Re: LF: Ebnaut 477.7 kHz

[jcraig@mun.ca]

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 <markusvester@aol.com>
> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
> 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 <jcraig@mun.ca>
>  An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
>  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:
>
>  > 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: jcraig@mun.ca
>  Date:29/01/2016  12:16 AM  (GMT+01:00)
>  To: rsgb_lf_group@blacksheep.org
>  Subject: LF: QRSS3 477.7 kHz
>
>  In case anyone is interested...
>
>  Reports welcomed.
>
>  73
>  Joe VO1NA 
>   
>