Message-ID: <50A532E3.7010803@psk31.plus.com>
Date: Thu, 15 Nov 2012 18:22:27 +0000
From: g3zjo <g3zjo@psk31.plus.com>
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To: rsgb_lf_group@blacksheep.org, Joe Taylor <joe@Princeton.EDU>
References: <50A39DC2.6050703@psk31.plus.com> <50A39E57.3070006@psk31.plus.com> <50A50963.70307@gmx.net> <50A510FE.4000305@psk31.plus.com>
In-Reply-To: <50A510FE.4000305@psk31.plus.com>
Subject: Re: LF: Fwd: JT9-2 failed now JT9-1 500khz + 1400hz
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Hi Tobias / Joe

I checked this, first I am very sorry for getting you to download almost 
blank files, I selected the 2 minute quiet periods between my 
transmissions by mistake. I now have deleted those.

Replaying the remaining three I get one that decodes and 2 that don't 
the same as when rx'd live.

Joe K1JT what is your verdict on these JT9-2 files from my TX please.

73
Eddie

On 15/11/2012 15:57, g3zjo wrote:
> Thanks Tobias
>
> That is most interesting. there should be 3 that decoded fine and 2 
> that failed it seems that my human error selected 2 wrong files which 
> leaves 2 that should have been OK and the last one which shows 1.142 
> sec time shift which was a non decode.
>
> There should be no timing problems at all unless they are introduced 
> within the software,my computer times are spot on and do not vary 
> during the short test periods, the fail always comes after 5,6, or 7 
> TX RX periods then remains. Hmm.
>
> 73 Eddie
>
>
>
> On 15/11/2012 15:25, Tobias DG3LV wrote:
>> Hello Eddie !
>>
>> Those files, that do not decode directly in WSJT-X, could be decoded 
>> if replayed with a (round about) -1 second timeshift. Using the 
>> "audacity"-program as a (time-shifted-) tone source WSJT-X (rev 2717) 
>> did decode 1244, 1248, 1252 files correctly :
>> 1340  10   18  -0.3 1408.93  0.00   G3ZJO TEST
>> (UTC is time of replay)
>>
>> (Files 1246 and 1250 were almost "silence", i.e. no JT9 tones.)
>>
>> The JT9-tones start at :
>> 1244: 1.096 sec
>> 1248: 1.080 sec
>> 1252: 1.142 sec
>> after the begin of the file.
>>
>> Maybe this helps locating the problem.
>>
>> 73 de dg3lv Tobias
>>
>> Am 14.11.2012 14:36, schrieb g3zjo:
>>>
>>> The usual happened to my local de-codes 6 or 7 transmit periods and 
>>> they
>>> fail to de-code.
>>>
>>> Transmitter drift is noted as less than 0.75Hz in a 4minute RX - TX
>>> period. After 7 decodes they failed, I assume the drift becomes more
>>> rapid than the tolerance level over time.
>>>
>>> The files are, 3 before 2 after de-code fail :-
>>>
>>> https://www.sugarsync.com/pf/D0881137_61669144_98927
>>> https://www.sugarsync.com/pf/D0881137_61669144_98929
>>> https://www.sugarsync.com/pf/D0881137_61669144_98921
>>> https://www.sugarsync.com/pf/D0881137_61669144_98923
>>> https://www.sugarsync.com/pf/D0881137_61669144_98066
>>>
>>> Eddie
>>>
>>>
>>>
>>
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2012.0.2221 / Virus Database: 2441/5395 - Release Date: 
>> 11/14/12
>>
>>
>
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2221 / Virus Database: 2441/5395 - Release Date: 11/14/12
>
>