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KX3 Production Firmware (rev 1.10) -- Adds Noise Reduction (NR) and Autonotch

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wayne burdick

KX3 Production Firmware (rev 1.10) -- Adds Noise Reduction (NR) and Autonotch

Administrator

KX3 production firmware rev 1.10 (with DSP rev 0.94) is now available.
This release includes noise reduction (NR) and autonotch. NR
parameters are fully adjustable per-mode (using the RX NR menu entry)
to allow for experimentation, though the defaults are generally
recommended. See full release notes below. This update is appropriate
for all KX3 owners.

You'll need our KX3 Utility application to download and install
firmware. For full instructions, refer to our KX3 software page:

http://www.elecraft.com/KX3/KX3_software.htm

Thanks,
Wayne
N6KR

* * *

MCU 1.10 / DSP 0.94, 7-11-2012

* AUTO-NOTCH (AN) ADDED: Auto-notch can be used to automatically
reject interfering constant carriers in SSB and AM modes. (In all
other modes, manual notch is available.) To turn auto-notch on/off,
hold the NTCH switch. Note: Auto-notch is not available when AGC is
turned off.

* NOISE REDUCTION (NR) ADDED: Receive noise reduction reduces the
amplitude of random noise while preserving desired signals. (RX NR is
different from the VFO NR menu setting, which can be used to reduce
VFO tuning noise on the higher bands.) NR works in CW, SSB, and AM
modes. NR has a characteristic “hollow” sound. To turn NR on/off, hold
the NR switch. Also see RX NR x menu entry, below. Note: NR is not
available when AGC is turned off.

* RX NR x MENU ENTRY ADDED: Allows the user to customize receive noise
reduction (NR). The letter appearing at ‘x’ in the menu entry name
shows which parameter is being adjusted: "Beta" (B; tap ‘1’),
"Decay" (D; tap ‘2’), or wet/dry "Mix" (M; tap ‘3’). The defaults are
recommended, and this menu entry is locked to prevent accidental
changes. The NR settings for CW are separate from those for voice modes.

Using the RX NR menu entry: Unlock the parameter by holding KHZ for
about 3 seconds; the VFO A lock icon will disappear. Then tap ‘1’,
‘2’, or ‘3’ to select a parameter to change. You can turn NR on/off
while in the menu to test its effectiveness.

The default beta is 5 for CW and 10 for voice modes. A lower beta will
further reduce noise, but may attenuate weak signals. The default
decay is 240. A much lower decay value will allow NR to track fading
signals better, at the expense of somewhat worse noise rejection. The
mix value determines how much of the signal is “dry” (unprocessed) vs.
“wet” (processed). The default is 220 in CW mode and 250 in voice
modes (this is essentially “all wet”). You might want to use a lower
mix number to reduce the hollow sound or to minimize the effect of NR
on weak signals.

* KXBC3 BATTERY CHARGER/RTC SUPPORT (BAT CHG MENU ENTRY): To use this
menu entry, you must have a KXBC3 module and a set of internal
batteries installed. ONLY NiMH BATTERIES CAN BE CHARGED. Other battery
types can be installed to use the real-time clock and power the radio,
but attempting to charge them could damage your KX3, cause a fire or
acid leak, or other hazard. This will also void your warranty. Refer
to the KXBC3 instruction manual for further details.

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wayne burdick

Re: KX3 Production Firmware (rev 1.10) -- Adds Noise Reduction (NR) and Autonotch

Administrator

Relaying Ron's posting from the KX3 list.

Wayne

* * *

KU7Y wrote:

> My first impression of how the NR works:
>
> FANTASTIC!
>
> While working Dale, WC7S, I tried with and without NR. With NR
> active, the
> noise almost went totally away with no loss of his signal. He was
> S9 here,
> so no idea how it will work with a weak sig but at least all the
> signs are
> very positive!
>
> Thanks Wayne and crew. That made a big difference here in the RV
> park.
>
> Now to play with the adjustments!
>
> This is almost like getting a new radio every few days! Wheeeeeee
>
> OK, back in my hole,
>
> Ron, KU7Y
> SOWP 5545M
> Arizona Outlaws Contest Club
> Brenda, AZ (Winter)
> Caldwell, ID (Summer)
> [hidden email]
> http://www.hatpinsandmore.com
> KX3 #0062

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Vincenzo Calandra-2

Re: KX3 Production Firmware (rev 1.10) -- Adds Noise Reduction (NR) and Autonotch

Very impressive!
No other comment...

--
My best regards Vincenzo (IZ5GVP) KX3 sn 354

Il giorno mar, 24/07/2012 alle 13.54 -0700, Wayne Burdick ha scritto:

> Relaying Ron's posting from the KX3 list.
>
> Wayne
>
> * * *
>
> KU7Y wrote:
>
> > My first impression of how the NR works:
> >
> > FANTASTIC!
> >
> > While working Dale, WC7S, I tried with and without NR. With NR
> > active, the
> > noise almost went totally away with no loss of his signal. He was
> > S9 here,
> > so no idea how it will work with a weak sig but at least all the
> > signs are
> > very positive!
> >
> > Thanks Wayne and crew. That made a big difference here in the RV
> > park.
> >
> > Now to play with the adjustments!
> >
> > This is almost like getting a new radio every few days! Wheeeeeee
> >
> > OK, back in my hole,
> >
> > Ron, KU7Y
> > SOWP 5545M
> > Arizona Outlaws Contest Club
> > Brenda, AZ (Winter)
> > Caldwell, ID (Summer)
> > [hidden email]
> > http://www.hatpinsandmore.com
> > KX3 #0062
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html