[Elecraft] K3 Beta firmware rev. 2.72: updated DVR support, etc.

[wayne burdick]

K3 beta-test firmware revision 2.72 (with DSP rev 1.98) is now 
available. Anyone who has the KDVR3 (Digital Voice Recorder) installed 
will need this revision to use the DVR. We'll be making further 
improvements to DVR functions in later releases. Full details appear 
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 2.72 / DSP 1.98, 12-9-2008

Misc. Changes:

* LINE OUT INCLUDES TX AUDIO: LINE OUT (nor menu setting) now includes
transmit sidetone and speech/data monitor audio.

* IMPROVED TX PASSBAND FLATNESS FOR PSK31: When operating in PSK31
mode via a PC, high-pitched audio tones are no longer attenuated more 
than
low tones.

Support for Digital Voice Recorder option (KDVR3):

Note: The following information is more accurate than the DVR 
instructions in the
K3 rev D owner’s manual.

* DVR ICON: The DVR icon (dual arrows--above the S-meter) turns on 
whenever
the DVR is in use. The icon flashes slowly during all record 
operations, and quickly
during play.

* DVR TX MESSAGES: Message record, play and repeat are functional. 
(Message
chaining will be added in a subsequent release.) To start voice message 
record,
tap REC, then tap M1-M4. Record will start immediately. Tap M1-M4 again
to stop recording. To play a voice message, tap M1-M4. To repeat a 
voice message
(e.g., a CQ), *hold* M1-M4 rather than tap. Message play or repeat can 
be
cancelled at any time by tapping REC.

* DVR RX LOOP:  Hold AF REC to start receive-audio recording. Hold AF 
REC
again to stop record. Up to 90 seconds of audio can be recorded; beyond 
this,
earlier audio will be overwritten. Hold AF PLAY to start playback; 
press any
switch to stop. VFO B will show the playback position in seconds, 
relative
to the most-recently recorded audio segment. During PLAY, you can move
forward/backward through RX audio loop buffer by rotating VFO B. An 
asterisk
(*) beside the seconds counter shows the extent  of the most recently 
recorded
segment. Note: It is OK to record received audio continuously; this 
might be
useful as a way of catching audio events that you wish to examine later.
Record will continue even if you transmit. However, at present, silence 
is recorded
for the duration of any transmission.

* DVR RX LOOP PLAY IN TX MODE. First, enter voice transmit mode by 
holding
PTT or tapping XMIT. Then hold AF PLAY to start playback, and press any 
switch
to stop. CMP (speech compression) is automatically disabled. Note: 
Playback
volume of the RX loop buffer during TX mode is not yet adjustable.

For software developers:

* VOX STATUS ADDED TO IC CMD (separate flags for CW keying ‘VOX’
and voice/data audio VOX).


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