[Elecraft] P3 beta, A/B operation

[Joe Subich, W4TV]

The "odd" frequency limits appear to be related only to changing
between fixed and tracking modes.  When switching from tracking
to fixed, the display frequency limits are "fixed" at the "odd"
values based on (VFO A +/- span/2) instead of being forced to the
correct "round" (5, 10, 20, 25, 50, 100 KHz) value for the current
span.

Since the fixed/track mode is stored on a per band basis, stepping
through the bands will screw up the frequency limits when moving
from a fixed band to a track band and back.  This behavior has not
changed even with the most recent (private) firmware release.

Simply put, when changing from tracking to fixed mode, the LF end
of the display range should be set to the "correct" round value -
offset from the bottom of the current band by a multiple of span/2
to place VFO A in the center half of the span.  The VFO A cursor
should be shifted to accommodate "round" display limits (as if the
mode had already been fixed) rather than creating "odd" limits
around the "centered" position of the VFO A cursor.

In addition, Fixed/Track should be a global setting ....

73,

    ... Joe, W4TV


On 6/23/2011 2:16 PM, Guy Olinger K2AV wrote:
> Does the rounding off change with the various settings of FINE,
> COARSE, either on the front panel or CONFIG:VFO CRS, or mode?
>
> 73, Guy.
>
> On Thu, Jun 23, 2011 at 2:55 AM, Stephen Prior<eastbrantwood at gmail.com>  wrote:
>> Alan, I'm sorry to say this but nothing seems to have changed for me in the
>> rounding off.  It will be interesting to note what others find.
>>
>> 73 Stephen G4SJP
>>
>>
>>
>> On 23 June 2011 07:21, Alan Bloom<n1al at sonic.net>  wrote:
>>
>>> Actually, there was a bug introduced in 1.08.  Try this:
>>>
>>> 01.09 is at ftp.elecraft.com/tmp/P3/alpha/
>>>
>>> Alan
>>>
>>> On Sun, 2011-06-19 at 13:04 +0100, Stephen Prior wrote:
>>>> I made exactly the same observation to Alan N1AL.  He managed to persuade
>>> me
>>>> that it had always been like that ;-)
>>>>
>>>> 73 Stephen G4SJP
>>>>
>>>> On 19 June 2011 06:25, Corin&  Alan<alanandcorin at yahoo.com>  wrote:
>>>>
>>>>>
>>>>>
>>>>> I sometimes use the A/B to switch between the CW and phone section of a
>>>>> band.  I like to set the P3 to FixMode and adjust the right edge to
>>> align
>>>>> with the band edge, say 14.000.0.  So if I set VFO A to 14.025 in CW
>>> mode
>>>>> and switch to VFO B at 14.240 also in CW mode I can switch back and
>>> forth
>>>>> and the edge shown on the P3 stays set to 14.000.0.  However, if VFO B
>>> is
>>>>> set to 14.250 in USB, when I switch back to VFO A the edge shown on the
>>> P3
>>>>> changes to 14.001.5?  Huh?  Otherwise, I like to new cursor and
>>>>> improvements.
>>>>>
>>>>> 73s, Al, K6IV
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