[Elecraft] DSP Noise Reduction and contesting

[Johnny Siu]

Hello Tony,
 
I concur with your observation.  In SSB, the NR in Icom is far better.  Among all the 8 x 4 = 32 choices in NR settings in K3, I am afraid that none of them is as good as that of NR of Icom in SSB.
 
The success of the implementation of IF DSP will depend on:
 
1.  the processing power of the DSP chip set;
2.  the ability to write an efficent firmware to optimise the performance of the DSP chip set.
 
Surprisingly, while I was told that the NR in KX3 was the same as that in K3, I feel the NR in KX3 sounds better and less artifact.
 
I trust elecraft keeps on looking for ways to improve the NR performance.

 
TNX & 73,


Johnny VR2XMC


________________________________
 寄件人︰ "N2TK, Tony" <tony.kaz at verizon.net>
收件人︰ elecraft at mailman.qth.net 
傳送日期︰ 2012年11月7日 (週三) 7:28 PM
主題︰ Re: [Elecraft] DSP Noise Reduction and contesting
  
Hi Arie,
I totally concur with your comments below. 
Since my first K3 (#311) I have whined about the NR, especially for SSB. NR
now works pretty well on CW, but I rarely use it on SSB.
My NR standard is still Icom. It is simple to use - one knob. And at low
levels it takes out the background noise to make listening for long times
more comfortable without affecting the quality of the signal as much as the
K3. 
When I use NR on CW I use F1-1 and on SSB F5-1.  I can't imagine using
higher numbers as the intelligibility, especially on SSB degrades rapidly.
And yes, if I am going to use NR I use it on the low bands, especially in
the summer along with the NB.

Overall I like the K3 much more than the Icom. But I do like the NR on Icom.


73,
N2TK, Tony



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Arie Kleingeld PA3A
Sent: Tuesday, November 06, 2012 3:30 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] DSP Noise Reduction and contesting

Hi Pete,

The NR of the K3 is not a feature that shines. That's why I never tried it
in contests. But in a few weeks there's the CQWW CW again. Maybe I will give
it a go.

My two cents worth on the NR of the K3.
When applying NR I woud expect a better S/N ratio of some kind on a weaker
signal (that's why it is called NR). On SSB I never found a setting that
increased the S/N ratio or readability of the signal to MY ears (settings
F5-1 to F8-4)

CW works better (F1-1 to F4-4)  but I seldom use it. For good S/N ratio I
rely totally on the K3 filtering with APF as last resort. The only time I
really loved the NR, was when I worked on 160m in the 9L5MS dx-pedition (in
tropic thunderstormy Africa) for the whole night. It kept the fatigue of
constant static noise away.

73
Arie PA3A



Op 5-11-2012 23:37, Pete Smith N4ZR schreef:
> I've read Fred Cady's book and the manual, and I'm still at sea - 
> anyone have opinions or recommendations about using NR for CW or phone 
> contesting?  I assume the settings are probably different.
>


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