Posted by
wayne burdick on
Feb 10, 2009; 10:59pm
URL: http://elecraft.85.s1.nabble.com/K3-Beta-firmware-rev-2-80-Improvements-to-AFSK-A-DATA-A-SSB-AM-FM-DVR-tp2305650.html
K3 beta-test firmware revision 2.82 (with DSP rev 2.00) is now
available. See release notes below.
Please send any problem reports to
[hidden email]. For
instructions on how to load beta firmware, please see:
http://www.elecraft.com/K3/k3_software.htmWe also recommend that you use the latest revision of K3 Utility, which
can also be found on this page.
73,
Wayne
N6KR
* * *
MCU 2.82 / DSP 2.00, 2-9-2009
Data Mode Changes:
* AFSK MODE TRANSMIT FILTERING: Some K3 owners have reported
hearing noise on their RTTY transmit signal when using AFSK-A mode.
Possible
sources of noise include RFI, ground loops, low AF level, or poor
mark/space
transition shaping by software. The effects of noise from many sources
can
be eliminated by using a narrow, constant-delay transmit filter (DSP).
To enable this filter, set CONFIG:AFSK TX, to FIL ON (default is OFF).
* SSB/DATA-A/AFSK-A TRANSMIT POWER LEVEL: Power output in these
modes now more closely tracks TUNE power. We recommend setting
CONFIG:TXG VCE to 0.0 dB after loading this release, then adjusting only
if necessary.
* DATA MODE ALC METERING: ALC metering for DATA-A and AFSK-A
modes has been adjusted to make the transmit audio level easier to
adjust.
As before, the recommended audio level for transmission is 4 to 5 bars.
3 bars will appear as soon the minimum required level for good S/N ratio
has been reached.
* FSK POLARITY MENU ENTRY: Setting CONFIG:FSK POL to 0 reverses
RTTY data polarity (applies only to FSK-D mode transmit) . Note: If you
use
the ALT switch to select DATA REV mode, this reverses both RX and TX
tones, in both AFSK-A and FSK-D modes. This should rarely be required.
FSK POL can be used by itself or in combination with DATA REV.
Misc. Changes:
* DVR MESSAGE CANCEL WITH PTT OR VOX: Both one-time and repeating
DVR transmit message play can now be cancelled cleanly with either
PTT or VOX.
* AM MODE SPEECH COMPRESSION: Speech compression is now
available in AM mode. This can add punch to your AM signal. As with any
type of compression, it should be used only when necessary.
* FM TX DEVIATION: This is now more accurate. Previous versions could
underdeviate by as much as 1 kHz. Setting is now accurate from 3.0 kHz
to
5.0 kHz of deviation when modulated by 1 kHz tone with 5 bars of ALC
indicated.
For software developers:
* “BN” COMMAND ADDED (Band Number). GET only. This command returns
the K3’s present band number (0-10 = 160 m - 6 m, 11-15 reserved for
future use, 16-24 = XVTR bands 1-9). It is useful for software
applications
that need to know if the operator has tuned the VFO across a logical
band
boundary. This eliminates the need for applications to keep track of
what the
K3’s internal band boundaries are.
---
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