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Re: LF: Ebnaut 477.7 kHz

To: [email protected]
Subject: Re: LF: Ebnaut 477.7 kHz
From: [email protected]
Date: Mon, 1 Feb 2016 17:55:30 -0330 (NST)
In-reply-to: <[email protected]>
References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Thanks Markus and Roelof for the reports.

I'm guessing a slower bit rate and more power might help.
Please feel free to make a suggestion and we'll try again
tonight.

73
Joe VO1NA

On Mon, 1 Feb 2016, Markus Vester wrote:

    Got some pieces of carrier in the spectrogram, up to about 10 dB SNR in 1 
mHz. Considering the carrier duty cycle (8.5 out of 15 minutes), that would 
have been about +15 dB in a mHz for a pure carrier, or -15 dB EbN0 at 1.1 
bit/s net data rate - no chance for a decode here.
  
 Best 73,
 Markus  (DF6NM)

 
-----Ursprüngliche Mitteilung-----
Von: Markus Vester &lt;[email protected]&gt;
An: rsgb_lf_group &lt;[email protected]&gt;
Verschickt: So, 31 Jan 2016 10:43 pm
Betreff: Re: LF: Ebnaut 477.7 kHz

     Hi Joe,
    
   even though the noise is less than ideal here, I'll will be watching and 
saving data for possible decodes. There's an updating spectrogram 
https://dl.dropboxusercontent.com/u/26404526/opds8.png on the opds page - 
if you leave the carrier on between EbNaut rounds, it might become visible 
and assist in checking the decoder frequency offset.
    
   Good luck,
    
   Markus (DF6NM)
    


 -----Ursprüngliche Mitteilung-----
 Von: jcraig &lt;[email protected]&gt;
 An: rsgb_lf_group &lt;[email protected]&gt;
 Verschickt: So, 31 Jan 2016 9:04 pm
 Betreff: LF: Ebnaut 477.7 kHz

 Hi Domenico,

 All set up for 2200 utc tonight and at 15 min intervals thereafter.
 75 chars K19A 1936 symbols 387.2 seconds 10 watts continuous carrier
 unless the FET fries!

 The same DOCXO ref osc will be used, but there may be a (small) rounding
 error in the frequency.

 Good Luck 73
 Joe VO1NA

 On Fri, 29 Jan 2016, iz7slz.domenico wrote:

 &gt; Hello Joe, group

 I don't known if you are using same stable exciter that you have used in your
 recent LF EbNaut test. 
 If so, i invite you to try  some  EbNaut transmissions on MF in the next 
days. 
 In good condx i often copy some traces of your MF signal here in JN80, so it
 will be an interesting experiment try to decode some 
 T/A messages from you.


 Thanks in advance.

 73, Domenico IZ7SLZ



 Sent from Samsung Mobile

 -------- Original message --------
 From: [email protected]
 Date:29/01/2016  12:16 AM  (GMT+01:00)
 To: [email protected]
 Subject: LF: QRSS3 477.7 kHz

 In case anyone is interested...

 Reports welcomed.

 73
 Joe VO1NA 
  
  


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