[RTTY] MMTTY difficulties

[ham at n0sq.us]

I'm not using a USB to serial port adapter. I'm using a real/legacy serial port.

Joe Subich, W4TV <lists at subich.com> wrote ..
> 
> >> Yes. With the diddles turned off I can send traffic to the test
> >> radio OK. But with the diddles turned on no traffic can be sent.
> >> Also, when I try to send traffic with a macro only part of the text
> >> gets sent before the radio dekeys.
> 
> This acts like the USB port is really a USB to serial adapter.
> Select Option | Setup MMTTY | MISC tab ... in the box labeled
> "Tx Port" click the "USB Port" button.  Select "C: Limiting Speed"
> in the "Processing method" box and click "OK.
> 
> 73,
> 
>     ... Joe, W4TV
> 
> 
> On 2/8/2013 10:04 PM, ham at n0sq.us wrote:
> > Kok Chen <chen at mac.com> wrote ..
> >>
> >> On Feb 8, 2013, at 3:51 PM, ham at n0sq.us wrote:
> >>
> >>> A real motherboard serial port - not USB
> >>
> >> So you are probably transmitting in FSK.
> >>
> >> Did you check the baud rate of your UART and make sure it can be set to 45.45
> baud?
> >
> > Yes.
> >
> >> Wrong baud rates usually result in some gibberish print, but you said there
> is
> >> no print at all, correct?
> >
> > Correct.
> >
> >> A reversed RTTY sounds different from correct RTTY; wrong baud rate will also
> sound
> >> distinctly different.  Listen to a real life signal off the air and make sure
> the
> >> KAM prints properly, and listen again to the signal from your own transmitter
> --
> >> do they sound pretty much the same?
> >
> > Kam is working fine.
> >
> >> When you turn diddles off,  does the receiver hear a single constant tone?
> >
> > Yes. But, I did have to go into the TS2000 menu and invert the tones.
> >
> >> With the diddles turned off, do you hear an active RTTY tone pair when you start
> >> typing?
> >
> > Yes. With the diddles turned off I can send traffic to the test radio OK. But
> with the diddles turned on no traffic can be sent. Also, when I try to send traffic
> with a macro only part of the text gets sent before the radio dekeys.
> >
> >> Testing with diddles turned off might at least confirm that your typing is getting
> >> through to the UART.
> >>
> >> 73
> >> Chen, W7AY
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