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Date: Mon, 19 Nov 2012 09:44:03 +0000
From: g3zjo <g3zjo@psk31.plus.com>
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Subject: Re: LF: Fwd: JT9-2 failed now JT9-1 500khz + 1400hz
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HI Joe, Tobias, LF

That's great, it brings back some logic into the observed symptoms.
Thank goodness the files I have been flooding Joe with have proved 
useful, I was beginning to feel I was a complete pain.

  The next version could prove quite exciting.

73 Eddie G3ZJO


On 19/11/2012 00:38, Joe Taylor wrote:
> Hi Eddie, Tobias, and all,
>
> I've solved the riddle of Eddie's local JT9-2 transmissions that 
> failed to decode.
>
> The problem is, as originally suspected, the result of small frequency 
> drifts -- in this case acting together with the Gray-coding applied to 
> the data.
>
> I will work on a solution this week, including an appropriate 
> algorithm for measuring and removing small amounts of frequency drift 
> as part of the decoding process.
>
> In the meantime, if you're experiencing this problem it's best to 
> stick with JT9-1 because that sub-mode has the largest tone spacing.
>
>     -- 73, Joe, K1JT
>
>
>
>
> -----
> No virus found in this message.
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> Version: 2012.0.2221 / Virus Database: 2629/5404 - Release Date: 11/18/12
>
>