K3: Firmware 2.10 NR audio gain

[KM5Q]

I just upgraded from 2.02 to 2.10 beta. Before, NR gain equalzation  
(between on and off) was such that when I turned on NR, I had to  
increase the AF GAIN to compensate for audio drop.

Now, the gain equalization has been shifted the other way. When I turn  
NR on, the gain goes UP. NR is working nicely, but I have to turn the  
gain DOWN unless the signal is weak.

I think they overcompensated with this new firmware. I would rather  
they set the equalization in between the previous version and this  
one. That way switching in NR will be a one-tap operation under all  
conditions.

It think the audio quality of NR is better now (less reverberation and  
distortion) but that is a different subject.

Windy KM5Q
K3 #176
Santa Fe, NM
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[KK7P]

> Now, the gain equalization has been shifted the other way. When I turn
> NR on, the gain goes UP. NR is working nicely, but I have to turn the
> gain DOWN unless the signal is weak.

The NR gain compensation required will vary with the S/N of the signal
as well as its strength, and with the second value in the NR setting (-1
through -4).  Any setting is a compromise :-)

73,

Lyle KK7P

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[N5GE]

On Sat, 28 Jun 2008 16:35:11 -0600, KM5Q <[hidden email]> wrote:

>I just upgraded from 2.02 to 2.10 beta. Before, NR gain equalzation  
>(between on and off) was such that when I turned on NR, I had to  
>increase the AF GAIN to compensate for audio drop.
>
>Now, the gain equalization has been shifted the other way. When I turn  
>NR on, the gain goes UP. NR is working nicely, but I have to turn the  
>gain DOWN unless the signal is weak.
>
>I think they overcompensated with this new firmware. I would rather  
>they set the equalization in between the previous version and this  
>one. That way switching in NR will be a one-tap operation under all  
>conditions.
>
>It think the audio quality of NR is better now (less reverberation and  
>distortion) but that is a different subject.

I have noticed the same, but I am not unhappy with it.  However it occurs to me
that setting the AGC slope to compensate might be worth trying.

Tom, N5GE - SWOT 3537 - Grid EM12jq

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