Dave, I believe you are asking for a more "rounded knee" on the AGC attack curve. I don't know if that is feasible without a lot of work on Lyle's part - he would have to answer. Right now, (as you noticed) the slope of the AGC line between the threshold point and the point where the hardware AGC kicks in is almost linear. I am not certain how much more computation would be required to produce a more rounded knee, nor how fast the DSP engine can compute a more complex function - if there is not adequate engine speed, things could become quite distorted.
Changing that function should not change the threshold levels - the point where the knee occurs just depends on the threshold, and the shape of the knee should not influence it. In use, a softer knee may make the use of a lower threshold more practical. 73, Don W3FPR Dave - AB7E wrote: > I also think that the current max AGC threshold is too low, but I have > another question. Why is it necessary for the K3 AGC to have such a sharp > elbow at the point where the AGC kicks in? The Clifton Labs plots show such > a sharp bend that it seems multi-signal in-band intermod is inevitable, > especially with higher SLP settings. Wouldn't it be feasible, and more > desirable, to have some more gradual inflection point? I would think that > something like a parabolic shape would be better, and the DSP AGC is just the > implementation of an algorithm, correct? I suppose that would tend to blur > the distinction between different THR settings, but so what? > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
