[Elecraft] P3 vs SDR-IQ

[Walter Underwood]

On Jul 31, 2015, at 9:51 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:

> What you want is not possible -- Averaging is working on the IF signal. We can choose to always center it, or tune across it. When we tune in Tracking Mode, it MUST begin averaging again.


Not quite impossible.

It could keep the averaging for the portion of the spectrum that was displayed, and start new for the newly-displayed portion. Why throw away good data?

Or, it could overscan and keep averaging for an invisible area beyond the edge of the display, then roll that into view as needed.
 
Obviously, with either one, if you tune too fast, you get into an area with no averaging data.

I’m really surprised that this is a new idea. The first time I used a bandscope, on an IC-756, I found the loss of averaging to be obviously broken with a straightforward fix.

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