[Elecraft] KX3 Noise Reduction Performance

[Walter Underwood]

The noise on different bands has different sources and different characteristics. Noise at lower frequencies is generally non-stationary (a statistical measure) which makes it harder to remove.

I don't know why it would behave differently with the preamp on or off.

wunder
K6WRU

On Mar 20, 2013, at 4:35 PM, Ed Ketterer wrote:

> All,
> 
> Posted this a couple of weeks ago. Still looking for some thoughts on it...
> 
> The effect of the NR (DSP) feature on my KX3 appears to vary with the band I
> am on. On 80m and 40m, NR significantly reduces noise when the preamp is
> off, but has little effect when the preamp is on. On 30m and 20m, there
> might be a bit more noise reduction provided when the preamp is on, but
> again, the effect is much more dramatic when it's off. On 17m and above, I
> get very effective noise reduction regardless of whether the preamp is on or
> off. It would be nice if the NR feature provided similar noise reduction
> across all bands regardless of whether the preamp is on or off, and for me I
> would certainly like to see significant noise reduction on 40 and 20 with
> the preamp on. I have made no changes to the locked NR setting in the menu,
> and am running the latest firmware. Has anyone else experienced this? Any
> ideas on how to make the performance more consistent across bands?
> 
> Ed, K8SZN
> 
> 
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--
Walter Underwood
wunder at wunderwood.org