[Elecraft] [P3] Can I?

[Mike Reublin NF4L]

> On Nov 21, 2015, at 11:12 PM, Alan <n1al at sonic.net> wrote:
> 
>> What I'm looking for is that when I tune either the B VFO or the B
>> marker up band, it reaches the far right edge of the screen when I
>> get to 3.529, instead of reaching 3.529 when it gets just to the
>> right of the screen center.
> 
> To do that the span has to be 5 kHz.  (3.529 MHz - 3.524 MHz = 5 kHz)
> 
I'll have to play and see if that does it.
>> In this set-up moving the B marker moves the A & B cursor and the
>> marker and changes the center freq. displayed on the screen. That
>> isn't desirable.
> 
> I don't understand that.  Moving VFO B or either of the markers (A or B) should not cause the center frequency to change.  That only happens if VFO A is moved.  (Tracking mode)
> 
Hmmmm....Now it doesn't do that.
>> I don't want to change the span, just the amount of real estate it
>> covers.
> 
> But the span IS the amount of real estate that the screen covers.  It is the difference between the frequency at the right edge and the frequency at the left edge.
> 
To me, span and scale are different. Span is the number of units between two points, scale is the physical size those end points cover.

Consider a map of the U.S. The span is 4000 miles. It's printed on a piece of paper the size of a postage stamp. You don't see much detail. Now consider that the same map is printed on a piece of paper 8.5 by 11. The span is still 4000 miles but the scale has changed dramatically, and now you can see some detail.

I'm rarely if ever interested in what's happening on both sides of a given frequency, just usually up the band, less often down. If the paradigm was edge to edge rather than center to edge......

Thanks for the discussion, Alan. I've deduced that the answer is no. 

73, Mike NF4L