[Elecraft] Using the P3 jumpy when tuning

Michael van Hauten vanhauten at t-online.de
Tue Dec 28 12:33:22 EST 2010


 a good solution  (for me ) could be to freeze the averaged signal for the seconds of tuning and moving the frozen signal on the screen. So you could see moving your determined signal to the filter section.
73, Michael

Am 28.12.2010 um 18:23 schrieb Guy Olinger K2AV:

> Averaging is clunky when tuning because BY DEFINITION a period must
> pass with accumulation of individual data points in order to make a
> display.  IF you leave averaging on when you tune, by mathematical
> definition, the display MUST lag behind where you really are tuned, by
> the averaging period.  This was exceedingly annoying, so ithe P3
> switches averaging off so it shows where you ARE instead of where you
> WERE.  With averaging on, once you've started to tune, there is now a
> difference between where you were and where you are and changing the
> screen off averaging necessarily involves a jump.  With tuning, having
> the P3 showing exactly where you are as the tuning progresses garners
> all the votes.
> 
> Just another version of between a rock and a hard place, caught
> between math and physics, and appearances.  What's a fella to do?
> 
> 73, Guy.
> 
> On Tue, Dec 28, 2010 at 9:56 AM, Robert Redmon <k5sm.bob at gmail.com> wrote:
>> On 12/28/2010 8:34 AM, Jim Sheldon wrote:
>>> I'm completely new to the world of the K3 and P3, but I actually can answer this one for you guys.  There is a parameter located in the P3 called "Set the refresh rate (ms).  If this is set to a large number the display will only refresh that often.  If it happens to be set to 500 ms (1/2 second) or even higher the display will appear very jerky.  Set that parameter down to around zero and you'll get quick sweeps that won't appear jerky at all.
>>> 
>>> Jim - W0EB
>> Thanks, Jim. That helped; however, part of the jumpiness is (apparently) related to the fact that when the K3 is tuned, the P3 switches out of "Average" mode. If I set Averaging to 2 (or off), and the refresh rate to 0, the display is stable when tuning the K3.
>> 
>> 
>> 73, Bob K5SM
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