[Elecraft] Serial Port Question...

David Cole dave at nk7z.net
Sun Jul 6 18:08:39 EDT 2014


Both were set at 100 Hz per click on the mouse wheel...  I believe that
is what you are asking.
-- 
Thanks and 73's,
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On Sun, 2014-07-06 at 17:45 -0400, Joe Subich, W4TV wrote:
> What is the command rate of MixW?  Each program has it's own polling or
> command rate and they can differ by a substantial amount.
> 
> 73,
> 
>     ... Joe, W4TV
> 
> 
> On 2014-07-06 5:15 PM, David Cole wrote:
> > I have a question about serial ports and the K3...  first let me set the
> > stage for the failures...
> >
> > Setup:
> > I have a K3, (two RX), and a P3, (SVGA), connected to my Windows
> > machine, which is running a fully updated and patched version of XP,
> > using a RS-232 serial cable, and the built in serial card, at 38K.  It
> > is a Dell machine.
> >
> > Test Bed:
> > If I use HRD, latest free version, to move the K3 main tuning dial
> > around, using the mouse wheel to increment the 100 Hz digit, I have zero
> > issues, the movement is snappy, and quick, there is no lag between my
> > end of motion in moving the mouse wheel and the K3 arriving at its end
> > of motion in changing frequency.  I.e. When I stop moving the mouse
> > wheel, the K3 is on frequency.  Exactly as it was on my Pro III.  Both
> > under HRD, AND MixW
> >
> > Now, if I switch to MixW, again latest version etc., same com port, same
> > comport speed, in fact same settings as far as I can see for everything,
> > I get a very discernible lag in the move event concluding.  It acts like
> > the K3 frequency is rate limited in how fast it can slew in frequency,
> > only when using MixW, and not when using HRD.  Exact same setup, and no
> > issues on the Pro III I used to have.
> >
> > I also have a very minor programming issue where by the the K3 fails to
> > fully program every channel using the K3 frequency management
> > software...  I get the failed timeout error now and then...
> >
> > All of this points directly to a serial port issue...  However...
> >
> > I have run this computer on many other pieces of hardware, (including a
> > Pro III, and Pro II), and had zero issues along this line.  I have run
> > the same hardware, and the same software, configured exactly the same on
> > the Pro III, and a Pro II, with zero issues.  I.e. I do not have the lag
> > issue on the Pro III, or Pro II. but do on the K3...  Same hardware,
> > same configuration, and same software, same cables, etc...
> >
> > No other issues with serial ports of any kind with the computer...  All
> > running under stock windows XP fully updated.
> >
> > Question:
> > Why does the K3 feel like the speed with which it changes frequency is
> > rate limited only under MixW, and not under HRD.
> >
> > I am at a loss, and looking for suggestions here...
> >
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