[Elecraft] A very desirable capability

[Walter Underwood]

That is a pretty good description of how the KX3 NR works right now, except it doesn’t have a graphic UI.

From the release notes for 1.47:

The RX NR menu entry can be used to adjust all three NR parameters (B=beta, D=decay, M=wet/dry mix). The M parameter now has a range of 0-10, matching the range available when the knob above the NR switch is used (see above). As before, all parameters can be adjusted separately for CW and voice modes. In most cases the factory default settings can be used for beta and decay, and the mix adjusted for the desired overall amount of NR using the knob (without using the menu). You can also now reset all NR parameters to factory defaults by holding CLR.

And from release 1.10:

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:  B (beta; tap ‘1’), D (decay; tap ‘2’), or M (wet/dry mix; 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—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.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Aug 22, 2017, at 1:07 PM, Peter Alterman <w2cdo at live.com> wrote:
> 
> Reading Drew's (AF2Z's) comment,
> 
> "The single most important feature that would get me to spring for a K4
> would be advanced noise abatement controls. I have little idea how the
> NR & NB work, but strictly from the user standpoint instead of scrolling
> through a small assortment of fixed presets I envision several
> continuously variable controls that would allow us to adjust the several
> noise limiting parameters. Perhaps having some kind of graphical display
> showing a dimensional representation of the noise parameter space and
> the noise itself would help in zeroing in on the best noise reduction..."
> 
> I wondered if such a graphical capability couldn't be created in software for the current set of Elecraft radios?
> That would be a great way to make the NB/NR capabilities of the current radios much more user friendly.
> 
> regards,
> 
> Peter W2CDO
> 
> 
> 
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