K3 RTTY Decode Not Woirking

[Jim Brown-10]

I've got two K3s in an SO2R setup. RTTY decode does not work with either
one. It's turned on, I'm using the lowest tone set (915 Hz), set for 170
Hz shift. Plenty of signal, CWT is on and centered. MMTTY decodes very
well. Decoder simply dumps out random characters.  I've played with the
threshold settings, and with AF and RF gain settings. Tried AFSK A and
FSK D, no difference in decode.

Any ideas?

73, Jim K9YC




______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[N7US]

Jim,

I'd never used 915 Hz before, as I'd been using 1275 for quite a while now
with the K3.  I left MMTTY alone and just turned the K3 pitch to 915 and the
TEXT DEC to thr 3 and ON with FSK D.  The K3 is copying now on 20 RTTY just
fine.

I tuned in the signal first at 1275 with the crossed ellipses in MMTTY
before I switched the radio to 915.  I have three bars on each side with
CWT.  I'm using a 300 Hz DSP BW with the 400 Hz filter now.

I'm actually using DXLab's WinWarbler with MMTTY, but I think that's
irrelevant.

Jim N7US


-----Original Message-----


I've got two K3s in an SO2R setup. RTTY decode does not work with either
one. It's turned on, I'm using the lowest tone set (915 Hz), set for 170
Hz shift. Plenty of signal, CWT is on and centered. MMTTY decodes very
well. Decoder simply dumps out random characters.  I've played with the
threshold settings, and with AF and RF gain settings. Tried AFSK A and
FSK D, no difference in decode.

Any ideas?

73, Jim K9YC



______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Rick Prather-2]

Jim,

Is the baud rate set to 45 or 75?

Rick,
K6LE


On 5/21/2011, at 6:25 , Jim Brown wrote:

> I've got two K3s in an SO2R setup. RTTY decode does not work with either
> one. It's turned on, I'm using the lowest tone set (915 Hz), set for 170
> Hz shift. Plenty of signal, CWT is on and centered. MMTTY decodes very
> well. Decoder simply dumps out random characters.  I've played with the
> threshold settings, and with AF and RF gain settings. Tried AFSK A and
> FSK D, no difference in decode.
>
> Any ideas?
>
> 73, Jim K9YC
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Jim Brown-10]

On 5/21/2011 7:16 PM, Rick Prather wrote:
> Is the baud rate set to 45 or 75?

That was it!  Thanks for all the ideas.

73, Jim K9YC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html