[Elecraft] Sloped AGC

[Jack Smith]

You might be interested in the AGC input versus output performance data 
I  took for the K2 and several other receivers.
http://www.cliftonlaboratories.com/receiver_agc_curves.htm

To some extent, the K2 already implements this feature. Whether this is 
an intentional design decision or a byproduct of other decisions made 
during the K2's design, I do not know. In my opinion, it is one of the 
reasons for the distinct "K2 sound."

Jack K8ZOA
www.cliftonlaboratories.com


Bill Tippett wrote:
> K8CV:
> >I found a neat option on the new Orion II that seems great cw. It is 
> not in
> the manual. It is called slope or something like that. It is the last 
> item
> in the RX menu. It has to do with the audio and normal is flat, 
> probably for
> SSB ? But you can set the slope to 1.1 or 2.2 db and I first tried it 
> on 80M
> noise and didn't seem to do a thing. Naturally I said " oh well " and 
> later
> gave it a try on cw and a BIG difference. The signal seems to pop up 
> out of
> the noise. Neat ........... will my sometime this year K-3 have that ?
>
>         Yes, see below.  73,  Bill  W4ZV
>
> KK7P:
>
> In the menu, you can set the following parameters for AGC:
>
> Attack time, Hold (Hang) time, Decay rate (in dB/sec for Fast and 
> Slow), Threshold, and Slope. Slope sets the compression you get from 
> AGC, whether you like everything above the threshold to be flat (S4 
> and 40 over S9 are the same level) or some sort of slope (2:1, 10:1 
> whatever) so stronger signals are somewhat louder.
>
> http://www.ac6rm.net/mailarchive/html/elecraft-list/2007-04/msg00935.html
>
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