[Elecraft] P3: Span control logic

[Don Wilhelm]

Lu,

I am sorry, but you will have to divorce your concept of width with the 
SPAN of the P3.  Instead of looking at the width of the signal, look at 
the range of the display - that is what SPAN has meant for many years to 
those familiar with  spectrum analyzers - it is the difference between 
the frequency on the left of the screen and that on the right of the screen.

Yes, the width of the signal being observed will shrink as the span is 
increased.  The SPAN term has no relationship to the width of any 
particular signal, it is only the extent of the display frequencies on 
the screen.

Alan, please do not change it - it makes sense to many (hopefully most) 
of us.

Lu, you may want to think of SPAN as the opposite of WIDTH.  I hope that 
helps..

73,
Don W3FPR

On 8/7/2011 6:34 PM, Luis V. Romero wrote:
> Hi all, especially the K3 Product Management folks:
>
> I now have some time behind the combination K3-P3, It is a wonderful
> combination.  Like fishing with a fishfinder! Now my neighbor has definitive
> proof in writing (a screen snapshot) that he is indeed 6.5kHz wide when he
> cranks up that Macho Bass to impress his buddies on 14.250 :)
>
> The P3 is a wonderful addition to my station's capability, however, there is
> one ergonomic detail that drives me absolutely bonkers!  I wonder if
> something can be done about it, as I may not be the only one with this
> issue.
>
> SPAN is equivalent to WIDTH to me.  On K3, turning the WIDTH knob to the
> left (counter colockwise) makes the width of the bandpass NARROWER
> (smaller).  Turning the knob to the right (clockwise) makes the bandpass
> WIDER.  I have always loved how this works in this radio, it is logical and
> intuitive to me, from my background in video... Video Production Switchers
> (Vision Mixers for the Brits among us) Key Clip controls work this way, and
> my feeble mind is used to this convention after many years of mental
> conditioning.  Equipment with similar controls (namely Yaesu rigs) are
> backwards to me.
>
> Having said that, on the P3, selecting SPAN and turning the knob to the left
> (counter clockwise) makes the span NARROWER, and turning it to the right
> (Clockwise) makes the span WIDER!
>
> Yes, I know... The VISUAL FEEDBACK from the K3 control matches the screen of
> the P3, which is good, but the INTENT of the action on the P3 SPAN control
> does not!  The WIDTH of the marker WIDENS when you turn the knob
> counterclockwise, but the actual EFFECT of the action you are performing is
> BACKWARDS from the visual feedback, and also backwards from the K3 control
> that does the same thing!
>
> Its like on a sailboat... Deflecting the rudder tiller AWAY from you turns
> the nose of the boat in the OPPOSITE direction from the tiller deflection.
>
> The chosen behavior of these controls and how they interact with the action
> and visual feedback is just absolutely counter intuitive to me... Any hope
> that this can be made a user selectable behavior so we can all have our cake
> and eat it too?
>
> Thanks for considering this request.
>
> -lu-w4lt-
> K3# 3192/P3 # 1301
>
>
>
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