[RTTY] Signals that don't decode

[David G3YYD]

These were 170Hz shift signals. I noticed that 2Tone was telling me that the
stop bit timing was jittering all over the place. I was using a version of
2Tone which has more data displayed than the released version as this helps
with testing of the code. Unfortunately I was not recording the contest so
am unable to play it back and get even more data output from 2Tone.

The test version of 2Tone can output a lot of internal data that can then be
analysed and visualised by using spreadsheet software.

If anyone comes across one of these signals then please ask them what there
RTTY set up is and let me know it may be very helpful.

73 David G3YYD

-----Original Message-----
From: RTTY [mailto:rtty-bounces at contesting.com] On Behalf Of Jeff Stai
Sent: 12 February 2018 18:22
To: Tim Shoppa; g3yyd2 at btinternet.com
Cc: REFL-RTTY
Subject: Re: [RTTY] Signals that don't decode

I heard them too, it's hard to remember from the heat of the moment, but you
may be right about the 850Hz shift. I remember seeing something that made me
think that.

I also got told a couple times I was inverted - whilst running, mind you ;)
I guess we were ALL upside down!

73 jeff wk6i


On Mon, Feb 12, 2018 at 9:31 AM, Tim Shoppa <tshoppa at gmail.com> wrote:

> This may have been the first big RTTY contest that I didn't have 
> anyone call me inverted.
>
> I had a couple callers I could not decode. They sounded inverted but 
> setting my decoder to inverted did not help. Maybe they were inverted 
> and ASCII or something.
>
> But there were a couple other funny signals. One, the guy only had a 
> single tone. It's possible his second tone was at 850Hz or wider shift 
> but I usually have my audio passband pretty wide and probably would've 
> heard a 850Hz shift. MMTTY and 2Tone did not decode this signal, but
Gritty did.
> Wow!
>
> I had a couple callers with some sort of very intermittent signal like 
> their transmitter was cutting out. With enough repeats we got through.
>
> G3YYD - were these problem stations on 40M maybe? There is a time of 
> evening around sunset where 40M "changes" and local easy to hear 
> (sounds
> fine) stations are completely uncopyable due to some sort of multipath 
> effect.
>
> David G3YYD and Alex VE3NEA - than you SO MUCH for 2Tone and GRITTY!!!
>
> Tim N3QE
> _______________________________________________
> RTTY mailing list
> RTTY at contesting.com
> http://lists.contesting.com/mailman/listinfo/rtty
>



--
Jeff Stai ~ wk6i.jeff at gmail.com
Twisted Oak Winery ~ http://www.twistedoak.com/ Facebook ~
http://www.facebook.com/twistedoak
RTTY op at W7RN
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