[Elecraft] New K3 Firmware: Improved AGC (great for pile-upsaswell as general operation)

Wayne Burdick n6kr at elecraft.com
Tue May 15 00:21:58 EDT 2012


We'll eventually be making AGC THR and AGC SLP per-mode, which might  
help with such situations. You could optimize these settings  
differently for SSB (so that auto-notch worked optimally) and for CW  
(to allow for the case where many signals are nearly on top of each  
other).

73,
Wayne
N6KR

On May 14, 2012, at 8:56 PM, Rick Bates wrote:

> Thanks guys for the input.  I had an off list conversation with Lyle  
> and got
> my answer, Wayne was included too.
>
> The scenario was the morning 75M 'old guy' net.  During the lulls,  
> there was
> a ~15 db above the -110 db noise floor signal (I LOVE the P3!).   
> Auto notch
> would not take it completely out until I lowered AGC THR to 7 (from  
> 16).
>
> I restarted, cycled through auto and manual notch, no joy with auto  
> until I
> dropped the THR.
>
> If I understand it correctly, as you raise THR and/or SLP, it gets  
> harder
> for the auto notch to remove weaker signals (which this apparently  
> is).
>
> So now my goal is to find a reasonable compromise or define two  
> macros to
> make simple and quick changes, one for ragchewing and another for  
> DXing.
> But first I want to better understand what THR and SLP do and how they
> interact.  (NOT tonight!)
>
> Thanks again all (grazie e ciao!),
>
> Rick wa6nhc
>
> -----Original Message-----
> From: Pierfrancesco Caci
>
>
> It nicely notches away a broadcasting carrier at 7200 kHz here, tried
> with THR 12, 16 and 20.
>
> Pf
>
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