[Elecraft] KDSP2 and Spectrogram

[Dale Boresz]

Ken Wagner wrote:

> Which IS a bit better than with the AGC turned ON... however, since I
> operate with the AGC turned ON, I'm not sure what it all means to 
> me<g>. The
>  
>
Hi Ken,

There are abolutely NO changes in the filter characterstics due to the 
presence or absence of AGC. During a sweep frequency measurement test 
however, the AGC will attempt to increase the receiver's gain as the 
sweep frequency falls down the skirts of the filters, and will attempt 
to decrease the receiver's gain when the sweep frequency is within the 
passband. It's just doing it's job, but it will throw off measurements 
because the receiver's gain is constantly changing. By turning off the 
AGC, you are simply guaranteeing that the receiver's gain remains stable 
for the duration of the test.

I predict that you'll find the KDSP2 will greatly improve the ease of 
listening with many qso's, and further, that it will make possible some 
contacts which would otherwise have been difficult at best, if not 
impossible otherwise.

Have fun!

-Dale / wa8sra