Re: K3 DSP AGC Question

Posted by Joe Subich, W4TV-4 on Feb 08, 2010; 5:01pm
URL: http://elecraft.85.s1.nabble.com/K3-in-a-cw-pileup-needs-work-tp4523884p4535476.html



> Likely?  I don't know.

Likely is a better choice since raising the AGC threshold
seems to be the primary goal of much of the "PRE/ATT/RF
Gain dance" we've seen recently.

The hardware AGC (HAGC) would seem to provide an ultimate
limit on level to the ADC - unless the ADC can't handle
the transient peaks - so a higher threshold for the DSP
derived AGC would be helpful in many ways.

73,

   ... Joe, W4TV
   

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Lyle Johnson
> Sent: Monday, February 08, 2010 11:24 AM
> To: [hidden email]
> Subject: Re: [Elecraft] K3 DSP AGC Question
>
>
> Hello Joe!
> > Assuming that the threshold values have not changed in a major
> > way since Jack's measurements, would it be possible to extend
> > the range of threshold values - say to AGC THR=016 at about
> > -80dBm (assuming 2 dB per step)?  
> >  
>
> Possible?  Yes.
>
> Likely?  I don't know.  There are a lot of side effects that
> happen when the threshold is raised...
>
> 73,
>
> Lyle KK7P
>

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