[RTTY] FSK and Dell PC with TS2000

[Joe Subich, W4TV]

 > I suspect there is an issue with the Com port on the dell PC and
 > the RTS line being held high or low which ever that is until the
 > MMTTY program opens.  I have already tried updating the BIOS for
 > the system Mother board no difference, check setting in bios all
 > appears to be proper, at least there is no selective options I
 > can see that would change anything, I only have 2 Com Ports and
 > it does it on both .

There used to be some utilities floating around that would allow
setting the handshake lines on boot you might try google to find
one for your operating system (you don't say which version).

One other thing to try is to disable handshake in Windows Device
Manager ... click on each of the serial ports, select Port Settings
and set "Flow Control" to "None" or "Xon/Xoff."  Either of those
settings should cause the drivers to leave the DTR and RTS lines
low until enabled by an application.

If all else fails try a batch file (autoexec.bat) with:
   mode com1: 9600,n,8,1,,,,,off,off
   mode com2: 9600,n,8,1,,,,,off,off

Create the file in a text editor, then create a shortcut to
CMD that calls that batch file and place the shortcut in
your Windows Startup folder

73,

    ... Joe, W4TV

On 7/10/2010 9:50 AM, Marc Tessier - VE3TES wrote:
> Hello I have noticed a problem in my newest setup for MMTTY and My
> Dell desktop PC , and my home brewed FSK interface. Until windows
> boots up all is normal, then once the serial port initializes, I get
> a PTT lock up on my TS2000, my interface is the one shown for FSK on
> Dons AA5AU RTTY setup page. This same setup worked fine on my older
> PC, yet the newer Dell has an issue when ever MMTTY is not open my
> rig locks up in TX and when it is open all is fine. I suspect there
> is an issue with the Com port on the dell PC and the RTS line being
> held high or low which ever that is until the MMTTY program opens. I
> have already tried updating the BIOS for the system Mother board no
> difference, check setting in bios all appears to be proper, at least
> there is no selective options I can see that would change anything, I
> only have 2 Com Ports and it does it on both . To add an optional
> Serial card is also not an option today as the new pc only uses half
> height cards and my present serial ca rd in older pc if a full
> height.
>
> Any suggestion would be much appreciated as I am at my wit's end on
> this one, I would really like to put the new pc to use but until I
> resolve this issue its not going to happen...
>
> Thanks in advance and 73 de
>
> Marc Tessier - VE3TES
>