[P3] Another symmetry question

[k6dgw]

I have a K3/100.  For CW and RTTY below 10 m, I normally run a 20 KHz
span with the ends of the span on even 20 KHz boundaries [3500-3520,
3520-3540, etc].  I'm in Fixed Tune mode where the span edges remain
fixed and the VFO cursors move as I tune.  Tuning off the edge results
in a full 20 KHz shift [IAW, a new 20 KHz span].

When I change bands using BAND UP/DN, the P3 seems to preserve this
configuration from band to band.  The same seems to hold when I use
direct frequency entry.  However, when running N1MM+, typing a frequency
into the call sign window will go to that frequency on the radio but
will put the span edges at odd 20 KHz boundaries [3510-3530, 3530-3550]
and sometimes at 3515-3535.

Does anyone know how the P3 recalculates the span edges on band changes
from an external control program?  If I knew, I might be able to compensate.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
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[Bill Frantz]

I think the following issue may be part of the same problem.

For the WARC bands, I like to have the P3 set up to show the
whole band. When I use wsjt-x to switch to 17M, the P3 changes
from showing 100KHz between 18.068 and 18.168 to showing 100KHz
from 18.100 to 18.200. Annoying.

73 Bill AE6JV

On 1/8/18 at 3:34 PM, [hidden email] (Fred Jensen) wrote:

>When I change bands using BAND UP/DN, the P3 seems to preserve
>this configuration from band to band.  The same seems to hold
>when I use direct frequency entry.  However, when running
>N1MM+, typing a frequency into the call sign window will go to
>that frequency on the radio but will put the span edges at odd
>20 KHz boundaries [3510-3530, 3530-3550] and sometimes at 3515-3535.

--------------------------------------------------------------
Bill Frantz        | There are now so many exceptions to the
408-356-8506       | Fourth Amendment that it operates only by
www.pwpconsult.com | accident.  -  William Hugh Murray

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[w8fn]

This "feature" has been commented on in the past. It appears the P3
automatically recomputes the display limits in Fixed Tune mode if the K3
frequency is changed via the RS232 port (i.e., the P3 gets the frequency
change command). When I use the Band buttons on the KPA500 to change
bands the P3 display limits don't change -- probably because the
frequency change is commanded by way of the serial bus between the
transceiver and the amp.

I also find this quite annoying and would like the P3 to respect my
manual settings when a QSY is commanded.

73...
Randy, W8FN

On 1/8/2018 6:06 PM, Bill Frantz wrote:

> I think the following issue may be part of the same problem.
>
> For the WARC bands, I like to have the P3 set up to show the whole
> band. When I use wsjt-x to switch to 17M, the P3 changes from showing
> 100KHz between 18.068 and 18.168 to showing 100KHz from 18.100 to
> 18.200. Annoying.
>
> 73 Bill AE6JV
>
> On 1/8/18 at 3:34 PM, [hidden email] (Fred Jensen) wrote:
>
>> When I change bands using BAND UP/DN, the P3 seems to preserve this
>> configuration from band to band.  The same seems to hold when I use
>> direct frequency entry.  However, when running N1MM+, typing a
>> frequency into the call sign window will go to that frequency on the
>> radio but will put the span edges at odd 20 KHz boundaries
>> [3510-3530, 3530-3550] and sometimes at 3515-3535.
>
> --------------------------------------------------------------
> Bill Frantz        | There are now so many exceptions to the
> 408-356-8506       | Fourth Amendment that it operates only by
> www.pwpconsult.com | accident.  -  William Hugh Murray

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