Re: LF: no decodes, help needed

["Markus Vester" <markusvester@aol.com>]

Hi Joe, LF,

 

thanks for all this work!

 

DK7FC was still decoding sporadically here, but DF2JP not at all this evening, though I could clearly see the two traces side by side. Looks like there is always only one decode per time slot?

 

To possibly aid debugging, I have uploaded six wavs to

http://df6nm.bplaced.net/wsjt/jt9-2_df6nm_121028/

along with a text log indicating successful and failed decodes. "Dial frequency" of my grabber RX is fixed at 135.5 kHz, and the decoder was centered on 1930 Hz.  

 

Unlike WSPR, the nominal frequency appears to be not the center but the lower edge of the transmitted band. This is also apparent in the screenshot in the quickstart guide.

 

For some reason, at the end of each transmission there occurs a short "burp", consisting of a two tone burst approximately +- 23 Hz from the nominal frequency.

 

Best 73

Markus (DF6NM)

 

From: Rik Strobbe

Sent: Sunday, October 28, 2012 8:16 PM

To: rsgb_lf_group@blacksheep.org

Subject: RE: LF: no decodes, help needed

Wolf, Stefan, all,

 

that's what I got here:

 

1750   8  -23   0.4 1430.59  0.00   DK7FC TEST 5W        
1754   6  -24   0.4 1430.59  0.00   DK7FC TEST 5W        
1758   7  -24   0.4 1430.43  0.00   DK7FC TEST 5W        
1810   8  -23   0.4 1430.59  0.00   DK7FC TEST 5W        
1814  10  -23   0.4 1430.35  0.00   DK7FC TEST 5W        
1822   5  -25   0.4 1430.43  0.00   DK7FC TEST 5W        
1826  10  -21  -0.1 1450.94  0.00   CQ DF2JP JO31        
1830  10  -21  -0.1 1450.94  0.00   CQ DF2JP JO31        
1834  10  -20   0.1 1450.94  0.00   CQ DF2JP JO31        
1838  10  -19   0.0 1450.94  0.00   CQ DF2JP JO31        
1842  10  -21  -0.1 1450.94  0.00   CQ DF2JP JO31        
1846  10  -19  -0.1 1450.94  0.00   CQ DF2JP JO31        
1850  10  -21   0.0 1450.94  0.00   CQ DF2JP JO31        
1854  10  -21   0.0 1450.94  0.00   CQ DF2JP JO31        
1858  10  -21  -0.1 1450.94  0.00   CQ DF2JP JO31        
1902   4  -26   0.4 1430.35  0.00   DK7FC TEST 5W        

Despite the fact that DK7FC produces a much stronger trace DF2JP gets better decodes.

 

73, Rik  ON7YD - OR7T

 

---

Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens wolf_dl4yhf [dl4yhf@freenet.de]
Verzonden: zondag 28 oktober 2012 20:06
To: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: no decodes, help needed

Am 28.10.2012 19:59, schrieb wolf_dl4yhf:

Still many more decodes from DK7FC, even though stronger, than from DF2JP.

Excuses, that should have read:
... less decodes from DK7FC, even through stronger than DF2JP..

Actually, now each of DF2JP's overs is decoded, but (almost) none from Stefan even though his signal is still stronger in JO42 .

73, Wolf  DL4YHF .