KX3 PBT

[hhoyt]

I have been twisting the KX3's PBT I/II knob madly in an attempt to
change BW or CF rapidly, but in reality when I turn it more slowly the
function actually changes more rapidly.  Two possible explanations are
either the encoder pulse rate exceeding the I/O refresh rate, or the
speed with which the filter DSP can reconfigure.

I would love to be able to change CF and BW more rapidly, being spoiled
by the instantaneous response of my old Drake R-4B's analog IF
parametric filter.  If the speed limitation with the KX3 is indeed a
refresh issue, is there a way to increase the I/O refresh rate for the
PBT encoder to allow for faster filter change via the knob? Of course,
if it is a DSP horsepower issue, it is what it is.

The overall performance of the KX3's receiver is so far superior to the
R-4B, I don't want to use the R-4B much any more (well for that reason
plus tube, old capacitors, size, power requirements and other issues,
but that is another story).

Howie - WA4PSC


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[Andrew Moore-3]

I'll put in a vote for this improvement in a future firmware release too,
if it's possible.

It would make the knob feel more responsive, and would be consistent with
the behavior of the adjacent knobs.

--Andrew, NV1B
maineware.net
..

On Mon, Sep 24, 2012 at 11:29 AM, Howard Hoyt <[hidden email]> wrote:

> I have been twisting the KX3's PBT I/II knob madly in an attempt to
> change BW or CF rapidly, but in reality when I turn it more slowly the
> function actually changes more rapidly.  Two possible explanations are
> either the encoder pulse rate exceeding the I/O refresh rate, or the
> speed with which the filter DSP can reconfigure.
>
>
>
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[wayne burdick]

Howie,

I may be able to make the control more responsive. Meanwhile, you  
might experiment with the NORM function as a means of switching  
between two different width settings. Holding NORM will alternate  
between the default (400 Hz in CW mode) and a "floating" setting that  
you establish.

73,
Wayne
N6KR


On Sep 24, 2012, at 8:29 AM, Howard Hoyt wrote:

> I have been twisting the KX3's PBT I/II knob madly in an attempt to
> change BW or CF rapidly, but in reality when I turn it more slowly the
> function actually changes more rapidly.  Two possible explanations are
> either the encoder pulse rate exceeding the I/O refresh rate, or the
> speed with which the filter DSP can reconfigure.
>
> I would love to be able to change CF and BW more rapidly, being  
> spoiled
> by the instantaneous response of my old Drake R-4B's analog IF
> parametric filter.  If the speed limitation with the KX3 is indeed a
> refresh issue, is there a way to increase the I/O refresh rate for the
> PBT encoder to allow for faster filter change via the knob? Of course,
> if it is a DSP horsepower issue, it is what it is.
>
> The overall performance of the KX3's receiver is so far superior to  
> the
> R-4B, I don't want to use the R-4B much any more (well for that reason
> plus tube, old capacitors, size, power requirements and other issues,
> but that is another story).
>
> Howie - WA4PSC
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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