LF: DK7FC JT9-5

[Halldór <halldorgudmunds@simnet.is>]

Got the following decodes in JT9-5.

 

0010  10  -12   0.9 1442.90  0.00    DK7FC JN49IK        

0020  10   -9   0.9 1442.93  0.00    DK7FC JN49IK 

73

Halldór

TF3HZ

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Stefan Schäfer
Sent: 30. október 2012 00:46
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: DK7FC JT9-5

 

Thanks Markus,

Unbelivable: I got my first decode in JT9! https://dl.dropbox.com/u/19882028/LF/JT9-5.png  DX distance is 20m!! :-)

It was received on a Win7 PC. I used my /p LF receiver which uses the same concept as the grabber RX, a 125 kHz LO, fixed. So i also had to use the same software, i.e. SL to shift the frequency (-11300 Hz), then VAC and then JT9-5.

So obviously it has either to do with the software that is used and/or the CPU performance. On my other PC, there are 6 SL instances running 24/365, also JT9 and VAC. Sometimes the CPU load is 100%. Maybe this causes the non-decodes. But it was no problem for WSPR!

73, Stefan/DK7FC






Am 30.10.2012 01:29, schrieb Markus Vester:

Getting somewhat more regular JT9-5 decodes now from Stefan, and also saw DF2JP. I did switch off the built-in noiseblanker before 23:50. This seemed to further devastate the displayed SNR values, but perhaps improved signal integrity for the decodes?

 

2340  10   -9   0.0 1939.84  0.00    DK7FC JN49IK        
2345  10  -23   0.2 1939.84  0.00
2350  10  -26   0.2 1939.84  0.00    DK7FC JN49IK        
0000  10  -26   0.2 1939.84  0.00    DK7FC JN49IK        
0010  10  -27   0.0 1939.84  0.00    DK7FC JN49IK        
0015   3  -30   0.0 1956.90  0.00   DF2JP JO31JG        

0020  10   -9   0.0 1939.88  0.00

 

73 & good luck,

Markus (DF6NM)