Paul,
Comparing the technical side of the K2 DSP NR with the K3 NR is like
comparing apples and oranges.
The KDSP2 is DSP added at audio, while the K3 NR is done at the 15kHz IF.
The K3 offers many more settings that are available with the K2 DSP, so
I encourage you to experiment some more.
The way the NR algorithm works is that the DSP searches for what it
believes to be a correlated signal and builds a filter around that
signal. That may result in the 'robotic' voices that you mention.
Not all noises are the same, and you may have to find the settings that
deal most effectively with your particular noise - as I indicated,
experimentation may be necessary. You should look at the manual page
dealing with "Reducing Interference and Noise" for some clues and
cautions about NR. Check to see if Noise Blanking might be more
effective than NR for the type of noise you are dealing with. A
combination of the two can also be used if that should help.
73,
Don W3FPR
On 6/7/2016 5:16 PM, Paul Wilton wrote:
I have been using a K3S in a 2m SSB VHF contest this evening and find that the
DSP NR is a bit a disappointment compared with my usual K2 rig. My QTH has a
fair degree on man-made noise so on the K2, I normally run with the NR at level
4 (factory settings - I haven’t adjusted them). However, when using the NR on
the K3S this evening, when I adjusted it to get a similar amount of noise
reduction, I find that is accompanied by a lot of swooshing noise modulated
with an interval of between 0.5 to 3seconds. Also, the voices seem a lot more
robotic and harder to understand.
I did try all of the NR settings but didn’t really find one which matched the
niceness of the K2. Has anyone else progressed from a K2 to a K3 on VHF and
would like to comment on the effectiveness of the NR? And more importantly,
are there some settings I can try to get the K3S to sound like my K2?
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