Bill W5WVO wrote:
>
> Julian et al.,
>
> I have always used VOX for WSJT keying, so I tried setting it up for RTS
> control
> as you suggest above. But when I try to configure the K3 for ether PTT=RTS
> or
> PTT=DTR with NO RS232-controlling application (like WSJT) running, the rig
> keys
> up (and switches into TEST mode automatically as per the manual). If I
> then
> disconnect the serial cable at the laptop serial connector, the keyed
> condition
> disappears.
>
> My conclusion is that the laptop's serial port is asserting RTS and DTR
> full-time for some reason. It's a 2-year-old Dell Latitude D820, Core2
> processor, 2 GHz, 2 GB RAM, running XP Home. It has one true RS232 port
> (COM1),
> the one I'm using. Flow control is set to NONE, so it should not be
> asserting
> these lines by default. Has anyone ever encountered this?
>
>
For many years I have used RTS for PTT and CW keying with various software
and radios and I have never come across this. Normally if the rig is
switched on when the computer starts up the RTS (PTT) is briefly toggled
three times during the startup procedures but it is always left on the off
position. It seems an unlikely thing for Dell to deliberately do, so I
wonder if you have some program or driver that tries to scan the serial
ports at start-up and leaves RTS / DTR in the wrong state afterwards.
There is one program I find that leaves RTS on when it closes and very
annoyingly it is Fldigi for Windows which I use rather a lot. But apart from
WSJT there is WSPR and the AGWPE packet engine that all use simple PTT
control so I really need to leave that K3 option enabled.
While typing this I had a stroke of inspiration. If you type the command:
mode com1 rts=off dtr=off
in a command window that should turn RTS and DTR off. So if you could put
that command into whatever the Windows XP equivalent of autoexec.bat is
(assuming there is one) that should solve the problem.
-----
Julian, G4ILO. K2 #392 K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html
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