Andy, LF,
I have had no problems with the serial port PTT control of WSPR.
With a normal 9-pin RS232 port, on the motherboard of the PC, I use the
RTS line for PTT switching, via a simple transistor switch with no
problems. I've never looked at the DTR line, as I haven't any use for
it in my h/b interface, while running WSPR, so can't answer for what
that line does - but the RTS seems to work as expected.
Regards,
John
On Sun, 25 Jan 2009 11:12:52 +0000 Andy Talbot
<[email protected]> wrote:
> I have (sort-of) sorted out the transmitter control problem. While
> both WSPR.EXE and WSJT6 both refuse to properly control the
> PC-installed COM1 port, they do both behave properly with an FTDI type
> USB COM port.
>
> So am running a WSPR beacon on 503.47kHz for a while.
>
> Still intrigued to know why Joe's software won't drive my COM 1
> properly, whereas it works with USB based conm ports. Whereas other
> software, including direct programming it from VB6, does allow
> complete control of DTR and RTS signal lines.
>
>
> Andy G4JNT
> www.g4jnt.com
>
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