[RTTY] MMTTY difficulties

[ham at n0sq.us]

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