rtty via cw paddle

[todd ruby-2]

I tried working ZS9MADIBA  today and he kept coming back saying my settings must be wrong because I was not printing correctly. So indeed I changed the Mark to 2125 hz from 915 but that did not help either. He thought I was reversed but when I pressed reverse data, I could no longer read him so that was not the solution.

Can any of you RTTY guys help me out?

thanks in advance

todd

WB2ZAB
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[jeff stai-2]

hi Todd - As I understand it, the K3 when transmitting RTTY via CW paddles
does not send "diddles" - rather, it stays in a constant state until you
give it a character via the paddles and then it sends the character.

Some decoders and some decoders under some conditions do not respond well
to this because the decoder gets out of sync - the start time of the second
character is not an integral number of character periods from the first
character. These decoders sync with the character cycle in an attempt to
reduce errors.

Most encoders send "diddles" - a non-printing character like LTRS sent over
and over - to help the decoder maintain character sync when there is no
printing character to send. A great explanation of this can be found here:

http://www.aa5au.com/gettingstarted/rtty_diddles_technical.htm

I probably have some detail of this wrong but I'm pretty sure the gist is
correct. 73 jeff wk6i



On Thu, Dec 19, 2013 at 9:23 AM, todd ruby <[hidden email]> wrote:

> I tried working ZS9MADIBA  today and he kept coming back saying my
> settings must be wrong because I was not printing correctly. So indeed I
> changed the Mark to 2125 hz from 915 but that did not help either. He
> thought I was reversed but when I pressed reverse data, I could no longer
> read him so that was not the solution.
>
> Can any of you RTTY guys help me out?
>
> thanks in advance
>
> todd
>
> WB2ZAB
> ______________________________________________________________
> 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
>

--
Jeff Stai ~ [hidden email]
Twisted Oak Winery ~ http://www.twistedoak.com/
Facebook ~ http://www.facebook.com/twistedoak
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