure to use the latest revision of 
> K3 Utility to do the downloads.
> 
> Please send any problem reports to [EMAIL PROTECTED] For 
> instructions on how to load beta firmware, please see:
> 
>    http://www.elecraft.com/K3/k3_software.htm
> 
> Highlights:
> 
> * SSB power control improved (no jumps in power while rotating the PWR 
> control during transmit; no upward spike when crossing the 12-W 
> boundary; SSB drive level not affected by tapping A/B, changing modes, 
> or doing an ATU TUNE. (NOTE: This doesn't address all issues with voice 
> peaks; we have further work to do on ALC. Also, a band change or memory 
> recall still reinitializes the SSB drive level. We're working on that.)
> 
> * SPLIT operation is now possible in diversity mode (requires sub 
> receiver). There are several user-interface changes related to this; 
> please review the release notes below carefully. Most noticeably, in 
> diversity mode VFO A still controls both receivers but the VFO B 
> frequency remains fully independent.
> 
> * First tap of A>B copies mode, if required (avoids accidental 
> cross-mode SPLIT)
> 
> * All known issues with CW/DATA message buffers fixed, including lost 
> characters during chaining
> 
> * Major improvements to CW-to-PSK31 operation -- faster transmit, and 
> no erroneous characters sent when using the keyer paddle
> 
> * Many new or improved remote-control commands for developers
> 
> Other details appear below.
> 
> 73,
> Wayne
> N6KR
> 
> * * *
> 
> MCU 2.57, 10-24-2008
> 
> Major changes and new features:
> 
> * SSB POWER CONTROL IMPROVEMENTS: (1) No jumps in power while
> rotating PWR control during transmit. (2) No upward spike when crossing
> QRP/QRO boundary. (3) No loss of SSB TX drive level when tapping A/B,
> changing modes, or doing an ATU TUNE. (4) These improvements may also
> lessen the effect of “spiking” external amplifiers, but further work on 
> the
> ALC routine is planned.
> 
> Note: The SSB drive does still get reinitialized to match the CW level 
> if you do
> a TUNE (this is desirable). This also happens if you change bands or 
> recall a
> memory (that will be fixed in the next release).
> 
> * FIRST A>B TAP COPIES MODE (if VFO A and B modes are different). This
> should greatly reduce the chance of having VFO B in the wrong mode when
> the operator later goes into SPLIT. (Those who want to do cross-mode 
> split
> can still set up VFO B differently using BSET mode, and should avoid 
> A>B.)
> Once the VFO modes are the same, operation of A>B is the same as before:
> A single tap copies only the frequency, while a second tap copies 
> everything.
> 
> * PSK31 (PSK D MODE) TRANSMIT IMPROVEMENTS:  Eliminated
> erroneous characters during CW-to-PSK31 transmit when using the keyer
> paddle. Also greatly improved PSK31 transmit speed by removing all
> extraneous “zeros” from the data stream.
> 
> * MARS operation now possible on 40 m up to 7550 kHz.
> 
> VFO Linking, Sub RX, Diversity Mode, and SPLIT:
> 
> * SPLIT CAN BE USED IN DIVERSITY MODE: During SPLIT, VFO B is only the
> transmit frequency. VFO A controls both receivers. So you now have a 
> choice when using SPLIT with the sub receiver: diversity receive, or 
> listening to both your
> RX (main) and TX (sub) frequencies simultaneously. Also see BSET note 
> below.
> 
> * VFO A-B LINKING: This is now indicated by slowly flashing the VFO B 
> kHz
> decimal point.
> 
> * A/B and REV CAN NOW BE USED IN DIVERSITY MODE. In both cases, the
> VFOs are swapped, allowing you to listen in diversity mode on VFO B’s 
> frequency.
> 
> * BSET IN DIVERSITY MODE: If you use BSET in diversity mode, you’ll now
> hear the main RX in the left ear and sub RX in the right. This is 
> useful when using SPLIT with diversity, as it allows you to override 
> diversity mode temporarily and listen to both your RX and TX 
> frequencies.
> 
> * VFO B NOT LOCKED WHEN LINKED TO VFO A: This means the VFOs can
> 
> be linked but at different frequencies. A fixed offset can be 
> established using
> VFO B, and will be maintained as you tune VFO A.
> 
> * VFOs NOT LINKED IN DIVERSITY MODE: VFO A is used to update both
> synthesizers (main and sub), but VFO B is now free to be used as a 
> SPLIT TX
> frequency (see below). In DIVERSITY mode, the VFO A kHz decimal point 
> slowly flashes, as before.
> 
> Miscellaneous:
> 
> * MESSAGE PLAY FIXES: There were a few issues with CW and DATA message
> buffer playback, including occasional truncated characters when 
> chaining in CW
> mode, and inconsistent behavior when chaining.
> 
> * MORE ACCURATE AM-MODE POWER LEVEL. Also slightly higher modulation
> percentage.
> 
> * INTERNAL 2-TONE TEST GENERATOR now works with 2.7 as well as 2.8
> kHz crystal filters, and the tones are now correct when used with both 
> LSB and USB.
> 
> * KEY OUT disabled sooner on power-up: Previously, KEY OUT was active 
> for
> about 3 to 4 seconds on power-up. This has been reduced to under one 
> second.
> In any case, no RF is present during this period.
> 
> For Software Developers (see K3 Programmer’s Reference, rev B14):
> 
> * “DS” (VFO A DISPLAY READ): This command now correctly handles all of 
> the
> RX EQ / TX EQ “mini-bar graph” levels as displayed in the main menu. 
> The bar
> graph level 1 character, if it appears in the “DS” response string, is 
> now converted to an underscore rather than a semicolon. This preserves 
> the semicolon as strictly a command terminator.
> 
> * "DT" COMMAND ADDED (VFO A DATA sub-mode read/set). "MD" is
> still used to set norm/rev.
> 
> * "IF" COMMAND INCLUDES DATA SUB-MODE ("K31" must be in effect).
> 
> * "IC" COMMAND ADDED (ICON and MISC STATUS): Provides state information 
> on many functions, including BSET, TX TEST, VFO linking, diversity 
> mode, sub RX antenna, full/semi QSK, dual-passband CW, dual-tone FSK 
> filtering, ESSB, nose gate, FM PL tone on/off, etc.
> 
> * “LK$” COMMAND ADDED (VFO B LOCK).
> 
> * “TQ” (TRANSMIT STATUS QUERY) now returns 1 consistently when the K3 
> is in
> transmit mode.
> 
> * MORE MENU ENTRIES ACCESSIBLE WITH “MP” COMMAND: KAT3, VCO MD, and AGC 
> THR are now available. See "MN" command table for details.
> 
> * "KY" (keying) remote control command now handles CR, LF, TAB and other
> ASCII characters including:   [ \ ] ^ _ `    All of these characters 
> are useful in PSK D mode. They’re ignored in other modes, except that  
> '_' becomes an
> "AA" prosign in CW mode.
> 
> * Prosign mapping (e.g., “=” conversion to “BT”) is now disabled in PSK 
> D
> and FSK D modes. This allows all ASCII characters to be transmitted 
> normally.
> (Prosigns can always be sent using the alphabetic characters themselves
> in these modes.)
> 
> 
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> 

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