[Elecraft] KPA 100 - KIO2 not working...

Wed Mar 10 13:06:01 2004

Good news, the shot in the dark was spot on!!

After switching off the high current supply overnight everything worked 
automagically this morning!! This must have been a software problem, as I did 
not touch the hardware. All 3 problems, incl. the power scaling were solved.

Tnx everyone for the pointers... I can now control K2#1043 from tlf, and use 
it for contesting !

Interesting is, that all parameters were set the right way all the time. It 
just did not work... Guess the MC on the KPA 100 and the MCU on the control 
board were partially in some undefined state, everything else seemed to work 
normally...

73, 

Rein PA0R

On Tuesday 09 March 2004 19:45, Tom Arntzen LA1PHA wrote:
> Have you tried a reset of the rig?
> Just a shot in the dark!!!
> Tom LA1PHA
> ----- Original Message -----
> From: "Rein Couperus" <[email protected]>
> To: "Jack Brindle" <[email protected]>
> Cc: <[email protected]>
> Sent: Tuesday, March 09, 2004 7:39 PM
> Subject: Re: [Elecraft] KPA 100 - KIO2 not working...
>
> > Tnx Jack,
> >
> > Of course I first did the mods on the control board... and I have checked
> > that the signals come through from the MCU to U4 on the KPA100. Only they
> > are wrong!!. I have an RS232 tester, and I can see signals going from the
> > terminal to the rig, and I can see the voltage swinging a bit on the
> > input (MMU), but no reaction... as if the MCU is deaf. I have done
> > everything the manual said several times... Unfortunately I don't own an
> > oscilloscope. But the path from the terminal to the MMU looks o.k., it
> > just doesn't work.
> >
> > The other way (TXD) it's different. When I compare the RS232 monitor
> > status with e.g. my OMNI VI, on the OMNI the LED is RED, on the K2 it's
> > GREEN, i.e. wrong polarity. Also no flicker of the LED or voltage change
> > when I try to send the test message. And nothing on the terminal (works
> > fine with the OMNI, also at the same speed). And yes, of course I made a
> > special cable for the K2 according to the manual. The firmware is 2.03d
> > by the way...
> >
> > Rein PA0R
> >
> > On Tuesday 09 March 2004 18:19, Jack Brindle wrote:
> > > What version of K2 Control board do you have? It sounds like you have a
> > > Rev A Control board, and you haven't done the modifications to connect
> > > the
> > > serial port signals to the MCU. Make sure you have performed the steps
> > > on
> > > pages 51-53 of the KPA100 (Revision A) manual which modify this board.
> > >
> > > On Mar 9, 2004, at 6:13 AM, Rein Couperus wrote:
> > > > The second problem is worse. I cannot get the KPIO2 working either
> > > > way. On the TX side, Pin 5 of U4 (TXD) is +12.8 V instead of the -22
> > > > mentioned in
> > > > the voltage table. I checked with an ohmmeter, and it looks like this
> > > > voltage
> > > > must come out of U4. Is the voltage table wrong? Pin 12 of U4 is 0 V
> > > > instead
> > > > of the +5 from the voltage table. Tracing the signal back to the
> > > > control
> > > > board, pin 25 of U6 on the controlboard is 0 V as well, which shows
> > > > the connection is o.k. I have switched PORT=ON and TEST does not move
> > > > anything.
> > > > On the receive side the problem is different. I can follow the signal
> > > > from the
> > > > RS232 port through to U6 on the control board (pin 26). But 'SW01;'
> > > > is ignored by the MMU. The terminal is at 4800 8N2 (also tried 4800
> > > > 8N1).
> > > >
> > > > Has this behaviour been seen before? The faq is rather short on this
> > > > subject,
> > > > and the trouble shooting is limited to "check your terminal".
> > >
> > > - Jack Brindle, WA4FIB
> > > -----------------------------------------------------------------------
> > >- ---------------------
> >
> > --
> > [email protected] or [email protected]
> > http://www.couperus.com
> > http://savannah.nongnu.org/projects/tlf
> >
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-- 
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