[Elecraft] [P3] Can I?

[Alan]

On 11/20/2015 04:35 AM, Mike Reublin NF4L wrote:
> I'm not doing a a good job of explaining I think.
>
> The rig is at 3.524. I double-tap the Split button to equalize the
> VFOs, then hold Split. The P3 is set to a span of 10, i.e. -5 appears
> to the left, +5 appears to the right. I set the P3 to tracking mode
> and move the green cursor to the left edge of the screen.

I assume you mean you use the CENTER control to move the center 
frequency up 5 kHz so that the VFO A (green) cursor is at the left edge 
of the screen.  At this point the left edge of the screen is at 3.524 
MHz and the right edge is at 3.534 assuming the span is still 10 kHz.

> 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)

> 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)

> 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.

Sorry, I'm probably still missing something.  :=)

Alan N1AL